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Ametek California Instruments Sequoia Series User Manual

Ametek California Instruments Sequoia Series User Manual

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P/N M447352-01
Revision B
March 2025
Copyright © 2024
AMETEK Programmable Power
All rights reserved
Sequoia / Tahoe
Series
AC/DC Power Source
User Manual

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Summary of Contents for Ametek California Instruments Sequoia Series

  • Page 1 P/N M447352-01 Revision B March 2025 Copyright © 2024 AMETEK Programmable Power All rights reserved Sequoia / Tahoe Series AC/DC Power Source User Manual...
  • Page 3 California Instruments Sequoia / Tahoe Series User Manual This page is intentionally left blank. M447352-01 REV-B...

  • Page 5: Contact Information

    Sequoia / Tahoe Series User Manual About AMETEK AMETEK Programmable Power, Inc., a Division of AMETEK, Inc., is a global leader in the design and manufacture of precision, programmable power supplies for R&D, test and measurement, process control, power bus simulation and power conditioning applications across diverse industrial segments. From bench...

  • Page 6: Important Safety Instructions

    AMETEK Programmable Power Inc., San Diego, California, USA, or any of the subsidiary sales organizations, cannot accept any responsibility for personnel, material or inconsequential injury, loss or damage that results from improper use of the equipment and accessories.

  • Page 7: Product Return Procedure

    3. Provide replacement parts for the defective Product. The Buyer is responsible for returning the defective Product or parts to AMETEK at their own expense, following the specified return procedure. AMETEK will cover the costs of delivering the repaired or replaced Product or parts back to the Buyer.

  • Page 8: Table Of Contents

    Sequoia / Tahoe Series User Manual California Instruments CONTENTS INTRODUCTION ................1 General Description ..........................2 Key Benefits ............................2 Simple Operation ..........................2 1.2.1 1.2.2 Configurations ............................2 Choice of Voltage Range ........................2 1.2.3 1.2.4 High Crest Factor ..........................3 Remote Control ............................
  • Page 9 California Instruments Sequoia / Tahoe Series User Manual SINK- Electronic Load mode – RLC programming ranges- 3 Phase........18 2.11 SINK- Electronic load mode – RLC programming ranges- Single phase......... 20 2.12 AC Input Specifications ........................23 2.13 2.14 AC Output Measurements ........................
  • Page 10 Sequoia / Tahoe Series User Manual California Instruments 2.38 EHF Option Specifications ....................... 50 UNPACKING AND INSTALLATION ..........53 Unpacking ............................53 Contents of Shipment ........................53 3.1.1 Power Requirements ......................... 53 Mechanical Installation ........................55 Outline Drawings ..........................55 3.4.1 Rear Panel Protective Covers ......................
  • Page 11 California Instruments Sequoia / Tahoe Series User Manual 4.2.2 Remote Inhibit ..........................119 Trigger IN Function .......................... 120 4.2.3 4.2.4 Summary Fault Signal ........................120 Output ON/OFF Status ........................121 4.2.5 4.2.6 External Analog Modulation of Output Voltage (Source and Grid-Simulator MODE) ..... 123 External Analog Control Signal Connector .................
  • Page 12 Sequoia / Tahoe Series User Manual California Instruments 5.9.5 Output Program Screen ........................215 Current Transients Screen ......................217 5.9.6 5.9.7 Configuration Screen ........................225 5.10 HOME Screen Top-Level Menu - (Electronic load Power Programming Mode) ....236 5.10.1 Banner Screen ..........................236 5.10.2 HOME Screen ..........................
  • Page 13 California Instruments Sequoia / Tahoe Series User Manual 7.3.2 Trigger source ..........................297 Trigger delay ............................. 298 7.3.3 TRANSIENT PROGRAMMING ............. 301 Voltage Transient Programming ....................301 8.1.1 Using Transient Modes ........................301 Programming Slew Rates ....................... 308 8.1.2 8.1.3 Switching Waveforms in Transient Lists ..................
  • Page 14 Sequoia / Tahoe Series User Manual California Instruments 10.2.12 Output Current Measurement AC High-Range Gain Alignment, AC-Mode ......335 Output Current Measurement AC Low-Range Offset Alignment, AC-Mode ......335 10.2.13 10.2.14 Output Current Measurement AC High-Range Offset Alignment, AC-Mode ......336 Inter-Harmonics Board Calibration (IEC413 Option Only) ............
  • Page 15 California Instruments Sequoia / Tahoe Series User Manual 12.3.4 Distorted Output ..........................371 Unit Shuts Down after Short Interval ..................... 371 12.3.5 Basic Troubleshooting in Electronic load Mode ................ 371 12.4 12.4.1 Over Voltage Fault ........................... 372 12.4.2 Sync settings error ........................... 372 12.4.3 Distorted Output current........................
  • Page 16 Sequoia / Tahoe Series User Manual California Instruments LIST OF FIGURES Figure 1-1: Sequoia / Tahoe Series Front View ..................1 Figure 2-1: Energy flow in source mode operation ..................7 Figure 2-2: Energy flow in SINK operating mode ..................8 Figure 2-3: Energy flow in Electronic load operating mode .................
  • Page 17 California Instruments Sequoia / Tahoe Series User Manual Figure 3-33: Connections for 3-Phase Leader/Auxiliary Multi-Phase Group – SQ/TA 0090 ..... 97 Figure 3-34: RS-232C Interface Connector ....................98 Figure 3-35: USB Type – B Interface Connector ..................99 Figure 3-36: LAN Interface 8P8C Modular Connector ................100 Figure 3-37: GPIB interface Connector ....................
  • Page 18 Sequoia / Tahoe Series User Manual California Instruments Figure 5-17: Banner Screen – TAHOE Series..................145 Figure 5-18: HOME Screen for Source Mode – SEQUOIA ..............145 Figure 5-19: HOME Screen – TAHOE Series ..................146 Figure 5-20: DASHBOARD Screen Top-Level Menu for Source Mode ..........147 Figure 5-21: Real-Time, Immediate Output Parameter Adjustment ............
  • Page 19 California Instruments Sequoia / Tahoe Series User Manual Figure 5-67: PONS Voltage Settings ....................... 179 Figure 5-68: : PONS OVP Settings ......................180 Figure 5-69: PONS Mode Settings ......................180 Figure 5-70: PONS Range Settings ......................180 Figure 5-71: PONS Current Settings ......................181 Figure 5-72: PONS Frequency Settings ....................
  • Page 20 Sequoia / Tahoe Series User Manual California Instruments Figure 5-117: PONS Regulation menu ....................206 Figure 5-118: PONS Output Settings ...................... 206 Figure 5-119: PONS Voltage Sense Settings..................207 Figure 5-120: PONS Clock Config Settings..................... 207 Figure 5-121: PONS Waveform Settings ....................208 Figure 5-122: PONS ALC Settings ......................
  • Page 21 California Instruments Sequoia / Tahoe Series User Manual Figure 5-167: PONS Power Factor Settings .................... 233 Figure 5-168: PONS Sync Settings ......................233 Figure 5-169: PONS Waveform Settings ....................234 Figure 5-170: PONS ALC Settings ......................234 Figure 5-171: PONS Reference Settings ....................234 Figure 5-172: PONS Phase Number Settings..................
  • Page 22 Sequoia / Tahoe Series User Manual California Instruments Figure 5-217: Waveform Settings – AC mode ..................258 Figure 5-218: Range Settings ........................259 Figure 5-219: Mode Settings ........................259 Figure 5-220: ALC Settings ........................260 Figure 5-221: PROFILES Menu, NAME Sub-Menu ................260 Figure 5-222: CONFIGURATION Menu, PROFILES Sub-Menu ............
  • Page 23 California Instruments Sequoia / Tahoe Series User Manual Figure 5-265: MAC Address ........................281 Figure 5-266: Host Name ......................... 281 Figure 5-267: Restore Default ........................281 Figure 5-268: CONTROL INTERFACE REMOTE INHIBIT Menu ............282 Figure 5-269: Ambient Status LED setting Screen .................. 282 Figure 5-270: SYSTEM SETTINGS Screen.....................
  • Page 24 Sequoia / Tahoe Series User Manual California Instruments Figure 8-25: Switching Waveforms in a Transient List Transient Execution ........... 317 Figure 8-26: RUN Menu: Start and Abort Fields ..................317 Figure 8-27: CONFIGURATION Menu, PROFILES Selection ..............318 Figure 9-1: Virtual-Panel GUI-Windows Program for IEC 61000-4-11 Tests .......... 322 Figure 9-2: IEC 61000-4-13 Test Flowchart Class 1 and Class 2 ............
  • Page 25 California Instruments Sequoia / Tahoe Series User Manual LIST OF TABLES Table 2-1: Resistance range for different models- Three Phase -AC mode ..........18 Table 2-2: Resistance range for different models- Three Phase DC mode ..........19 Table 2-3: Inductance range for different models- Three Phase Mode ............. 19 Table 2-4: Capacitance range for different models- Three Phase mode ...........
  • Page 26 Sequoia / Tahoe Series User Manual California Instruments Table 3-27: Leader Select and Emergency Stop Switch ................90 Table 3-28: External Sense Connector ..................... 98 Table 3-29: RS-232C Interface Connector Type ..................98 Table 3-30: RS-232C Interface Connector Pinout ..................99 Table 3-31: USB Interface Connector Type ....................
  • Page 27 California Instruments Sequoia / Tahoe Series User Manual This page is intentionally left blank. xxiii M447352-01 REV-B...

  • Page 29: Introduction

    Sequoia / Tahoe Series User Manual California Instruments 1. INTRODUCTION This manual provides instructions for installing, operating, and calibrating the Sequoia/Tahoe Series power source models with 1-phase/3-phase output. The Sequoia/Tahoe Series is a next-generation switched- mode power source, offering accurate output with low distortion, high precision, and fast dynamic response.

  • Page 30: General Description

    California Instruments Sequoia / Tahoe Series User Manual General Description The Sequoia / Tahoe Series AC and DC power source systems are high efficiency, floor standing AC and DC power sources that provide a precise output with low distortion. Available voltage ranges are 166 VAC, 333 VAC in AC and AC+DC modes and 220 VDC, 440 VDC in DC mode.

  • Page 31: High Crest Factor

    Sequoia / Tahoe Series User Manual California Instruments Line- Line voltage for XVC444, XVC555, XVC666, and XVC721 is 769 V, 961 V, 1153 V and 1248 V, respectively. Note: The EHF loop is disabled for the XVC range. For custom applications, a user-defined XVC option is also available.

  • Page 32: Regulatory Compliance Testing

    California Instruments Sequoia / Tahoe Series User Manual programmability of load current waveform, the optional electronic load (only present in Sequoia Series) mode is your solution for validating onboard power conversion systems. 1.3.4 Regulatory Compliance Testing As governments and regulatory bodies expand enforcement of product quality standards, regulatory compliance testing has become a requirement for manufacturers.

  • Page 33: Sequoia Series Models

    Sequoia / Tahoe Series User Manual California Instruments SEQUOIA Series Models TAHOE Series Models...
  • Page 34 Sequoia / Tahoe Series User Manual California Instruments This page is intentionally left blank. M447352-01 REV-B...

  • Page 35: Specifications

    Sequoia / Tahoe Series User Manual California Instruments 2. SPECIFICATIONS Unless otherwise noted, the specifications are valid under the following conditions: a) Ambient temperature of 25 ± 5°C; after a 30-minute warm-up; fixed AC input line and load. b) Individual unit and individual output phase, with sine wave output, and into a resistive load. c) For system configurations, specifications are for phase output, line-to-neutral;...

  • Page 36: Sink - Grid Simulator Mode

    Sequoia / Tahoe Series User Manual California Instruments 2.1.2 SINK - Grid Simulator Mode: This mode is applicable only for the SEQUOIA series. The TAHOE series does not support this mode. Energy flow is from the UUT to the facility AC power distribution through the SEQUOIA as shown in Figure 2-2: Energy flow in SINK operating mode.

  • Page 37: Output Electrical Characteristics - All Operating Modes

    Sequoia / Tahoe Series User Manual California Instruments Figure 2-3: Energy flow in Electronic load operating mode Output Electrical Characteristics – All operating modes The following output characteristics are common for Source mode, SINK-Grid simulator mode, and SINK- Electronic load mode. Applicable for all Models SQ15: Single Phase only.

  • Page 38: Output Electrical Characteristics- Source Mode

    Sequoia / Tahoe Series User Manual California Instruments SQ0022/TA0022 and SQ0090/TA0090 up to 6; SQ0030/TA0030 up to 4.5; SQ0015/TA0015 and Repetitive Peak Current SQ0045/TA0045 up to 3 times of full scale rms current. Maximum Peak Value reflects absolute peak current protection level. This level may not be reached under all load conditions.

  • Page 39: Output Electrical Characteristics- Ac/Dc Sink -Grid Simulator Mode

    Sequoia / Tahoe Series User Manual California Instruments Applicable for all Models Voltage Line Regulation 0.1% for 10% input line change Voltage slew rate, typical < 0.5 V/micro sec DC Offset Voltage, Typical < ±20 mVDC Low V Range: < 2 Vrms Output Noise High V Range: <...

  • Page 40: Output Electrical Characteristics- Ac/Dc Sink - Electronic Load Mode

    Sequoia / Tahoe Series User Manual California Instruments Voltage ± (0.2% of full-scale) for DC and AC - 16 Hz to 550 Hz; From 5% V range to 100% of V Programming range, RMS bandwidth < 10 kHz. Accuracy < 1 % @ 16 - 66 Hz Voltage Distortion <...
  • Page 41 Sequoia / Tahoe Series User Manual California Instruments Applicable for all Models Refer to section 2.11 for the details. At a given operating voltage Minimum and Maximum resistance is determined as follows: Minimum resistance = Operating UUT Voltage / (Maximum RMS current at the Resistance range per phase operating voltage) (Applicable to AC mode and DC...

  • Page 42: Output Power And Current Ratings - Three Phase Ac Modes

    Sequoia / Tahoe Series User Manual California Instruments Applicable for all Models For Models up to 45 kVA, specifications are valid only if the programmed value of active & reactive power is greater than: 10% of 15 kW & ±10% of 15 kVAR. For Models greater than 45 kVA, specifications are valid only if the programmed value of active &...

  • Page 43: Output Power And Current Ratings - Three Phase Ac, Ac+Dc Modes And Dc Mode

    Sequoia / Tahoe Series User Manual California Instruments Output Power and Current Ratings – Three Phase AC, AC+DC Modes and DC Mode The following output characteristics are common for Source mode for all models. For the SEQUOIA models, SINK-Grid simulator mode, and SINK- Electronic Load modes. AC mode and AC + DC mode Output Output DC mode Output Current, Rated...

  • Page 44: Output Power And Current Ratings - Single Phase Ac Mode

    Sequoia / Tahoe Series User Manual California Instruments Output Power and current ratings – Single Phase AC Mode The following output characteristics are common for Source mode for all models. For the SEQUOIA and TAHOE models, SINK-Grid simulator mode, and SINK- Electronic Load modes. Output Current, Rated (per Phase Output Mode)AC mode...

  • Page 45: Output Power And Current Ratings - Single Phase Dc And Ac+Dc Mode

    Sequoia / Tahoe Series User Manual California Instruments Output Power and Current Ratings - Single Phase DC and AC+DC Mode Output Power AC+DC mode, Output Current, (kVA) DC & Rated (Per Phase) RMS DC mode Output Current, AC+DC modes Model No of chassis Rated (Per Phase) DC (A) Low –...

  • Page 46: Sink- Electronic Load Mode - Rlc Programming Ranges- 3 Phase

    Sequoia / Tahoe Series User Manual California Instruments Figure 2-4: Output current limit characteristics - Constant Power Mode SINK- Electronic Load mode – RLC programming ranges- 3 Phase. 2.11 The following output characteristics are applicable only for SEQUOIA model. Resistance Range (per phase)- AC Mode Minimum Resistance Maximum Resistance Model...

  • Page 47: Table 2-2: Resistance Range For Different Models- Three Phase Dc Mode

    Sequoia / Tahoe Series User Manual California Instruments Resistance Range (per phase)- DC Mode Minimum Resistance Maximum Resistance Model (Milli Ohms) (Ohms) 220 V 440 V 220 V 440 V SQ0022 2423 6471 1211 3235 SQ0030 1816 4846 2422 SQ0045 1212 3236 1617...

  • Page 48: Sink- Electronic Load Mode - Rlc Programming Ranges- Single Phase

    Sequoia / Tahoe Series User Manual California Instruments Capacitance Range (per phase)- 3 Phase - AC mode Model Maximum Capacitance (uF) Minimum Capacitance (uF) 166 V 333 V 166 V 333 V SQ0022 3456 SQ0030 4613 1146 SQ0045 6919 1719 SQ0090 13839 3437...

  • Page 49: Table 2-6: Resistance Range For Different Models - Single Phase - Dc Mode

    Sequoia / Tahoe Series User Manual California Instruments Resistance Range (per phase)-Single Phase - DC Mode Minimum Resistance Maximum Resistance Model (Milli Ohms) (Ohms) 220 V 440 V 220 V 440 V SQ0015 1212 3236 1617 SQ0022 2153 1076 SQ0030 1616 SQ0045 1077...

  • Page 50: Table 2-8: Capacitance Range For Different Models- Single Phase Ac-Mode

    Sequoia / Tahoe Series User Manual California Instruments Capacitance Range (per phase)- AC mode Model Minimum Capacitance (uF) Maximum Capacitance (uF) 166 V 333 V 166 V 333 V SQ0015 6919 1719 SQ0022 10368 2579 SQ0030 13839 3437 SQ0045 20669 5158 SQ0090 41338...

  • Page 51: Ac Input Specifications

    Sequoia / Tahoe Series User Manual California Instruments 2.13 AC Input Specifications Line current Inrush current Model Line VA 58 ARMS @ 187 V 77 Apk @ 208 V 52 ARMS @ 207 V 73 Apk @ 230 V SQ0015 / TA0015 18 kVA 30 ARMS @ 360 V 44 Apk @ 400 V...
  • Page 52 Sequoia / Tahoe Series User Manual California Instruments Each SQ0090 chassis requires its own Each SQ0090 chassis requires its 336 kVA AC service. Total Line currents are 3 x own AC service. Total peak SQ0270 / TA0270 SQ0090/TA0090 currents are 3 x SQ0090/TA0090 Each SQ0090 chassis requires its own Each SQ0090 chassis requires its 448 kVA...

  • Page 53: Ac Output Measurements

    Sequoia / Tahoe Series User Manual California Instruments 2.14 AC Output Measurements Measurement specifications apply to SQ0015 & TA0015 in single-phase mode and SQ0022 & TA0022 / SQ0030 & TA0030 / SQ0045 & TA0045 / SQ0090 & TA0090 in three-phase mode. Refer to the notes for details on other models and configurations.

  • Page 54: Harmonics Measurements

    Sequoia / Tahoe Series User Manual California Instruments Real Power 0 - 30 kW SQ0090 & TA0090 Reactive Power SQ0015 & TA0015 0 - 15 kVAR 10 VAR SQ0022 & TA0022 1%FS, < 100 Hz SQ0030 & TA0030 2.5%FS, > 100 - 300 Hz SQ0045 &...

  • Page 55: Dc Output Measurements

    Sequoia / Tahoe Series User Manual California Instruments 2.16 DC Output Measurements Measurement specifications apply to SQ0015 & TA0015 in single-phase mode and SQ0022 & TA0022 / SQ0030 & TA0030 / SQ0045 & TA0045/ SQ0090 & TA0090 in DC mode. See notes for other models and configurations.

  • Page 56: Operational Characteristics

    Sequoia / Tahoe Series User Manual California Instruments 2.17 Operational Characteristics Operational characteristics common for all three operation modes: Source mode (all models), and for SEQUOIA models only, SINK-Grid Simulator mode and SINK-Electronic load mode. Parameter Characteristic Multi-chassis configurations are formed with up to six units in parallel using one Leader unit and up to five units operating as follower units.
  • Page 57 Sequoia / Tahoe Series User Manual California Instruments Output is controlled to produce transient events with 500 µs programming resolution: Voltage: drop, step, sag, surge, sweep; Transient Generator Frequency: step, sag, surge, sweep; Voltage and Frequency: step, sweep. Supported up to 905Hz. External Drive 0-7.00 Vrms aux input.

  • Page 58: Additional Ac Only Output Range Hardware Options

    Sequoia / Tahoe Series User Manual California Instruments Mode Users can program Resistance, Inductance and Capacitance as load as per the range specified for each output model. In this mode SEQUOIA programs the RMS Programming- current with appropriate phase angle to the output as per the programmed RLC SINK- Electronic values.

  • Page 59: Hardware Options

    Sequoia / Tahoe Series User Manual California Instruments 2.20 Hardware options Adds dust filters to the front panel air inlet 0 A - Air Filter, option The Chilled door option is a rack cooling system available only for SQ/TA 0090 configurations.

  • Page 60: Sink Option

    Sequoia / Tahoe Series User Manual California Instruments 2.21 SINK option The following output characteristics are applicable only for SEQUOIA model. In Grid Simulator Mode SEQUOIA regulates the output voltage to the user set value and works as the grid to UUT. SEQUOIA serves as the grid and sinks the current generated by UUT.

  • Page 61: Clock And Lock Mode Option

    Sequoia / Tahoe Series User Manual California Instruments 2.23 Clock and Lock Mode Option Clock and Lock interface option for Leader unit. Multi-phase configurations are formed with up to three units using the Clock and Lock signal interface. One-unit acts as the Leader and provides the reference signals to the LKM, option other Follower units.
  • Page 62 Sequoia / Tahoe Series User Manual California Instruments Function Characteristics Signal input for output voltage modulation of waveform set by internal controller reference; 0-5 Vrms signal range for 0-10% output voltage amplitude modulation; External Analog programming accuracy, ±2% of full-scale output; Modulation of individual inputs provided for each output phase;...

  • Page 63: Remote Control Digital Interface Characteristics

    Sequoia / Tahoe Series User Manual California Instruments Function Characteristics Signal output indicating that a fault condition is present; solid-state, normally-closed ac/dc switch; Summary Fault logic level, active-low (open-circuit when fault is not present); Output switch ratings: 50 V, maximum peak voltage; 0.1 A, maximum current; 2.5 Ω, maximum resistance;...

  • Page 64: Front Panel Controls/Indicators

    Sequoia / Tahoe Series User Manual California Instruments 2.26 Front Panel Controls/Indicators Controls/Indicators Touch-Panel, TFT color LCD display with menu-based control. Display Size: 5" diagonal. Rotary encoder for menu navigation and parameter adjustment and entry, with integrated selection switch. Input Switch: turns unit ON/OFF, located on the top left corner of the front panel. disconnects the low voltage bias supply of the SEQUOIA /TAHOE.
  • Page 65 Sequoia / Tahoe Series User Manual California Instruments Connector Description Control analog and monitor signals for each output phase for user remote control. (Includes external voltage signals for output programming, output voltage External Interface-I monitors and output current monitors.) safety isolation: SELV-rated; connector: high-density, 15-contact, female Subminiature-D.

  • Page 66: Protection Function Characteristics

    Sequoia / Tahoe Series User Manual California Instruments 2.28 Protection Function Characteristics Function Characteristic In-line fast acting fuses. Check fuse rating in Service and Maintenance section. Ratings will depend on AC input Input Over current configuration settings. Circuit breaker for LV supply. Input Over voltage Automatic shutdown.

  • Page 67: Regulatory Agency Compliance

    Sequoia / Tahoe Series User Manual California Instruments 2.30 Regulatory Agency Compliance Parameter Specification CE marked for EMC Directive 2014/30/EU per EN 61326-1:2013 Class A for Emissions and Industrial Immunity levels as required. Safety CE marked for LVD compliance 2014/35/EU to EN 61010-1, Edition 3.1 Installation Overvoltage Category: ΙΙ;...
  • Page 68 Sequoia / Tahoe Series User Manual California Instruments Parameter Specification Unit Weight 2500 lbs. (1133 kg) SQ0090 & TA0090 Chilled Door Weight: 450 lbs. (204.1 kg) Total Weight of Chilled door Frame Weight: 75 lbs. (34 kg) assembly Total Added Weight: 525 lbs. (238.1 kg) Shipping Weight 700 lbs.

  • Page 69: Firmware/Software Options

    For Avionics options, reference the Avionics Software Manual (P/N 4994-971) for test details. All options require the use of the provided Virtual Panels, graphical user interface Windows application software GUI; refer to AMETEK PPD website, www.programmablepower.com, to download the latest version.

  • Page 70: Table 2-10: Phase Output Current And Power Specifications For Xvc444 Option -Three Phase

    Sequoia / Tahoe Series User Manual California Instruments AC mode Output Current, Output Power (kVA) Model No of chassis Rated (Per Phase) AC mode RMS (A) Peak (A) 1 x SQ0022 / SQ0022/TA0022 22.5 1 x TA0022 1 x SQ0030 / SQ0030/TA0030 1 x TA0030 1 x SQ0045 /...

  • Page 71: Xvc555 Option Specifications

    Sequoia / Tahoe Series User Manual California Instruments Output AC mode Output Current, Full-Scale (Per Phase) Power (kVA) Model No of chassis AC mode RMS (A) Peak (A) SQ0015/TA0015 1 x SQ0015 / 1 x TA0015 SQ0022/TA0022 1 x SQ0022 / 22.5 1 x TA0022 SQ0030/TA0030...

  • Page 72: Table 2-12: Common Output Electrical Specifications For Xvc555 Option

    Sequoia / Tahoe Series User Manual California Instruments Voltage Programming Accuracy ± 0.25% of Full Scale / ±1.5 VAC rms Output Coupling AC coupled with Standard option: 45 Hz – 500 Hz not supported in HF Frequency range option. Table 2-12: Common Output electrical specifications for XVC555 option Output Power AC mode Output Current, Rated (kVA)

  • Page 73: Xvc666 Option Specifications

    Sequoia / Tahoe Series User Manual California Instruments AC mode Output Current, Full- Output Scale Model No of chassis Power (kVA) (Per Phase) AC mode RMS (A) Peak (A) 1 x SQ0090 SQ0090/TA0090 1 x TA0090 2 x SQ0090 SQ0180/TA0180 2 x TA0090 3 x SQ0090 SQ0270/TA0270...

  • Page 74: Table 2-16: Phase Output Current And Power Specifications For Xvc666 Option-Three Phase

    Sequoia / Tahoe Series User Manual California Instruments Output Power AC mode Output Current, Rated (kVA) (Per Phase) Model No of chassis AC mode RMS (A) Peak (A) 1 x SQ0022 / 22.5 11.2 33.6 SQ0022/TA0022 1 x TA0022 1 x SQ0030 / SQ0030/TA0030 1 x TA0030 1 x SQ0045 /...

  • Page 75: Xvc721 Option Specifications

    Sequoia / Tahoe Series User Manual California Instruments 1 x SQ0045 / SQ0045/TA0045 67.5 202.5 1 x TA0045 2 x SQ0045 2 x TA0045 SQ0090/TA0090 1 x SQ0090 1 x TA0090 2 x SQ0090 SQ0180/TA0180 2 x TA0090 3 x SQ0090 SQ0270/TA0270 1215 3 x TA0090...

  • Page 76: Table 2-19: Phase Output Current And Power Specifications For Xvc721 Option -Three Phase

    Sequoia / Tahoe Series User Manual California Instruments Output AC mode Output Current, Rated Power (kVA) Model No of chassis (Per Phase) AC mode RMS (A) Peak (A) 1 x SQ0090 SQ0090/TA0090 41.6 124.7 1 x TA0090 2 x SQ0090 SQ0180/TA0180 83.1 249.4...

  • Page 77: Hf Option Specifications

    Sequoia / Tahoe Series User Manual California Instruments Figure 2-5: Output current limit characteristics -XVC option 2.37 HF Option Specifications The HF option extends the maximum available output frequency from 550 Hz to 905 Hz. Some restrictions are in effect at this increased output frequency level. All other specifications of the Sequoia / Tahoe system remain unchanged if this option is installed except as noted in the table below.

  • Page 78: Ehf Option Specifications

    Sequoia / Tahoe Series User Manual California Instruments Figure 2-6: Output voltage limit characteristics -HF option 2.38 EHF Option Specifications The EHF option extends the maximum available output frequency from 905 Hz to 1500 Hz. Some restrictions are in effect at this increased output frequency level. All other specifications of the SEQUOIA/TAHOE system remain unchanged if this option is installed except as noted in the table below.

  • Page 79: Figure 2-7: Output Voltage Limit Characteristics - Ehf Option

    Sequoia / Tahoe Series User Manual California Instruments Maximum voltage at 1500 Hz is 159 Vrms; Low Voltage Range Maximum frequency at 166 Vrms is 1450 Hz, See Figure 2-7. Note: If the voltage or frequency settings shown here are exceeded for any length of time (> 1 sec), the SEQUOIA/TAHOE may shut down generating an over temperature fault to protect itself.
  • Page 80 Sequoia / Tahoe Series User Manual California Instruments This page is intentionally left blank. M447352-01 REV-B...

  • Page 81: Unpacking And Installation

    1. Sequoia / Tahoe Series User Manual (P/N M447352-01) 2. Sequoia Series Programming Manual (P/N M447353-01) 3. Tahoe Series Programming Manual (P/N M447354-01) Note: If any of these items are missing, contact AMETEK Customer Service Department at 858-458-0223 (local) or 1-800-733-5427 (toll free). Power Requirements The Sequoia / Tahoe Series Power Source has been designed to operate from a three-phase, three wire (Wye or Delta) AC input line.

  • Page 82: Figure 3-1: The Sequoia / Tahoe Power Sources

    Sequoia / Tahoe Series User Manual California Instruments Figure 3-1: The Sequoia / Tahoe Power Sources CAUTION! Do not connect 400 V or 480 V into a unit set for 208 V or 230 V unit, the result will be a severely damaged unit. Always check the input rating on the model number tag before connecting AC input power.

  • Page 83: Mechanical Installation

    Sequoia / Tahoe Series User Manual California Instruments Mechanical Installation The Sequoia/Tahoe Series are self-contained power sources designed to be used as standalone units on a solid surface. They are fan-cooled, with air drawn in from the front and exhausted at the rear. Each unit must have a 12"...

  • Page 84: Figure 3-3: Rear Panel Input/Output Protective Cover Installation -For Sq/Ta 0022, 0030, 0045 Output Power Models

    Sequoia / Tahoe Series User Manual California Instruments Figure 3-3: Rear Panel Input/Output Protective Cover Installation –For SQ/TA 0022, 0030, 0045 Output Power Models Figure 3-4: Rear Panel Input/Output Protective Cover Installation – SQ/TA 0090 M447352-01 REV-B...

  • Page 85: Overall Dimensions For Installation

    Sequoia / Tahoe Series User Manual California Instruments 3.4.2 Overall Dimensions for Installation Figure 3-5: Overall Dimension Drawing of Standalone Model – For SQ/TA 0022, 0030, 0045 Output Power Models M447352-01 REV-B...

  • Page 86: Figure 3-6: Overall Dimension Drawing Of Standalone Model - Sq/Ta 0090

    Sequoia / Tahoe Series User Manual California Instruments Figure 3-6: Overall Dimension Drawing of Standalone Model – SQ/TA 0090 M447352-01 REV-B...

  • Page 87: Figure 3-7: Overall Dimension Drawing Of Standalone Model - Sq/Ta 0090 With Chill Door Option

    Sequoia / Tahoe Series User Manual California Instruments Figure 3-7: Overall Dimension Drawing of Standalone Model – SQ/TA 0090 with Chill door option M447352-01 REV-B...

  • Page 88: Figure 3-8: Air Inlet And Air Outlet Location And Rare View Drawings For

    Sequoia / Tahoe Series User Manual California Instruments Figure 3-8: Air Inlet and Air Outlet Location and Rare view Drawings for SQ/TA 0090 with Chill Door Assembly model M447352-01 REV-B...

  • Page 89: Ac Input Connections And Wiring

    Sequoia / Tahoe Series User Manual California Instruments Figure 3-9: Overall Dimension Drawing of Standalone Model – SQ/TA 0015 AC Input Connections and Wiring A three-phase Delta or Wye AC input voltage with sufficient amperage is required to power the Sequoia/Tahoe Series.
  • Page 90 Sequoia / Tahoe Series User Manual California Instruments CAUTION! AC input wiring and connections must comply with local electrical safety codes. Always consult a qualified electrician before installing any Sequoia/Tahoe system. The input terminal block is located on the lower end of the rear of the Sequoia / Tahoe 22.5kVA to 45kVA chassis and for Sequoia / Tahoe 90 kVA chassis the input terminal block is located on the lower left end.

  • Page 91: Figure 3-10: Location Of Ac Input Block And Chassis Ground Connection

    Sequoia / Tahoe Series User Manual California Instruments Figure 3-10: Location of AC Input Block and Chassis Ground Connection – For SQ/TA 0022, 0030, 0045 Output Power Models M447352-01 REV-B...

  • Page 92: Figure 3-11: Location Of Ac Input Block And Chassis Ground Connection - Sq/Ta 0090

    Sequoia / Tahoe Series User Manual California Instruments Figure 3-11: Location of AC Input Block and Chassis Ground Connection – SQ/TA 0090 Name Type Range Function 10% - 208 V 10% - 230 V 10% - 380 V AC INPUT L1 AC Input Line-1 input from utility AC mains 10%...

  • Page 93: Table 3-2: Ac Input Connector Type - For Sq/Ta 0022, 0030, 0045 Output Power Models

    Sequoia / Tahoe Series User Manual California Instruments Connector Type, and Data Manufacturer Name: MARATHON SPECIAL PRODUCTS Manufacturer; part number: 1323574; AC Input tightening torque: 4 Nm (35.4 lb.-in); wire Cross Section: 2.5 mm , min (14 AWG) to 6 mm , max (10 AWG);...
  • Page 94 Sequoia / Tahoe Series User Manual California Instruments WARNING! The front panel POWER switch of the Sequoia/Tahoe Series power source does not disconnect the AC input line from the unit. Ensure that an appropriately rated safety disconnect device is included in the installation to isolate the AC input when opened. This device can be a switch or circuit breaker, and must be positioned near the unit, within the operator's reach, and clearly labeled as the disconnection device.

  • Page 95: Figure 3-12: Ac Input Connection Diagram - For Sq/Ta 0022, 0030, 0045 Output Power Models

    Sequoia / Tahoe Series User Manual California Instruments Figure 3-12: AC Input Connection Diagram – For SQ/TA 0022, 0030, 0045 Output Power Models M447352-01 REV-B...

  • Page 96: Figure 3-13: Ac Input Connection Diagram - Sq/Ta 0090

    Sequoia / Tahoe Series User Manual California Instruments Figure 3-13: AC Input Connection Diagram – SQ/TA 0090 The input power cables, and protective circuit breaker must be rated to handle the input current and voltage of the power source and must comply with local electrical codes. Consult a qualified electrician before installation.

  • Page 97: Table 3-4: Suggested Input Wiring Sizes For Each Sequoia / Tahoe Cabinet

    Sequoia / Tahoe Series User Manual California Instruments Size Temperature Rating of Copper Conductor 60°C 75°C 90°C Types: RHW, THHW, THW, Types: TBS SA, SIS, FEP, Types: TW, UF THWN, XHHW, USE, ZW FEPB, MI, RHH, THHN, THHW, XHH, XHHW Current Rating, A(RMS) −...

  • Page 98: Ac On/Off Push Button

    Sequoia / Tahoe Series User Manual California Instruments 0.0098 1.67 0.0078 1.52 0.0062 1.40 0000 0.0049 1.27 Table 3-5: Wire Resistance and Voltage Drop CAUTION! Capacitors in the power source may retain a hazardous electrical charge even after the power source has been disconnected from the mains supply. Allow the capacitors to discharge to a safe voltage before touching any exposed pins of the mains supply connectors.

  • Page 99: Output Connections

    Sequoia / Tahoe Series User Manual California Instruments Output Connections 3.7.1 Output Wiring The output terminal blocks, TB1A and TB1B, are located at the rear of the unit (Refer to Figure 3-16 for details). Three-phase output line connections are made to terminal block TB1A, with the phase outputs labeled A, B, and C.

  • Page 100: Figure 3-15: External Sense Connector

    Sequoia / Tahoe Series User Manual California Instruments Figure 3-15: External sense Connector CAUTION! The output of the power source is isolated from the input line and floating with respect to chassis ground. If needed, either side (HI or LO) may be grounded. If the UUT (Unit Under Test) changes frequently, consider using an external quick disconnect system to avoid powering down the UUT and removing the rear covers.

  • Page 101: Table 3-6: Suggested Output Wiring Sizes For Each Sequoia / Tahoe Cabinet

    Sequoia / Tahoe Series User Manual California Instruments Size Temperature Rating of Copper Conductor 60°C 75°C 90°C Types: TW, UF Types: RHW, THHW, THW, Types: TBS SA, SIS, FEP, FEPB, MI, THWN, XHHW, USE, ZW RHH, THHN, THHW, XHH, XHHW Current Rating, A(RMS) −...

  • Page 102: Output Terminal Blocks

    Sequoia / Tahoe Series User Manual California Instruments 0000 0.0049 1.27 Table 3-7: Wire Resistance and Voltage Drop CAUTION! When the unit is operating in DC mode, all three-phase output return current will flow through the neutral wire in TB1B. Therefore, use appropriately sized wire gauges to handle the return current.

  • Page 103: Figure 3-16: Location Of Output Terminals - For Sq/Ta 0022, 0030, 0045 Output Power Models

    Sequoia / Tahoe Series User Manual California Instruments block TB1B only provides the output neutral connection. In three-phase mode, phase A, B, and C outputs are provided through terminals A, B and C of TB1A, respectively. Connector Terminal Mode Output A 3 Phase Phase A...

  • Page 104: Figure 3-17: Ac Output Connector Locations Sq/Ta 0090

    Sequoia / Tahoe Series User Manual California Instruments Figure 3-17: AC Output Connector Locations SQ/TA 0090 Refer to Figure 3-16 for a view of the connector, Table 3-10 for the pinout and functions, and Table 3-11 for the connector type for three phase output terminal block. Name Type Range...

  • Page 105: Table 3-12: Ac/Dc Three Phase - Sq0090

    Sequoia / Tahoe Series User Manual California Instruments Refer to Figure 3-14 for a view of AC Output Connector Locations for SQ/TA 0090, Table 3-10 for AC/DC Three Phase Output Connector Pinout, and Table 3-12: AC/DC Three phase – SQ0090 for the connector type for three phase output terminal block.

  • Page 106: Single Phase Mode Output Wiring Diagram

    Sequoia / Tahoe Series User Manual California Instruments Connector Type and Data Manufacturer Name: MARATHON SPECIAL PRODUCTS; manufacturer part number: 1452129; wire stripping length: 27 mm (1 / 6”); AC/DC Output tightening torque: 3.4 – 4.5 Nm (30 - 40 lb.-in); wire cross section: 16 mm , min (6 AWG) to 18.25 mm , max (5.5 AWG).

  • Page 107: Figure 3-18: Single Phase Output Wiring - For Sq/Ta 0022, 0030, 0045 Output Power Models

    Sequoia / Tahoe Series User Manual California Instruments Figure 3-18: Single Phase Output Wiring – For SQ/TA 0022, 0030, 0045 Output Power Models M447352-01 REV-B...

  • Page 108: Figure 3-19: Single Phase Output Wiring - Sq/Ta 0090

    Sequoia / Tahoe Series User Manual California Instruments Figure 3-19: Single Phase Output Wiring – SQ/TA 0090 M447352-01 REV-B...

  • Page 109: Three Phase Mode Output Wiring Diagram

    Sequoia / Tahoe Series User Manual California Instruments 3.7.4 Three Phase mode Output Wiring Diagram The Figure 3-20 and Figure 3-21 shows the required output connections for a three-phase mode output configuration (rear-view perspective). Refer to section 3.7.3 for the single-phase mode. Always disconnect all input power feeding this chassis before removing the rear panel cover that provides access to the input and output terminal connections.

  • Page 110: Figure 3-21: Three Phase Output Wiring- Sq/Ta 0090

    Sequoia / Tahoe Series User Manual California Instruments Figure 3-21: Three Phase Output Wiring– SQ/TA 0090 WARNING In Electronic load three-phase mode of operation, A Neutral connection is mandatory. Neutral from the output of UUT must be connected to the output neutral of the Sequoia.

  • Page 111: Connectors - Rear Panel

    Sequoia / Tahoe Series User Manual California Instruments Connectors - Rear Panel Interface connectors are located along the top rear covers. These connectors are in a recessed area to protect them from shipment damage, refer to Figure 3-22. Figure 3-22: Rear Panel Connectors 3.8.1 System Interface WARNING!

  • Page 112: Bnc Connectors

    Sequoia / Tahoe Series User Manual California Instruments Connector Type Leader High-density, 37-socket, receptacle (female) Subminiature-D. Follower High-density, 37-socket, receptacle (female) Subminiature-D. Table 3-17: External Leader/Follower System Interface Connector Type Function Characteristics Control signal interface on Leader unit (or other Follower units if more than two units comprise the multi-phase / Leader Interface parallel group) going to Follower unit for multi-chassis...

  • Page 113: External I/O Control Signal Connector

    Sequoia / Tahoe Series User Manual California Instruments Signal outputs for Leader Clock and Logic signals used in synchronizing two or more AC sources; logic level, TTL-compatible; rear panel BNC connector; LKM (Option) safety isolation SELV-rated, referenced to chassis. Note: SYNC input is not supported in SINK-Electronic load operating mode.

  • Page 114: Table 3-22: External Input/Output Control Functions

    Sequoia / Tahoe Series User Manual California Instruments Signal input for external trigger for execution of programmed value; logic level, TTL-compatible; Trigger Input Signal return common to signals, Trigger input, Synchronization Clock and Remote Inhibit; safety isolation SELV-rated. Signal input for external square wave clock to control the output frequency and phase of the waveform generated by the internal generator;...

  • Page 115: Table 3-23: External Input/ Output Control Connector Pinout

    Sequoia / Tahoe Series User Manual California Instruments Pin # Name Type Range Function Isolated signal return terminal for signals from Pin-2 to ISO_COM Return Return Pin-15. / Common Ground Isolated signal for synchronization of the output to a SYNC_HIGH 0-5 VDC Digital Input logic-high signal transition;...

  • Page 116: External Analog Control Signal Connector

    Sequoia / Tahoe Series User Manual California Instruments 3.8.4 External Analog Control Signal Connector The External Analog connector, EXT ANLG, is located on the rear panel. The Figure 3-25 shows the rear panel view of the connector, Table 3-24 lists the connector type. Table 3-25 shows the functions and Table 3-26 shows the Analog Interface Connector.

  • Page 117: Table 3-25: External Analog Control Functions

    Sequoia / Tahoe Series User Manual California Instruments Signal outputs for each output phase for monitoring the waveform of the command signal of Isolated Output Voltage the output amplifier; Monitor Outputs 0-7.07 Vrms signal range for zero to full-scale output voltage. Signal outputs for each output phase for monitoring the waveform of the command signal of Isolated Output the output amplifier;...

  • Page 118: System Relay

    Sequoia / Tahoe Series User Manual California Instruments 3.8.5 System Relay A single row six pole terminal block (Figure 3-26) is located on the rear panel for remote control of Leader/Auxiliary configurations and Emergency Stop. FOLLOWER and FCOM are used to remotely control the system's configuration for Leader or Follower operation.

  • Page 119: Figure 3-27: Front Panel Of The Follower Unit

    Sequoia / Tahoe Series User Manual California Instruments 3.8.6.1 Multi-Phase System The connections to set up a multi-phase group of units requires the output lines, PHASE-A, PHASE-B, PHASE-C, and RTN to be connected independently from each output of a unit to the load. If the remote sense is used, each unit must have it connected to the phase of the load at the point where precise regulation of the output voltage is desired.

  • Page 120: Figure 3-28: Estop Configuration For Parallel Mode Operation

    Sequoia. Damage to the Sequoia will result if the Neutral is open. E-STOP Configuration for Parallel Mode Operation: Connect the ESTOP system cable (AMETEK P/N 5441323-01R/02R) to the system relay terminal block between parallel systems, as shown in the diagram refer to Figure 3-28, when F/G units are connected in the Leader/Follower configuration.

  • Page 121: Figure 3-29: Connections For 3-Phase Parallel Group Between Two Chassis

    Sequoia / Tahoe Series User Manual California Instruments Figure 3-29: Connections for 3-Phase Parallel Group Between Two Chassis – For SQ/TA 0022, 0030, 0045 Output Power Models M447352-01 REV-B...

  • Page 122: Figure 3-30: Connections For 3-Phase Parallel Group Between Two Chassis - Sq/Ta 0090

    Sequoia / Tahoe Series User Manual California Instruments Figure 3-30: Connections for 3-Phase Parallel Group Between Two Chassis – SQ/TA 0090 M447352-01 REV-B...

  • Page 123: Figure 3-31: Connections For 3-Phase Parallel Group Between Three Chassis

    Sequoia / Tahoe Series User Manual California Instruments Figure 3-31: Connections for 3-Phase Parallel Group Between Three Chassis – For SQ/TA 0022, 0030, 0045 Output Power Models M447352-01 REV-B...

  • Page 124: Figure 3-32: : Connections For 3-Phase Leader/Auxiliary Multi-Phase Group

    Sequoia / Tahoe Series User Manual California Instruments Figure 3-32: : Connections for 3-Phase Leader/Auxiliary Multi-Phase Group – For SQ/TA 0022, 0030, 0045 Output Power Models M447352-01 REV-B...

  • Page 125: Figure 3-33: Connections For 3-Phase Leader/Auxiliary Multi-Phase Group - Sq/Ta 0090

    Sequoia / Tahoe Series User Manual California Instruments Figure 3-33: Connections for 3-Phase Leader/Auxiliary Multi-Phase Group – SQ/TA 0090 M447352-01 REV-B...

  • Page 126: External Sense Connector

    Table 3-30 for pin descriptions. The power source functions as Data Circuit-terminating Equipment (DCE). The cable connecting to the Data Terminal Equipment (DTE) should be straight-through (one-to- one contact connections). For EMC considerations a ferrite core can be added to the cable AMETEK P/N: 991-642-28, Manufacturer P/N: CS28B0642.

  • Page 127: Usb Interface

    Figure 3-35 for view of connector, Table 3-31 for the connector type and Table 3-32 for pin descriptions. A standard USB cable between the Asterion Series power source and a computer should be used. For EMC considerations a ferrite core can be added to the cable AMETEK P/N: 991-642-28, Manufacturer P/N: CS28B0642.

  • Page 128: Lan Interface

    The MAC Address (Media Access Control) of the Ethernet port is printed on a label on the chassis of the power source. For EMC considerations a ferrite core can be added to the cable AMETEK P/N: 991-642-28, Manufacturer P/N: CS28B0642.

  • Page 129: Figure 3-37: Gpib Interface Connector

    Sequoia / Tahoe Series User Manual California Instruments Figure 3-37: GPIB interface Connector Connector Type PCB D-Sub Connectors, Receptacle, Cable-to-Board, 24 GPIB Interface Position TE Connectivity P/N: 5554923-1 Table 3-35: GPIB Interface Connector Type Pin # GPIB Signal Description DIO1 Data Input/ Output bit DIO2 Data Input/ Output bit...

  • Page 130: Clock And Lock Connectors (Optional)

    Sequoia / Tahoe Series User Manual California Instruments Clock and Lock Connectors (Optional) The connectors for the Clock signal, CLOCK, and Lock signal, LOCK, are BNC-type located on the rear panel; refer to Figure 3-38 for view of connectors and Table 3-37 for descriptions. These connectors are only available with the LKM or LKS options.

  • Page 131: Table 3-37: External Clock/Lock Interface Characteristics (Option)

    Sequoia / Tahoe Series User Manual California Instruments Function Characteristics Signal outputs in Leader unit for Clock and Lock that are used to synchronize two or more LKM (Option) sources; CLOCK sets the frequency, while LOCK sets the phase; logic level, TTL-compatible; individual rear panel BNC connectors for each signal;...

  • Page 132: Figure 3-40: Functional Test Setup

    Sequoia / Tahoe Series User Manual California Instruments programmed differently. If only one phase is loaded, current and power will be displayed only for the loaded phase. In the unlikely event the power source does not pass the functional test, refer to the calibration procedure in the manual.

  • Page 133: Operation

    Sequoia / Tahoe Series User Manual California Instruments 4. OPERATION The Sequoia/Tahoe Series power supply offers extensive functionality and programmability through the front panel, remote digital interface, and remote analog/digital control interface. The front panel features a graphical touch-screen display with a menu-driven interface for easy operation and quick access to advanced functions.

  • Page 134: Basic Output Programming

    SCPI commands (refer to the Sequoia Series Programming Manual P/N M447353-01 and Tahoe Series Programming Manual P/N M447354-01) or the Sequoia / Tahoe Virtual Panels GUI; refer to AMETEK PPD website, www.programmablepower.com, to download the latest version.

  • Page 135: Grid Simulator Mode

    Sequoia / Tahoe Series User Manual California Instruments (Source Mode). 14. Program the output current to 50% of the full-scale output current and verify that the output voltage of each phase is reduced from the setpoint, while the output current is regulated to its setpoint. 15.

  • Page 136: Figure 4-2: Grid Simulator Mode

    SCPI commands (refer to the Sequoia Series Programming Manual P/N M447353-01) or the Sequoia Virtual Panels GUI; refer to AMETEK PPD website, www.programmablepower.com, to download the latest version.
  • Page 137 Sequoia / Tahoe Series User Manual California Instruments 4.1.4.4 Basic Functional Test (Source and Grid Simulator Mode) WARNING! When performing the functional tests, exercise appropriate care to protect against hazardous voltages that are present on the input and output. A basic functional test of the power source can be performed with the following steps: 1.

  • Page 138: Electronic Load Mode

    Sequoia / Tahoe Series User Manual California Instruments 10. Program the required output parameters such as output voltage and regenerative current limit from the DASHBOARD screen for the model being tested. 11. Tapping the OUTPUT switch button would turn on the OUTPUT LED when the output is on. 12.

  • Page 139: Figure 4-3: Electronic Load Mode

    Sequoia / Tahoe Series User Manual California Instruments Figure 4-3: Electronic load Mode WARNING! In Electronic load three-phase mode of operation, A Neutral connection is mandatory. Neutral from the output of UUT must be connected to the output neutral of the Sequoia. Damage to the Sequoia will result if the Neutral is open.
  • Page 140 SCPI commands. Refer to the Sequoia Series Programming Manual P/N M447353-01) or the Sequoia Virtual Panels GUI; refer to AMETEK PPD website, www.programmablepower.com, to download the latest version. 4.1.5.3...
  • Page 141 Sequoia / Tahoe Series User Manual California Instruments 4. If not, navigate to the operating mode screen and press the SINK-Electronic load button. 5. Upon pressing the SINK-Electronic load button, the programming modes will be displayed that are available for the Electronic load operating mode. Refer to section 5.6. •...
  • Page 142 Sequoia / Tahoe Series User Manual California Instruments 13. Synchronize the Sequoia with the UUT output by pressing the Sync button from the front panel dashboard screen, refer to the below image. 14. The sync button will be highlighted once the synchronization has happened or else an error message will be displayed with the text “Sync Setting Error”.
  • Page 143 Sequoia / Tahoe Series User Manual California Instruments Steps to perform the DC mode Synchronization: 1. Connect UUT output to the output of the Sequoia. Power up both units. 2. Set the Sequoia to the required range and enable the output of UUT. 3.
  • Page 144 Sequoia / Tahoe Series User Manual California Instruments 4. Verify that the front panel display lights up. After several seconds, the display should show the DASHBOARD Screen Top-Level Menu or the Default screen; refer to Section 5.7.3 for the description of menus. 5.

  • Page 145: External I/O Control Signal Connector

    Sequoia / Tahoe Series User Manual California Instruments 7. Set the sync voltage, sync frequency, and sync phase to the Sequoia unit and perform synchronization (refer to section 4.1.5.1 ). 8. Make the Inductance and capacitance value to “NC, set the Resistance value through the front panel dashboard screen, and press apply the button refer to the below image: R = 150V / 50% of the Rated current 9.

  • Page 146: Figure 4-4: External Input/Output Control Connector

    Sequoia / Tahoe Series User Manual California Instruments Figure 4-4: External Input/Output Control Connector Pin # Name Type Range Function Isolated signal return / Common ground terminal for Pins 4, 5, 11, 12, ISO_COM Return Return 13, and 14. Digital Isolated signal for synchronization of the output to a logic-high signal SYNC_HIGH 0-5 V...

  • Page 147: External Synchronization

    Sequoia / Tahoe Series User Manual California Instruments 4.2.1 External Synchronization An external Synchronization Signal is given to pin-2 (SYNC_HIGH) and pin-3 (SYNC_LOW) present in the External I/O Control Signal 15-pin connector available on the rear panel; refer to Table 4-1 for pinout details. Applying an external square waveform of the range between 0 V to 5 V with desired frequency on SYNC_HIGH and SYNC_LOW pins will allow the user to control the output frequency and phase of the waveform generated by the internal generator;...

  • Page 148: Trigger In Function

    Sequoia / Tahoe Series User Manual California Instruments The Remote Inhibit output mode state is saved at power-down. The factory default state is LIVE. Figure 4-6: Remote Inhibit Pinout Diagram 4.2.3 Trigger IN Function There are two types of user-selectable Trigger IN functions: Internal and External. This can be selected from the front panel Transients menu, refer to Section 5.7.6.

  • Page 149: Output On/Off Status

    Sequoia / Tahoe Series User Manual California Instruments In the default configuration, the signal reports the summary bit that is the logic-OR of the Questionable Status Register outputs for the following events: a) HV BUS OV fault: Overvoltage in HVDC BUS b) Amplifier fault: Inverter Overcurrent Fault c) Overtemperature fault: Inverter Over temperature d) Output overvoltage fault...

  • Page 150: Figure 4-9: Output On/Off Status Pin-Out Diagram

    Sequoia / Tahoe Series User Manual California Instruments Figure 4-9: Output On/Off Status Pin-out Diagram M447352-01 REV-B...

  • Page 151: External Analog Modulation Of Output Voltage (Source And Grid-Simulator Mode)

    Sequoia / Tahoe Series User Manual California Instruments 4.2.6 External Analog Modulation of Output Voltage (Source and Grid-Simulator MODE) Note: This function is available in both the SEQUOIA and TAHOE series power supply, and for the SEQUOIA series, this function is applicable only in SOURCE and Grid-Simulator Modes of operation. Also, the external modulation signal is limited to a maximum peak of 485 V so that the signal peak would not go beyond 485 V in the HIGH range and 242.5 V in the LOW range.

  • Page 152: External Analog Control Signal Connector

    Sequoia / Tahoe Series User Manual California Instruments Figure 4-12: Modulation Reference Signal Pinout diagram for Phase C External Analog Control Signal Connector The Sequoia / Tahoe power supply is provided with an External Analog Control Signal 15-pin connector on the rear panel.

  • Page 153: External Analog Programming Of Output Voltage Waveform (Source And Grid-Simulator Mode)1 2

    Sequoia / Tahoe Series User Manual California Instruments Signal outputs for output phase A for Output Current Analog ±10 V monitoring the waveform of the command Monitor - Phase A Output signal of the output amplifier. Signal outputs for output phase B for Output Current Analog ±10 V...

  • Page 154: Figure 4-14: External Analog Programming - Reference Ac Waveform For Phase A

    Sequoia / Tahoe Series User Manual California Instruments Figure 4-14: External Analog Programming – Reference AC waveform for Phase A Figure 4-15: External Analog Programming – Reference AC waveform for Phase B Figure 4-16: External Analog Programming – Reference AC waveform for Phase C M447352-01 REV-B...

  • Page 155: External Analog Programming Of Output Voltage Amplitude (Source And Grid-Simulator Mode)1 2

    Sequoia / Tahoe Series User Manual California Instruments 4.3.2 External Analog Programming of Output Voltage Amplitude (Source and Grid-Simulator Mode) Note: This function is available in both the SEQUOIA and TAHOE series power supply and for the SEQUOIA series, this function is applicable only in SOURCE and Grid-Simulator Modes of operation. This is an alternative method where the user can program the amplitude of output voltage based on the DC voltage provided to the External Reference Signal pins.

  • Page 156: External Analog Programming Of Output Current Amplitude (Electronic Load - Current Programming Mode)

    Sequoia / Tahoe Series User Manual California Instruments Figure 4-18: External Analog Programming – Reference DC Source for Phase B Figure 4-19: External Analog Programming – Reference DC Source for Phase C External Analog Programming of Output Current Amplitude (Electronic load – Current 4.3.3 programming Mode) Note: This function is available only for Electronic load –...

  • Page 157: Output Voltage Monitor (Vmon)

    Sequoia / Tahoe Series User Manual California Instruments When the UUT output voltage is negative, the External DC Voltage must range from 0 to -10 VDC. • Pin 1 (External Reference Signal – Phase A) and Pin 4 (Return / ISO_COM) are to be connected to the DC source to vary the output voltage for Phase A, refer to Figure 4-17.

  • Page 158: Figure 4-21: Output Voltage Monitor Pinout Diagram For Phase B

    Sequoia / Tahoe Series User Manual California Instruments Figure 4-21: Output Voltage Monitor Pinout Diagram for Phase B Figure 4-22: Output Voltage Monitor Pinout Diagram for Phase C M447352-01 REV-B...

  • Page 159: Output Current Monitor (Imon)

    Sequoia / Tahoe Series User Manual California Instruments 4.3.5 Output Current Monitor (IMON) Current Monitor provides functionality to monitor the scaled-down output current of the unit; refer to Figure 4-13 and Table 4-2 for pin-out details. The scaled-down Output current of each phase can be monitored between the IMON terminals of the external analog control signal connector (Pin-6: IMON for Phase A, Pin- 7: IMON for Phase B, and Pin-8: IMON for Phase C) and Pin-9 (Return / ISO_COM).

  • Page 160: Figure 4-24: Output Current Monitor Pinout Diagram For Phase B

    Sequoia / Tahoe Series User Manual California Instruments Figure 4-24: Output Current Monitor Pinout Diagram for Phase B Figure 4-25: Output Current Monitor Pinout Diagram for Phase C M447352-01 REV-B...

  • Page 161: Front Panel Operation

    Sequoia / Tahoe Series User Manual California Instruments 5. FRONT PANEL OPERATION Figure 5-1 shows a view of the front panel. Refer to Table 5-2 for functional descriptions of the Enhanced front panel. Figure 5-1: Front Panel Front Panel Controls and Indicators Item Reference Functional Description...

  • Page 162: Front Panel Display Navigation

    Sequoia / Tahoe Series User Manual California Instruments All output phases of the power source are presently in Constant-Voltage mode, and the output voltage is regulated. LXI status annunciation. A fault condition has occurred; the output is shut down, the isolation relay is open, FAULT and the output voltage is programmed to zero.
  • Page 163 Sequoia / Tahoe Series User Manual California Instruments 8. Navigate to the CURRENT menu in the OUTPUT PROGRAM screen and adjust the output current value. 9. Navigate to the FREQUENCY menu in the OUTPUT PROGRAM screen and adjust the output frequency value.

  • Page 164: Front Panel Touch-Screen Display

    Sequoia / Tahoe Series User Manual California Instruments SYNCED with a green color background. 8. The output is turned on with the front panel OUTPUT switch. Electronic load Mode: Power Programming (Applicable only for Sequoia series) 1. Navigate to the PHASE NUMBER menu in the CONFIGURATION screen and select the output phase number: either One-Phase or Three-Phase.

  • Page 165: Figure 5-2: Banner Screen

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-2: Banner Screen Note: Operating modes can be changed from the Operating mode option. Refer to section 5.6. Navigating through the various menus is done using the touch-screen display or the rotary encoder. Tapping the display screen or tapping with the encoder on any menu or function that is highlighted (active) will enter that menu or execute that function.

  • Page 166: Touch-Screen Numeric Keypad

    Sequoia / Tahoe Series User Manual California Instruments Tapping the selection-field box, selects that parameter for adjustment, and the screen changes to the numeric keypad that allows value entry; refer to Figure 5-6. Figure 5-4: DASHBOARD Screen Menu with Voltage Selection-Field Active When the power source is configured for 3-Phase output, each phase has individual settings.

  • Page 167: Rotary Encoder

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-6: Touch-Screen Numeric Keypad 5.4.2 Rotary Encoder The rotary encoder provides a secondary way to navigate the display. It is used to select functions, change parameter values, and perform setups. It can be used to move between menu screens and between editable items within an individual menu screen.

  • Page 168: Figure 5-8: Output Program Menu

    Sequoia / Tahoe Series User Manual California Instruments selection field (refer to Figure 5-8). If a parameter had been selected whose value can be adjusted, and the encoder switch is depressed, a screen will be displayed with a parameter selection-field highlighted that has a value entry window (refer to Figure 5-74).

  • Page 169: Front Panel Display Top-Level Menu

    Sequoia / Tahoe Series User Manual California Instruments 3-Phase with Phase-A, B, and C selected 3-Phase unit in 1-Phase mode Figure 5-9: Highlighted Voltage Selection Field with Value Window The rotary encoder is also used along with the numeric keypad to enter values. After selecting a parameter using the touch-screen, the numeric keypad will be displayed;...

  • Page 170: Operating Mode Screen

    Sequoia / Tahoe Series User Manual California Instruments Top-Level Screen Menu Menu Description Provides setting and measurement of output parameters: voltage, current, DASHBOARD frequency, and voltage range. Provides an automatic transition to the Default screen. Provides setting of phase number, output mode of operation, individual output OUTPUT PROGRAM parameters, mode of regulation, current limit, and output waveform selection Provides measurement of output parameters and harmonic distortion, advanced...

  • Page 171: Figure 5-11: Source Mode

    Sequoia / Tahoe Series User Manual California Instruments The following sub-menus are available in the PROTECTION menu: Entry Description Source Mode Sets the power supply in source mode. Figure 5-11: Source Mode SINK-Grid Sim Sets the power supply in grid simulator mode. In Grid Simulator Mode Sequoia regulates the output voltage to the user-set value and works as the grid to UUT.

  • Page 172: Figure 5-13: Electronic Load - Current Programming

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-13: Electronic load – Current Programming RMS Power programming: The user can program the Active power, and the Reactive Power required as a load for the UUT. Figure 5-14: Electronic load – Power Programming Parallel RLC programming: The user can program the Capacitance required as a load Resistance, Inductance and...

  • Page 173: Home Screen Top-Level Menu - (Source Mode)

    Sequoia / Tahoe Series User Manual California Instruments Home Screen Top-Level Menu - (Source Mode) 5.7.1 Banner Screen Figure 5-16: Banner Screen for Source Mode – SEQUOIA Figure 5-17: Banner Screen – TAHOE Series 5.7.2 HOME Screen Figure 5-18: HOME Screen for Source Mode – SEQUOIA M447352-01 REV-B...

  • Page 174: Dashboard Screen Top-Level Menu

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-19: HOME Screen – TAHOE Series 5.7.3 Dashboard Screen Top-Level Menu The DASHBOARD screen top-level menu is used to change output parameters and simultaneously view output measurements. The most used output parameters are in the DASHBOARD screen menu. The DASHBOARD screen is the default menu that is displayed after powering on.

  • Page 175: Figure 5-20: Dashboard Screen Top-Level Menu For Source Mode

    Sequoia / Tahoe Series User Manual California Instruments 1-Phase Mode Figure 5-20: DASHBOARD Screen Top-Level Menu for Source Mode The following selections are available in the DASHBOARD screen top-level menu. Functions that accept a numeric value require that the value be within the allowed range, otherwise, an error will be generated, and the value will not be accepted.

  • Page 176: Real-Time Parameter Adjustment

    Sequoia / Tahoe Series User Manual California Instruments Measure VOLTAGE Displays the true RMS value of the output voltage measured at the voltage sense lines (user selectable to be local or remote). In DC-mode only, the voltage is DC voltage including polarity. CURRENT Displays the true RMS value of the output current.

  • Page 177: Figure 5-22: Output Program Screen Top-Level Menu

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-22: OUTPUT PROGRAM Screen Top-Level Menu The following choices are available in the OUTPUT PROGRAM screen top-level menu. Functions that accept a numeric value require that the value be within the allowed range, otherwise, an error will be generated, and the value will not be accepted.

  • Page 178: Figure 5-24: Frequency Settings

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-24: Frequency settings CURRENT LIMIT Programs the output current in RMS value, A(RMS). The default is full-scale for the model. Figure 5-25: Current Limit Settings PHASE Programs the phase angle of the output voltage in a standalone unit operating in a 1-Phase configuration;...

  • Page 179: Transients Screen

    SCPI commands (refer to the Sequoia Series Programming Manual P/N M447353-01 and Tahoe Series Programming Manual P/N M447354-01) or the Sequoia / Tahoe Virtual Panels GUI; refer to AMETEK PPD website, www.programmablepower.com, to download the latest version.

  • Page 180: Figure 5-28: Transients Screen Top-Level Menu

    Sequoia / Tahoe Series User Manual California Instruments The Up-arrow button will return to the previously selected screen menu (in this case the HOME Screen). The HOME button will return to the HOME screen that has the top-level menu for the sub-menu being displayed;...

  • Page 181: Figure 5-30: Transients Settings In Dc Mode

    Sequoia / Tahoe Series User Manual California Instruments The SETTINGS menu has the following fields: Figure 5-30: Transients Settings in DC Mode Entry Description Phase Sets the output phase to which the programming of the transients will be applied. Time Sets the units for the time of the transient step;...

  • Page 182: Figure 5-31: Settings Screen, Trigger Sub-Menu

    Sequoia / Tahoe Series User Manual California Instruments Trig(ger) The present state of the trigger settings is shown in the TRIG field. Tap on the field to open the TRIGGER sub-menu to change settings; refer to Figure 5-31. Figure 5-31: SETTINGS Screen, TRIGGER Sub-Menu The TRIGGER sub-menu has the following fields: Entry Description...

  • Page 183: Figure 5-32: Menu, With Empty Buffer

    Sequoia / Tahoe Series User Manual California Instruments 5.7.6.1 LIST Menu The LIST menu shows the transient list, with sequence numbers that are stored in the transient list buffer Figure 5-32 shows the menu when the buffer is empty. Figure 5-32: Menu, With Empty Buffer Figure 5-33: LIST Menu, With Transient List Entry The LIST menu has the following fields: Entry...

  • Page 184: Figure 5-34: List Menu, Add Sub-Menu

    Sequoia / Tahoe Series User Manual California Instruments 5.7.6.2 ADD Sub-Menu The ADD sub-menu is opened when the ADD function is selected on the LIST screen; refer to Figure 5-34. It allows the selection of the type of transient to be added to the sequence. AC Mode DC Mode Figure 5-34: LIST Menu, ADD Sub-Menu...

  • Page 185: Figure 5-35: Voltage Drop Settings

    Sequoia / Tahoe Series User Manual California Instruments VOLTAGE SWEEP/STEP VOLTAGE SWEEP causes the output voltage to change from the present value to a specified end value at a specified rate of change, while a VOLTAGE STEP causes an instantaneous change in output voltage.

  • Page 186: Figure 5-38: Frequency Sweep/Step Settings

    Sequoia / Tahoe Series User Manual California Instruments at the start of the transient step, or no change in output frequency will occur. Figure 5-38: Frequency Sweep/Step Settings FREQUENCY SURGE/SAG FREQUENCY SURGE and SAG are temporary changes in frequency. The output frequency will change from its present value to a specified value for a specified duration.

  • Page 187: Figure 5-40: Volt/Freq Sweep/Step Settings

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-40: Volt/Freq Sweep/Step Settings VOLT/FREQ SURGE/SAG This transient type combines voltage and frequency changes into a single step. The effect is that of changing the output voltage frequency simultaneously. While this transient programmed as a single transient step, two list entries are required to store this information.

  • Page 188: Figure 5-43: Volt/Freq Delay Settings - Ac Mode

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-43: Volt/Freq Delay Settings – AC Mode Figure 5-42: Volt/Freq Delay Settings – DC Mode M447352-01 REV-B...

  • Page 189: Figure 5-44: List Menu, Voltage Drop Sub-Menu

    Sequoia / Tahoe Series User Manual California Instruments 5.7.6.3 VOLTAGE DROP Sub-Menu The VOLTAGE DROP menu allows programming the output voltage to zero at the maximum slew rate. After the drop time duration, the voltage returns to the previous level. When the transient definition is complete, tap SAVE to store the transient step settings in non-volatile memory and return to the ADD menu.

  • Page 190: Figure 5-45: List Menu, Voltage Sweep/Step Sub-Menu

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-45: LIST Menu, VOLTAGE SWEEP/STEP Sub-Menu The VOLTAGE SWEEP/STEP sub-menu has the following fields: Entry Description T(ime) Sets the time, in seconds or cycles, that it will take for the output voltage to reach the level set in the V(olts) field (end voltage).

  • Page 191: Figure 5-46: List Menu, Voltage Surge/Sag Sub-Menu

    Sequoia / Tahoe Series User Manual California Instruments 5.7.6.5 VOLTAGE SURGE/SAG Sub-Menu The VOLTAGE SURGE/SAG menu allows temporarily changing the voltage amplitude during a transient. The output voltage will change from its present value to a specified value for a specified duration. After this time duration has expired, the output voltage returns to a specified end value.

  • Page 192: Figure 5-47: List Menu, Frequency Sweep/Step Sub-Menu

    Sequoia / Tahoe Series User Manual California Instruments the order of execution of the transient events in a multiple-event transient. Phase Displays the phases that had been selected in the Settings menu. 5.7.6.6 FREQUENCY SWEEP/STEP Sub-Menu The FREQUENCY SWEEP/STEP menu allows changing the frequency during a transient. A frequency sweep is a continual change in amplitude that takes place over a specified period, while during a frequency step, the change occurs at the maximum slew rate.

  • Page 193: Figure 5-48: List Menu, Frequency Surge/Sag Sub-Menu

    Sequoia / Tahoe Series User Manual California Instruments Delay Sets the time duration, in seconds or cycles, that the frequency will stay at the level, F(requency), before the next transient event is executed, or the transient list is completed. Save Completes the transient editing.

  • Page 194: Figure 5-49: List Menu, Volt/Freq Sweep/Step Sub-Menu

    Sequoia / Tahoe Series User Manual California Instruments standard waveforms. The output waveform changes upon entry into each section and remains in effect for the duration of the section. The default waveform is always the SINE (sinewave). Trig(ger) Causes a trigger pulse to be generated for the selected event when LIST is selected for Trig(ger) Out Source in the SETTINGS menu.

  • Page 195: Figure 5-50: List Menu, Volt/Freq Surge/Sag Sub-Menu

    Sequoia / Tahoe Series User Manual California Instruments F(requency) Sets the frequency (Hz) that will be reached after the sweep or step. Rep(ea)t Sets the number of times the sweep/step transient event will be repeated before execution will proceed to the next event or exit the transient list.

  • Page 196: Delay Sub-Menu

    Sequoia / Tahoe Series User Manual California Instruments The VOLT/FREQ SURGE/SAG sub-menu has the following fields: Entry Description T(ime) Sets the time, in seconds or cycles, that the output frequency will dwell at F(requency) and the output voltage to dwell at V(olts). V(olts) Sets the voltage amplitude, in volts, that will be reached during the surge or sag time duration.

  • Page 197: Figure 5-51: List Menu, Delay Sub-Menu

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-51: LIST Menu, DELAY Sub-Menu The VOLT/FREQ sub-menu has the following fields: Entry Description T(ime) Sets the time, in seconds or cycles, that the voltage amplitude and frequency will stay at their existing levels before the next transient event is executed or the transient list is complete.

  • Page 198: Figure 5-52: Run Menu

    Sequoia / Tahoe Series User Manual California Instruments 5.7.6.11 RUN Menu The RUN menu is used to control transient execution; It provides two selections, CONTINUOUS and X TIMES, and START/ABORT functions to begin and stop the execution of a list. Figure 5-52: RUN Menu The RUN menu has the following fields: Entry...

  • Page 199: Configuration Screen

    Sequoia / Tahoe Series User Manual California Instruments 5.7.7 Configuration Screen The CONFIGURATION screen provides a setup of the output mode of operation, power-on states, operation profiles, parameter limits, and selection of clock mode. The top-level menu of the CONFIGURATION screen is shown in Figure 5-53. It can be reached in one of two ways: 1.

  • Page 200: Figure 5-54: Voltage Protection Settings

    Sequoia / Tahoe Series User Manual California Instruments The following sub-menus are available in the CONFIGURATION menu: Entry Description VOLTAGE PROTECTION Programs the Voltage Protection threshold for the output voltage of each output phase. Exceeding the OVP threshold will result in the shutdown of the output, with the output isolation relay opened and the output voltage programmed to zero.

  • Page 201: Mode Setting

    Sequoia Series Programming Manual P/N M447353-01 or Tahoe Series Programming Manual P/N M447354-01 or the Sequoia / Tahoe Virtual Panels GUI; refer to AMETEK PPD website, www.programmablepower.com, to download the latest version. Figure 5-56: Waveform Settings...

  • Page 202: Figure 5-58: Mode Settings

    Sequoia / Tahoe Series User Manual California Instruments in AC and AC+DC modes, and 220/440 VDC in DC mode. The output must be turned off to change this setting. The default is AC. Figure 5-58: Mode Settings REGULATION Selects options for regulation of the output voltage: whether ALC is enabled, and what control action will be performed when the load current reaches the current setpoint.
  • Page 203 Sequoia / Tahoe Series User Manual California Instruments Constant-Voltage/Current-Limit (CV/CL): CV/CL mode will regulate the output voltage to the set value until the load current reaches the current setpoint; after the Delay interval, if the current equals or exceeds the setpoint, a fault condition will be generated, and the output voltage will be programmed to zero and the isolation relay opened.

  • Page 204: Figure 5-60: Dc Offset Settings

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-60: DC Offset Settings PROFILES Selects the operational state of the power source; the default is Profile-0. Up to 15 unique profiles, including transient lists, can be stored; refer to Figure 5-61. CONFIGURATION Menu, PROFILES Sub-Menu.

  • Page 205: Figure 5-62: Profiles Menu, Name Sub-Menu

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-62: PROFILES Menu, NAME Sub-Menu USER F-LIMITS Sets soft limits for the minimum and maximum output frequency to which the unit can be programmed using the front panel or remote digital interface; the default is full-scale. Figure 5-63: User Frequency Limit Settings USER V-LIMITS Sets soft limits for the minimum and maximum output voltage...

  • Page 206: Figure 5-65: User Current Limit Settings

    Sequoia / Tahoe Series User Manual California Instruments USER Curr LIMITS Sets soft limits for the minimum and maximum output current to which the unit can be programmed using the front panel or remote digital interface; the default is full-scale. Figure 5-65: User Current Limit Settings PONS The PONS (Power ON Settings) menus allow setting the...

  • Page 207: Figure 5-66: Configuration Menu, Pons Menu-1/2

    Sequoia / Tahoe Series User Manual California Instruments PONS Menu-2 Figure 5-66: CONFIGURATION Menu, PONS Menu-1/2 The PONS menu has the following fields: Entry Description PONS VOLTAGE PONS menu: Sets the value of the output voltage; the default zero. Figure 5-67: PONS Voltage Settings PONS OVP PONS menu: Programs the PONS Voltage Protection threshold for the output voltage of each output phase.

  • Page 208: Figure 5-68: : Pons Ovp Settings

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-68: : PONS OVP Settings PONS MODE PONS menu: Selects the mode of operation for the output of the power source: either AC only, DC only, or voltage Figure 5-69: PONS Mode Settings AC with a DC offset (AC+DC);...

  • Page 209: Figure 5-71: Pons Current Settings

    Sequoia / Tahoe Series User Manual California Instruments PONS CURRENT PONS menu: Sets the value of the output current; the default full-scale for the model. Figure 5-71: PONS Current Settings PONS FREQUENCY PONS menu: Sets the value of the output frequency; the is 60 Hz.

  • Page 210: Figure 5-73: Pons Phase Settings

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-73: PONS Phase Settings PONS REGULATION Selects either Current-Limit mode (CL), where the output would be shut down when the current reaches the set value, or Constant-Current mode (CC), where the output current would be regulated when it reaches the set value;...

  • Page 211: Figure 5-75: Pons Output Settings

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-75: PONS Output Settings PONS VOLTAGE SENSE PONS menu: Selects the point for the sensing of the output voltage for regulation, either Internal (local, at the rear panel terminals) or External (remote, through the Remote Sense connection to the load);...

  • Page 212: Figure 5-77: Pons Clock Config Settings

    Sequoia / Tahoe Series User Manual California Instruments Auxiliary: Derives synchronization from either the internal waveform generator or the external Clock/Lock interface (with external synchronization, the phase programming resolution is limited to 1 Hz), as selected in the PONS CLOCK MODE menu (either Internal or External);...

  • Page 213: Figure 5-78: Pons Waveform Settings

    Sequoia / Tahoe Series User Manual California Instruments PONS WAVEFORM PONS menu: Selects the type of output waveform, either standard sine, square, or clipped-sine, or one that is user-defined; the default is a sine wave. The clipped-sine waveform has an additional programmable parameter, CLIP % THD, Refer to for information on the use of the menus.

  • Page 214: Clock Mode

    Sequoia / Tahoe Series User Manual California Instruments the external analog inputs for programming the output waveform and amplitude; the default is Internal: Internal: Enables the internal waveform generator using the standard waveforms or one of the user-defined waveforms. External: Enables the external analog interface programming input that sets waveform and amplitude.

  • Page 215: Default Screen

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-82: Clock Mode Settings OUTPUT SENSE Selects the point for the sensing of the output voltage for regulation; the default is external: Internal: Local, at the rear panel terminals. External: Remote, through the Remote Sense connection to the load.

  • Page 216: Home Screen Top-Level Menu - (Grid Simulator Mode)

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-84: Default Screen Settings HOME Screen Top-Level Menu - (Grid Simulator Mode) 5.8.1 Banner Screen Figure 5-85: Banner Screen for Grid Simulator Mode 5.8.2 HOME Screen Figure 5-86: HOME Screen for Grid Simulator Mode M447352-01 REV-B...

  • Page 217: Dashboard Screen Top-Level Menu

    Sequoia / Tahoe Series User Manual California Instruments 5.8.3 Dashboard Screen Top-Level Menu The DASHBOARD screen top-level menu is used to change output parameters and simultaneously view output measurements. The most used output parameters are in the DASHBOARD screen menu. The DASHBOARD screen is the default menu that is displayed after powering on.

  • Page 218: Real-Time Parameter Adjustment

    Sequoia / Tahoe Series User Manual California Instruments for one phase will make the same changes for the other phases. Entry Description Setting VOLTAGE Programs the output voltage in RMS value, Vrms when in AC-mode and DC mode, and the AC component when in (AC+DC) -mode.

  • Page 219: Figure 5-88: Output Program Screen Top-Level Menu

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-88: OUTPUT PROGRAM Screen Top-Level Menu The following choices are available in the OUTPUT PROGRAM screen top-level menu. Functions that accept a numeric value require that the value be within the allowed range, otherwise, an error will be generated, and the value will not be accepted.: Entry Description Settings...

  • Page 220: Figure 5-90: Frequency Settings

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-90: Frequency Settings SOURCE CURRENT Programs the output current in RMS value, A(RMS). The default is full-scale for the model. Figure 5-91: Source Current Settings PHASE Programs the phase angle of the output voltage in a standalone unit operating in a 1-Phase configuration;...

  • Page 221: Figure 5-92: Phase Settings

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-92: Phase Settings REGENERATIVE CURRENT Programs the Regenerative current value, (Amperes). Figure 5-93: Regenerative Current Settings Clear Fault Programs the unit to clear all the faults. This button will be enabled only when fault bit is high and disabled when fault bit is low.

  • Page 222: Transients Screen

    Sequoia / Tahoe Series User Manual California Instruments 5.8.6 Transients Screen Refer to Section 5.7.6. 5.8.7 Configuration Screen The CONFIGURATION screen provides a setup of the output mode of operation, power-on states, operation profiles, parameter limits, and selection of clock mode. The top-level menu of the CONFIGURATION screen is shown in Figure 5-95.

  • Page 223: Voltage Protection

    Sequoia / Tahoe Series User Manual California Instruments The following sub-menus are available in the CONFIGURATION menu: Entry Description REGENERATIVE CONTROL UNDER VOLT Sets the UUT shut-off voltage, Active only if the dFREQ listed below is set to zero. This is the voltage (AC or DC) at which the UUT will shut off.

  • Page 224: Figure 5-97: Ovp Settings

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-97: OVP Settings PHASE NUMBER Programs the output phase configuration: One-Phase or Three-Phase. The default is Three-Phase. Figure 5-98: Phase Number Settings WAVEFORM Selects the waveform for the output voltage: either standard waveforms for sine wave, square wave, clipped-sine wave, or user-defined waveforms;...

  • Page 225: Figure 5-99: Waveform Settings

    PONSetup:WGRoup <n>, through the digital interface. For information on generating user-defined waveforms and their selection, refer to the Sequoia Series Programming Manual P/N M447353-01 or the Sequoia Virtual Panels GUI; refer to AMETEK PPD website, www.programmablepower.com, to download the latest version. Figure 5-99: Waveform Settings RANGE...

  • Page 226: Figure 5-101: Mode Settings

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-101: Mode Settings REGULATION Selects options for regulation of the output voltage: whether ALC is enabled, and what control action will be performed when the load current reaches the current setpoint. The defaults are CV/CL, with a Delay of 0.2 seconds, and ALC on.
  • Page 227 Sequoia / Tahoe Series User Manual California Instruments Constant-Voltage/Current-Limit (CV/CL): CV/CL mode will regulate the output voltage to the set value until the load current reaches the current setpoint; after the Delay interval, if the current equals or exceeds the setpoint, a fault condition will be generated, and the output voltage will be programmed to zero and the isolation relay opened.

  • Page 228: Figure 5-103: Offset Settings

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-103: Offset Settings PROFILES Selects the operational state of the power source; the default is Profile-0. Up to 15 unique profiles, including transient lists, can be stored; refer to Figure 5-105. Subsequently, a profile can be loaded to automatically set the unit to that configuration.

  • Page 229: Figure 5-106: User Frequency Limit Settings

    Sequoia / Tahoe Series User Manual California Instruments USER F-LIMITS Sets soft limits for the minimum and maximum output frequency to which the unit can be programmed using the front panel or remote digital interface; the default is full-scale. Figure 5-106: User Frequency Limit Settings USER V-LIMITS Sets soft limits for the minimum and maximum output voltage to which the unit can be programmed using the front panel or...

  • Page 230: Figure 5-108: User Current Limit Settings

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-108: User Current Limit Settings PONS The PONS menus allow setting the conditions that would be present after power up; The AC input must be cycled OFF/ON for a change in a PONS setting to take effect. The functions and parameters have the same programmability as described in the menus of the OUTPUT PROGRAM screen.

  • Page 231: Figure 5-109: Configuration Menu, Pons Menu-1/2

    Sequoia / Tahoe Series User Manual California Instruments PONS Menu-2 Figure 5-109: CONFIGURATION Menu, PONS Menu-1/2 The PONS menu has the following fields: Entry Description PONS VOLTAGE PONS menu: Sets the value of the output voltage; the default zero. Figure 5-110: PONS Voltage Settings PONS OVP PONS menu: Programs the PONS Voltage Protection threshold for the output voltage of each output phase.

  • Page 232: Figure 5-111: Pons Ovp Settings

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-111: PONS OVP Settings PONS MODE PONS menu: Selects the mode of operation for the output voltage of the power source: either AC only, DC only, or AC with a DC offset, AC+DC; the default is AC. Figure 5-112: PONS Mode Settings PONS RANGE PONS menu: Selects the output voltage range, either low...

  • Page 233: Figure 5-114: Pons Current Settings

    Sequoia / Tahoe Series User Manual California Instruments PONS CURRENT PONS menu: Sets the value of the output current; the default full-scale for the model. Figure 5-114: PONS Current Settings PONS FREQUENCY PONS menu: Sets the value of the output frequency; the is 60 Hz.

  • Page 234: Figure 5-117: Pons Regulation Menu

    Sequoia / Tahoe Series User Manual California Instruments PONS REGULATION Selects either Current-Limit mode (CL), where the output would be shut down when the current reaches the set value, or Constant-Current mode (CC), where the output current would be regulated when it reaches the set value; the default is Current- Limit Figure 5-117: PONS Regulation menu PONS OUTPUT...

  • Page 235: Figure 5-119: Pons Voltage Sense Settings

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-119: PONS Voltage Sense Settings PONS CLOCK CONFIG PONS menu: Configures the synchronization of the output frequency and phase, dependent on whether the unit is operating Standalone (also applicable to the Leader of a parallel group), as a Leader of a multi-phase group, or as an Auxiliary of a multi- phase group.

  • Page 236: Figure 5-121: Pons Waveform Settings

    Sequoia / Tahoe Series User Manual California Instruments PONS WAVEFORM PONS menu: Selects the type of output waveform, either the standard sine, square, or clipped-sine, or one that is user- defined; the default is a sine wave. The clipped-sine waveform has an additional programmable parameter, CLIP % THD.

  • Page 237: Figure 5-123: Reference Settings

    Sequoia / Tahoe Series User Manual California Instruments External: Enables the external analog interface programming input that sets waveform and amplitude. RPV: Enables the external analog interface programming input that sets the amplitude, while the internal waveform generator is used to set the waveform. Figure 5-123: Reference Settings PONS PHASE NUMBER PONS menu: Selects the output configuration, either 1-Phase...

  • Page 238: Default Screen

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-125: Clock Mode Settings OUTPUT SENSE Selects the point for the sensing of the output voltage for regulation; the default is external. Internal: Local, at the rear panel terminals. External: Remote, through the Remote Sense connection to the load.

  • Page 239: Home Screen Top-Level Menu - (Electronic Load Current Programming Mode)

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-127: Default Screen Settings HOME Screen Top-Level Menu - (Electronic load Current Programming Mode) 5.9.1 Banner Screen Figure 5-128: Banner Screen for Electronic load Current Programming Mode M447352-01 REV-B...

  • Page 240: Home Screen

    Sequoia / Tahoe Series User Manual California Instruments 5.9.2 HOME Screen Figure 5-129: Screen for Electronic load -Current Programming Mode 5.9.3 Dashboard Screen Top-Level Menu The DASHBOARD screen top-level menu allows you to change output parameters and view output measurements simultaneously. The most used output parameters are available in the DASHBOARD menu.

  • Page 241: Figure 5-130: Dashboard Screen Top-Level Menu

    Sequoia / Tahoe Series User Manual California Instruments 3-Phase Mode: Power Factor Current Programming Type 1-Phase Mode: Phase Shift Current Programming Type 1-Phase Mode: Power Factor Current Programming Type Figure 5-130: DASHBOARD Screen Top-Level Menu The following selections are available in the DASHBOARD screen top-level menu. Functions that accept a numeric value require that the value be within the allowed range, otherwise, an error will be generated, and the value will not be accepted.

  • Page 242: Real-Time Parameter Adjustment

    Sequoia / Tahoe Series User Manual California Instruments of that phase for inputting values. When a phase is selected, its button is displayed with a green color. When a phase is not selected, its button is displayed with a gray color. When all phases are selected, entry for one phase will make the same changes for the other phases.

  • Page 243: Output Program Screen

    Sequoia / Tahoe Series User Manual California Instruments 5.9.5 Output Program Screen The OUTPUT PROGRAM screen provides the setting of output-related items such as individual output parameters, mode of regulation and current limit, output waveform selection, and display of real-time output waveform or harmonics spectrum.

  • Page 244: Figure 5-134: Phase Shift Settings

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-134: Phase Shift Settings POWER FACTOR Programs the Power factor value required as a load for the UUT. Figure 5-135: Power Factor Settings Clear Fault Programs the unit to clear all the faults. This button will be enabled only when fault bit is high and disabled when fault bit is low.

  • Page 245: Current Transients Screen

    Sequoia / Tahoe Series User Manual California Instruments 5.9.6 Current Transients Screen 5.9.6.1 LIST Menu The LIST menu shows the transient list, with sequence numbers that are stored in the transient list buffer. Figure 5-137: LIST Menu, With Empty Buffer Figure 5-138: Menu, With Transient List Entry The LIST menu has the following fields: Entry...

  • Page 246: Figure 5-139: List Menu, Add Sub-Menu

    Sequoia / Tahoe Series User Manual California Instruments The ADD sub-menu is opened when the ADD function is selected on the VIEW screen; it allows the selection of the type of transient to be added to the sequence. Figure 5-139: LIST Menu, ADD Sub-Menu The ADD sub-menu has the following fields: Entry Description...

  • Page 247: Figure 5-141: Current Sweep/Step Settings

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-141: Current Sweep/Step Settings CURRENT SURGE/SAG CURRENT SURGE and SAG are temporary changes. The output current will change from its present value to a specified value for a specified duration. Surge is a change to a higher value, while sag is a change to a lower value.

  • Page 248: Figure 5-143: Current Delay Settings

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-143: Current Delay Settings 5.9.6.3 CURRENT DROP Sub-Menu The Current DROP menu allows you to program the output current to drop to zero at the maximum slew rate. After the specified drop time, the current returns to its previous level. Once the transient definition is complete, tap SAVE to store the settings in non-volatile memory and return to the ADD menu.

  • Page 249: Figure 5-145: List Menu, Current Sweep/Step Sub-Menu

    Sequoia / Tahoe Series User Manual California Instruments SETTINGS menu. Delay Sets the time duration, in seconds or cycles, that the voltage amplitude will stay at the previous level (before the drop to zero), before the next transient event is executed, or the transient list is completed.

  • Page 250: Figure 5-146: List Menu, Current Surge/Sag Sub-Menu

    Sequoia / Tahoe Series User Manual California Instruments be zero if only one execution of this event in the list is desired. Func(tion) Selects the waveform to be used during this section of the transient sequence. Each section can use a different waveform from the available user-defined waveforms or the three standard waveforms.
  • Page 251 Sequoia / Tahoe Series User Manual California Instruments The CURRENT SURGE/SAG sub-menu has the following fields: Entry Description T(ime) Sets the time, in seconds or cycles, that the output current will dwell at the level set in the A(mpere) field. A(mpere) Sets the current, in Ampere, that will be reached during the surge or sag time duration.

  • Page 252: Figure 5-147: Run Menu

    Sequoia / Tahoe Series User Manual California Instruments 5.9.6.6 RUN Menu The RUN menu is used to control transient execution; It provides two selections, CONTINUOUS and X TIMES, and START/ABORT functions to begin and stop the execution of a list. Figure 5-147: RUN Menu The RUN menu has the following fields: Entry...

  • Page 253: Configuration Screen

    Sequoia / Tahoe Series User Manual California Instruments 5.9.7 Configuration Screen The CONFIGURATION screen provides a setup of the output mode of operation, power-on states, operation profiles, parameter limits, and selection of clock mode. The top-level menu of the CONFIGURATION screen is shown in Figure 5-148. It can be reached in one of two ways: 1.

  • Page 254: Voltage Protection

    Sequoia / Tahoe Series User Manual California Instruments VOLTAGE PROTECTION Programs the Voltage Protection threshold for the output voltage of each output phase. Exceeding the OVP threshold will result in the shutdown of the output, with the output isolation relay opened and the output voltage programmed to zero.

  • Page 255: Figure 5-152: Waveform Settings

    <n>, through the digital interface. For information on generating user-defined waveforms and their selection, refer to the Sequoia Series Programming Manual P/N M447353-01 or the Sequoia Virtual Panels GUI; refer AMETEK website, www.programmablepower.com, to download the latest version. Figure 5-152: Waveform Settings RANGE Selects the 166 VAC or 333 VAC range for AC mode and 220 VDC or 440 VDC range for DC-mode operation.

  • Page 256: Figure 5-154: Mode Settings

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-154: Mode Settings Selects how the output voltage will be regulated; the default is ALC on: ON: The RMS digital regulator is enabled, and shutdown will be executed if a loss of regulation occurs. OFF: Regulation of the output voltage does not utilize the RMS digital regulator, and shutdown that is dependent on regulation would not occur.

  • Page 257: Figure 5-157: Configuration Menu, Profiles Sub-Menu

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-157: CONFIGURATION Menu, PROFILES Sub- Menu Figure 5-156: PROFILES Menu, NAME Sub-Menu USER CURRENT LIMITS Sets soft limits for the minimum and maximum output voltage which the unit can be programmed using the front panel or remote digital interface;...

  • Page 258: Figure 5-159: Current Program Settings

    Sequoia / Tahoe Series User Manual California Instruments CURRENT PROGRAM TYPE Selects the current program type, either Phase Shift or Power Factor. Figure 5-159: Current Program Settings DEFAULT SCREEN Selects whether the Default screen (showing only voltage and current amplitude) is enabled and configures its operational characteristics;...

  • Page 259: Figure 5-161: Configuration Menu, Pons Menu

    Sequoia / Tahoe Series User Manual California Instruments CAUTION! The PONS menus allow selecting that the output would be turned on and programmed to a high voltage when the unit is initially powered up. Ensure that suitable protection is provided to prevent accidentally energizing the load. The factory-default setting is with the output off and programmed to zero to provide the safest start-up condition.

  • Page 260: Figure 5-163: Pons Mode Settings

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-163: PONS Mode Settings PONS RANGE PON menu: Selects the output voltage range, either low- range,166 VAC or 220 VDC, or high range, 333 VAC or 440 VDC. The available ranges are dependent on the selection of the VOLTAGE mode, either AC or DC;...

  • Page 261: Figure 5-166: Pons Phase Shift Settings

    Sequoia / Tahoe Series User Manual California Instruments PONS PHASE SHIFT PONS menu: Sets the value of the output Phase shift Figure 5-166: PONS Phase Shift Settings PONS POWER FACTOR PONS menu: Sets the value of the output Power factor. Figure 5-167: PONS Power Factor Settings PONS SYNC PONS menu: Programs the Sync Voltage, Sync Phase of...

  • Page 262: Figure 5-169: Pons Waveform Settings

    Sequoia / Tahoe Series User Manual California Instruments PONS WAVEFORM PONS menu: Selects the type of output waveform, either the standard sine, square, or clipped-sine, or one that is user- defined; the default is a sine wave. The clipped-sine waveform has an additional programmable parameter, CLIP % THD.

  • Page 263: Figure 5-172: Pons Phase Number Settings

    Sequoia / Tahoe Series User Manual California Instruments that sets the amplitude, while the internal waveform generator is used to set the waveform. PONS PHASE NUMBER PONS menu: Selects the output configuration, either 1-Phase or 3 Phase, for 3-Phase models; the default is 3-Phase. Figure 5-172: PONS Phase Number Settings PONS CURRENT PROGRAM TYPE...

  • Page 264: Home Screen Top-Level Menu - (Electronic Load Power Programming Mode)

    Sequoia / Tahoe Series User Manual California Instruments 5.10 HOME Screen Top-Level Menu - (Electronic load Power Programming Mode) 5.10.1 Banner Screen Figure 5-174: Banner Screen for Electronic load – Power Programming 5.10.2 HOME Screen Figure 5-175: HOME Screen for Electronic load – Power Programming Mode M447352-01 REV-B...

  • Page 265: Dashboard Screen Top-Level Menu

    Sequoia / Tahoe Series User Manual California Instruments 5.10.3 Dashboard Screen Top-Level Menu The DASHBOARD screen top-level menu allows you to adjust output parameters and view output measurements at the same time. The most used output parameters are available in the DASHBOARD screen menu.

  • Page 266: Real-Time Parameter Adjustment

    Sequoia / Tahoe Series User Manual California Instruments Entry Description Setting Active Power Programs the Active power required as a load for the UUT. Re-Active Power Programs the Reactive Power is required as a load for the UUT. RANGE Displays 166 VAC or 333 VAC range for AC-mode and 220 VDC or 440 VDC range for DC-mode operation.

  • Page 267: Output Program Screen

    Sequoia / Tahoe Series User Manual California Instruments 5.10.5 Output Program Screen The OUTPUT PROGRAM screen provides the setting of output-related items such as individual output parameters, mode of regulation and current limit, output waveform selection, and display of real-time output waveform or harmonics spectrum.

  • Page 268: Configuration Screen

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-180: Reactive Power Settings Clear Fault Programs the unit to clear all the faults. This button will be enabled only when fault bit is high and disabled when fault bit is low. Figure 5-181: Clear Fault Settings 5.10.6 Configuration Screen...

  • Page 269: Figure 5-182: Configuration Screen Top-Level Menu

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-182: CONFIGURATION Screen Top-Level Menu The following sub-menus are available in the CONFIGURATION menu: Entry Description SYNC SETTINGS Programs the Sync Voltage, Sync Phase of each output phase, and Sync Freq. Figure 5-183: Sync Settings VOLTAGE PROTECTION Programs the Voltage Protection threshold for the output...

  • Page 270: Figure 5-184: Ovp Settings

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-184: OVP Settings PHASE NUMBER Programs the output phase configuration: One-Phase or Three-Phase. The default is Three-Phase. Figure 5-185: Phase Number Settings WAVEFORM Selects the waveform for the output voltage: either standard waveforms for sine wave, square wave, clipped- sine wave;...

  • Page 271: Figure 5-186: Waveform Settings

    Sequoia / Tahoe Series User Manual California Instruments Manual P/N M447353-01 or the Sequoia Virtual Panels GUI; refer to AMETEK PPD website, www.programmablepower.com, to download the latest version. Figure 5-186: Waveform Settings RANGE Selects the 166 VAC or 333 VAC range for AC mode, and 220 VDC or 440 VDC range for DC-mode operation.

  • Page 272: Figure 5-188: Mode Settings

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-188: Mode Settings Selects how the output voltage will be regulated; the default is ALC on: ON: The RMS digital regulator is enabled, and shutdown will be executed if a loss of regulation occurs. OFF: Regulation of the output voltage does not utilize the RMS digital regulator, and shutdown that is dependent on regulation would not occur.

  • Page 273: Figure 5-190: Configuration Menu, Profiles Sub-Menu

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-190: CONFIGURATION Menu, PROFILES Sub-Menu Figure 5-191: PROFILES Menu, NAME Sub-Menu USER CURR LIMITS Sets soft limits for the minimum and maximum output voltage that the unit can be programmed to, either via the front panel or remote digital interface.

  • Page 274: Figure 5-193: Default Screen Settings

    Sequoia / Tahoe Series User Manual California Instruments DEFAULT SCREEN Selects whether the Default screen (showing only voltage and current amplitude) is enabled and configures its operational settings. The default settings are the Default screen enabled with a 10-second timeout. Timeout Interval: Select the time, in seconds, for how long a screen must be inactive before the Default screen is displayed.

  • Page 275: Figure 5-195: Pons Ovp Settings

    Sequoia / Tahoe Series User Manual California Instruments The PONS menu has the following fields: Entry Description PONS OVP PONS menu: Programs the PONS Voltage Protection threshold for the output voltage of each output phase. Exceeding the OVP threshold will result in the shutdown of the output, with the output isolation relay opened and the output voltage programmed to zero.

  • Page 276: Figure 5-197: Pons Range Settings

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-197: PONS Range Settings PONS ACTIVE POWER PONS menu: Sets the value of the output active power as a load for the UUT. required Figure 5-198: PONS Active Power Settings PONS REACTIVE POWER PONS menu: Sets the value of the output Reactive power required as a load for the UUT.

  • Page 277: Figure 5-200: Pons Sync Settings

    Sequoia / Tahoe Series User Manual California Instruments UUT. Figure 5-200: PONS Sync Settings PONS WAVEFORM PONS menu: Selects the type of output waveform, either standard sine, square, or clipped-sine, or one that is user-defined; the default is a sine wave. The clipped-sine waveform has an additional programmable parameter, CLIP % THD.

  • Page 278: Figure 5-202: Pons Alc Settings

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-202: PONS ALC Settings PONS PHASE NUMBER PONS menu: Selects the output configuration, either 1-Phase 3 Phase, for 3-Phase models; the default is 3-Phase. Figure 5-203: PONS Phase Number Settings M447352-01 REV-B...

  • Page 279: Home Screen Top-Level Menu - (Electronic Load Rlc Programming Mode)

    Sequoia / Tahoe Series User Manual California Instruments 5.11 HOME Screen Top-Level Menu - (Electronic load RLC Programming Mode) 5.11.1 Banner Screen Figure 5-204: Banner Screen for Electronic load – RLC Programming Mode 5.11.2 Home Screen Figure 5-205: HOME Screen for Electronic load – RLC Programming Mode 5.11.3 Dashboard Screen Top-Level Menu...

  • Page 280: Figure 5-206: Dashboard Screen Top-Level Menu

    Sequoia / Tahoe Series User Manual California Instruments 3-Phase Mode 1-Phase Mode Figure 5-206: DASHBOARD Screen Top-Level Menu The following selections are available in the DASHBOARD screen top-level menu. Functions that accept a numeric value require that the value be within the allowed range, otherwise, an error will be generated, and the value will not be accepted.

  • Page 281: Figure 5-207: Touch-Screen Numeric Keypad - Rlc

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-207: Touch-Screen Numeric Keypad - RLC Inductance User can program the Inductance required as a load for the UUT. If the user wants to remove the Inductance connection, select NC on the keyboard. NC refers to No Connection.

  • Page 282: Output Program Screen

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-209: Apply button Disabled when there is no change in R, L, or RANGE Displays 166 VAC or 333 VAC range for AC-mode, and 220 VDC or 440 VDC range for DC mode operation. The OUTPUT state must be OFF for a change in range to be executed.

  • Page 283: Figure 5-210: Output Program Screen Top-Level Menu

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-210: OUTPUT PROGRAM Screen Top-Level Menu The following choices are available in the OUTPUT PROGRAM screen top-level menu. Functions that accept a numeric value require that the value be within the allowed range, otherwise, an error will be generated, and the value will not be accepted.

  • Page 284: Configuration Screen

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-212: Clear Fault Settings 5.11.5 Configuration Screen The CONFIGURATION screen provides a setup of the output mode of operation, power-on states, operation profiles, parameter limits, and selection of clock mode. The top-level menu of the CONFIGURATION screen is shown in Figure 5-212.

  • Page 285: Figure 5-214: Sync Settings

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-214: Sync Settings VOLTAGE PROTECTION Programs the Voltage Protection threshold for the output voltage of each output phase. Exceeding the OVP threshold will result in the shutdown of the output, with the output isolation relay opened and the output voltage programmed to zero.

  • Page 286: Figure 5-217: Waveform Settings - Ac Mode

    Sequoia Series Programming Manual P/N M447353-01 or the Sequoia Virtual Panels GUI; refer AMETEK website, www.programmablepower.com, to download the latest version. NOTE: Waveform settings are not available in the DC mode of operation Figure 5-217: Waveform Settings –...

  • Page 287: Figure 5-218: Range Settings

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-218: Range Settings MODE Selects the mode of operation of output voltage: either AC or DC. This selection also determines the available output voltage ranges: 166/333 Vrms in AC and 220/440 VDC in DC mode. The output must be turned off to change this setting.

  • Page 288: Figure 5-220: Alc Settings

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-220: ALC Settings PROFILES Selects the operational state of the power source; the default is Profile-0. Up to 15 unique profiles, including transient lists, can be stored; Subsequently, a profile can be loaded to automatically set the unit to that configuration.

  • Page 289: Figure 5-223: User Current Limit Settings

    Sequoia / Tahoe Series User Manual California Instruments USER CURRENT LIMITS Sets soft limits for the minimum and maximum output voltage which the unit can be programmed using the front panel or remote digital interface; the default is full-scale. Figure 5-223: User Current Limit Settings DEFAULT SCREEN Selects whether the Default screen (showing only voltage and current amplitude) is enabled and configures its...

  • Page 290: Figure 5-225: Configuration Menu, Pons Menu

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-225: CONFIGURATION Menu, PONS Menu The PONS menu has the following fields: Entry Description PONS OVP PONS menu: Programs the PONS Voltage Protection threshold for the output voltage of each output phase. Exceeding the OVP threshold will result in the shutdown of the output, with the output isolation relay opened and the output voltage programmed to zero.

  • Page 291: Figure 5-227: Pons Mode Settings

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-227: PONS Mode Settings PONS RANGE PONS menu: Selects the output voltage range, either low- range,166 VAC or 220 VDC, or high range, 333 VAC or 440 VDC. The available ranges are dependent on the selection of the VOLTAGE mode, either AC or DC;...

  • Page 292: Figure 5-230: Pons Inductance Settings

    Sequoia / Tahoe Series User Manual California Instruments PONS INDUCTANCE PONS menu: Sets the value of the output Inductance. Figure 5-230: PONS Inductance Settings PONS CAPACITANCE PONS menu: Sets the value of the output Capacitance. Figure 5-231: PONS Capacitance Settings PONS SYNC Programs the Sync Voltage, Sync Phase of each output phase, and Sync Freq...

  • Page 293: Figure 5-233: Pons Waveform Settings

    Sequoia / Tahoe Series User Manual California Instruments PONS WAVEFORM PONS menu: Selects the type of output waveform, either the standard sine, square, or clipped-sine, or one that is user- defined; the default is a sine wave. The clipped-sine waveform has an additional programmable parameter, CLIP % THD.

  • Page 294: Measurements Screen

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-235: PONS Phase Number Settings 5.12 Measurements Screen The Sequoia\Tahoe Series power source uses a DSP-based data acquisition system to provide extensive information regarding the output parameters. This data acquisition system digitizes the voltage and current waveforms and calculates parameter values from the data.

  • Page 295: Figure 5-237: Voltage Measurements

    Sequoia / Tahoe Series User Manual California Instruments The following functions are available in the menus of the MEASUREMENTS screen: Entry Description VOLTAGE Displays the true RMS value of the output voltage measured at the voltage sense lines (user-selectable as local or remote). In DC mode, the voltage represents the DC voltage, including polarity.

  • Page 296: Figure 5-239: Power Measurements - Source, Grid Simulator, Electronic Load - Rms Current And Electronic Load Rlc Programming Mode

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-239: Power Measurements – Source, Grid Simulator, Electronic load – RMS Current and Electronic load RLC Programming Mode Figure 5-240: Power Measurements – Electronic load – Power Programming Mode CURRENT When in AC-mode or (AC+DC)-mode, displays the RMS output current.

  • Page 297: Figure 5-241: Current Measurements

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-241: Current Measurements PHASE Displays the phase angle of the output of the power source: in a standalone unit, the phase angle would be with respect to the external SYNC signal; in an auxiliary unit (with LKS option) of a multi-phase group, the phase angle would be between the Auxiliary output and the Leader output.

  • Page 298: Current Thd

    Sequoia / Tahoe Series User Manual California Instruments CREST FACTOR Displays the crest factor of the output current as the ratio of its peak value to its RMS value. Figure 5-244: Cress Factor Measurements WATT HOUR Displays the energy, kWh, consumed by the load, and the true power in kW.

  • Page 299: Figure 5-246: Current Thd Measurements

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-246: Current THD Measurements VOLTAGE THD Displays the total distortion of the output voltage. The distortion calculation is based on the harmonic voltages, H2 through H50, relative to the total RMS value of the voltage. Another common definition of THD calculates the harmonics relative to the value of the fundamental voltage H1.

  • Page 300: Figure 5-248: Harmonics Menu

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-248: HARMONICS Menu The HARMONICS menu has the following fields: Entry Description FUNCTION HARMONICS menu: Selects Voltage or Current for display. VIEW HARMONICS menu: Selects display modes, as follows: Table: Displays the first 50 harmonics (bandwidth limited) in a tabular text format, shown below.

  • Page 301: Figure 5-249: Harmonics Menu, Table View

    Sequoia / Tahoe Series User Manual California Instruments acquisition holds until the zero-phase angle occurs, before triggering the acquisition. This mode allows the exact positioning of the acquisition data window with respect to the voltage waveform. DELAY HARMONICS menu: Selects the time delay to position the trigger point relative to the acquisition window.

  • Page 302: Control Interface Screen

    Sequoia\Tahoe Virtual Panels GUI, refer to the Sequoia Series Programming Manual P/N M447353- 01, refer to AMETEK PPD website, www.programmablepower.com, to download the latest version. In the Electronic load Mode of operation, the External Analog programming feature is not applicable for the Power Programming and Parallel RLC Programming modes.

  • Page 303: Figure 5-251: Control Interface Screen

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-251: CONTROL INTERFACE Screen Figure 5-252: CONTROL INTERFACE Screen for Electronic Load-Power and Parallel RLC Programming The following sub-menus are available in the CONTROL INTERFACE menu: Entry Description ANALOG Selects the reference that determines the output voltage waveform and amplitude;...

  • Page 304: Figure 5-253: Control Interface Menu, Analog Sub- Menu

    Sequoia / Tahoe Series User Manual California Instruments Note: External Reference is not supported in Electronic load Mode. Figure 5-253: CONTROL INTERFACE Menu, ANALOG Sub- Menu Figure 5-254: ANALOG Sub-Menu for Electronic load- Current Programming Mode RS232 Configures the RS-232C communications interface; These settings must match those set for the communications port of the user's external controller.

  • Page 305: Figure 5-255: Control Interface Menu, Rs232 Sub-Menu

    Sequoia / Tahoe Series User Manual California Instruments necessary, but CR/LF (ASCII 10 / ASCII 13) would be accepted. Terminator for Transmitted Messages: LF (ASCII 13). Flow Control: available hardware handshake RTS/CTS; utilization is recommended, but not mandatory. Figure 5-255: CONTROL INTERFACE Menu, RS232 Sub-Menu GPIB Sets the IEEE-488 address;...

  • Page 306: Figure 5-257: Control Interface, Lan Menu

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-257: CONTROL INTERFACE, LAN Menu The following sub-menus are available in the LAN menu: Entry Description LAN SETTINGS Lists the configuration settings of the LAN interface, and the DNS-SD service name; a number, (n), would be appended to the service name, if necessary, to differentiate duplicate power source names.

  • Page 307: Lan Config

    Sequoia / Tahoe Series User Manual California Instruments IP Address: Sets the IP address, when DHCP is turned off in the LAN CONFIG sub-menu (see below); when AUTO IP is selected, set the IP address to all zeros so that the IP address would be requested from the network;...

  • Page 308: Figure 5-262: Lan Configuration

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-262: LAN Configuration Gateway Address: Sets the gateway address when DHCP is turned off in the LAN CONFIG sub-menu; when AUTO IP is selected, set the gateway address to all zeros so that the gateway address would be requested from the network;...

  • Page 309: Remote Inhibit

    Sequoia / Tahoe Series User Manual California Instruments MAC Address: Displays the MAC address; the MAC address is listed on a label on the chassis of the unit. Figure 5-265: MAC Address Host Name: Allows setting a unique alpha-numeric hostname. Figure 5-266: Host Name Restore Default: Performs an LXI reset to default settings.

  • Page 310: System Settings Screen

    Sequoia / Tahoe Series User Manual California Instruments Latching: A TTL logic signal at the external Remote Inhibit input latches the output in the shutdown state; when the output is turned off, it is programmed to zero volts, and the output relays are opened;...

  • Page 311: Figure 5-270: System Settings Screen

    Sequoia / Tahoe Series User Manual California Instruments 2. Scrolling to SYSTEM SETTINGS with the encoder and depressing the encoder switch. The Up-arrow button will return to the previously selected screen menu (in this case the HOME Screen). The HOME button will return to the HOME screen that has the top-level menu for the sub-menu being displayed;...

  • Page 312: Figure 5-272: Model And Firmware Version Screen For Source Mode

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-272: Model and Firmware Version Screen for Source Mode Figure 5-273: Model and Firmware Version Screen for Grid Simulator Figure 5-274: Model and Firmware Version Screen for Electronic load – Current Programming Mode M447352-01 REV-B...

  • Page 313: Figure 5-275: Model And Firmware Version Screen For Electronic Load - Power Programming Mode

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-275: Model and Firmware Version Screen for Electronic load – Power Programming Mode Figure 5-276: Model and Firmware Version Screen for Electronic load – RLC Programming Mode OPTIONS Displays options that have been installed in the power source. Figure 5-277: Options Screen M447352-01 REV-B...

  • Page 314: Figure 5-278: Options Screen

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-278: Options Screen LANGUAGE Selects the language of the display menus: English, German, French, Russian, Japanese, Chinese, or Korean. Figure 5-279: Language Screen HARDWARE LIMITS Displays the parameter limit values that are asserted at power-on.

  • Page 315: Warning/Fault Screen

    Sequoia / Tahoe Series User Manual California Instruments Provides settings for the calibration of the display touch- screen. Figure 5-281: LCD Settings Calibration Enables the calibration routine for the display touch-screen; the calibration is run by tapping the displayed target, as instructed on the display.

  • Page 316: Figure 5-283: Warning Fault Screen

    Sequoia / Tahoe Series User Manual California Instruments Figure 5-283: Warning Fault Screen M447352-01 REV-B...

  • Page 317: Waveform Management

    SCPI commands or the Sequoia Virtual Panels GUI; refer to the Sequoia Series Programming Manual P/N M447353-01 and Tahoe Series Programming Manual P/N M447354-01 in the AMETEK PPD website, www.programmablepower.com, to download latest version.

  • Page 318: Rms Amplitude Restrictions

    Sequoia / Tahoe Series User Manual California Instruments TABLE Sub-Menu BAR Sub-Menu Figure 6-1: HARMONICS Screen, Waveform Information RMS Amplitude Restrictions The maximum RMS value that can be programmed within a voltage range is dependent on the crest factor of the output voltage waveform due to constraints of the power stage amplifier on producing the peak voltage.

  • Page 319: Transient List Waveforms

    Sequoia / Tahoe Series User Manual California Instruments frequency limit of the power source. The frequency limit is a function of the harmonic content of the waveform and is derived from the following relation: ≤ (V × F / (V ×...
  • Page 320 Sequoia / Tahoe Series User Manual California Instruments This page is intentionally left blank. M447352-01 REV-B...

  • Page 321: Standard Measurements

    SCPI commands or the Sequoia Virtual Panels GUI; refer to the Sequoia Series Programming Manual P/N M447353-01, Tahoe Series Programming Manual P/N M447354-01 or refer to AMETEK PPD website, www.programmablepower.com, to download the latest version.

  • Page 322: Accuracy Considerations

    SCPI commands or the Sequoia Virtual Panels GUI; refer to the Sequoia Series Programming Manual P/N M447353-01, Tahoe Series Programming Manual P/N M445374-01 or refer to AMETEK PPD website, www.programmablepower.com, to download the latest version.

  • Page 323: Analyzing Fft Data

    Sequoia / Tahoe Series User Manual California Instruments Figure 7-1: HARMONICS Menu 2. Scroll to the FUNCTION field and select VOLT or CURRENT. 3. Scroll to the VIEW field and select the TABLE or BAR display mode. 4. Scroll to the DATA field and select ABSOLUTE or RELATIVE. The ABSOLUTE display format will show all harmonic components in volts or amps.

  • Page 324: Triggering Measurements

    Sequoia / Tahoe Series User Manual California Instruments Figure 7-2: FFT data in Tabular Format Figure 7-3: FFT data in Bar Graph Format FFT data displayed in bar chart format shows the same data in a graphical format; refer to Figure 7-3. While the amplitude information is shown graphically, phase data is only displayed in numeric format at the right- side of the display.

  • Page 325: Trigger Source

    Sequoia / Tahoe Series User Manual California Instruments The following trigger modes are available in the HARMONICS menu: Single (SINGLE) This mode causes the acquisition system to be armed only once after the initial START. The power source waits until a trigger event occurs, after which data is acquired;...

  • Page 326: Trigger Delay

    Sequoia / Tahoe Series User Manual California Instruments 7.3.3 Trigger delay The trigger DELAY field allows setting the amount of pre- or post-trigger data that should be used when positioning the data acquisition window with respect to the trigger event. Entry Description POST-TRIGGER DELAY...

  • Page 327: Figure 7-6: Pre-Trigger (Negative Delay)

    Sequoia / Tahoe Series User Manual California Instruments Figure 7-6: Pre-Trigger (Negative Delay) M447352-01 REV-B...
  • Page 328 Sequoia / Tahoe Series User Manual California Instruments This page is intentionally left blank. M447352-01 REV-B...

  • Page 329: Transient Programming

    SCPI commands or the Sequoia Virtual Panels GUI; refer to the Sequoia Series Programming Manual M447353-01, Tahoe Series Programming Manual P/N M445374-01 or refer to AMETEK PPD website, www.programmablepower.com, to download the latest version. 8.1.1...

  • Page 330: Figure 8-1: Pulse Transients

    SCPI commands or the Sequoia Virtual Panels GUI; refer to the Sequoia Series Programming Manual M447353-01, Tahoe Series Programming Manual P/N M445374-01 or refer to AMETEK PPD website, www.programmablepower.com, to download the latest version.

  • Page 331: Figure 8-2: Pulse Transients

    33%. Pulse transients can only be programmed through the remote digital interface using SCPI commands or the Sequoia Virtual Panels GUI; refer to the Sequoia Series Programming Manual M447353- 01, Tahoe Series Programming Manual P/N M445374-01 or refer to AMETEK PPD website, www.programmablepower.com, to download the latest version.

  • Page 332: Figure 8-3: List Transients

    Sequoia / Tahoe Series User Manual California Instruments Figure 8-3: List Transients To set up this type of transient list through the front panel, proceed as follows: 1. Navigate to the SETTINGS menu of the TRANSIENTS screen; refer to Figure 8-4 and Figure 8-5. Set the parameter values as follows: Phase: A, B, or C Time: sec...

  • Page 333: Figure 8-5: Transients Settings Screen

    Sequoia / Tahoe Series User Manual California Instruments Figure 8-5: Transients Settings Screen Tap on the TRIGGER sub-menu; refer to Figure 8-6. Set the parameter values as follows: Phase Sync: All Trig Out Source: BOT Start Source: Immediate Figure 8-6: Settings Screen – Trigger Sub-Menu 2.

  • Page 334: Figure 8-8: Ac Mode Transients Type Selection For Source And Grid-Simulator Operating Modes

    Sequoia / Tahoe Series User Manual California Instruments 3. Tap the ADD field to enter the ADD sub-menu; refer to Figure 8-8 and Figure 8-9. Figure 8-8: AC Mode Transients Type Selection for Source and Grid-Simulator Operating Modes Figure 8-9: DC Mode Transients Type Selection for Source and Grid-Simulator Operating Modes 4.

  • Page 335: Figure 8-10: List Menu, Voltage Surge/Sag Settings Sub-Menu

    Sequoia / Tahoe Series User Manual California Instruments Figure 8-10: List Menu, Voltage Surge/Sag Settings sub-menu 5. Tap the SAVE field in the VOLTAGE SURGE/SAG sub-menu. 6. Repeat Steps 4 through 7 two more times using 120 V / 83 ms and 80 V / 150 ms as values. 7.

  • Page 336: Programming Slew Rates

    SCPI commands or the Sequoia Virtual Panels GUI; refer to the Sequoia Series Programming Manual M447353-01, Tahoe Series Programming Manual P/N M445374-01 or refer to AMETEK PPD website, www.programmablepower.com, to download latest version.

  • Page 337: Saving Transient List Programs

    Sequoia / Tahoe Series User Manual California Instruments A Transient list can be executed from the RUN menu of the Transients screen; refer to Figure 8-4. Tapping on the RUN selection-field will open the RUN menu; refer to Figure 8-13. A selection is made whether to run the transient list repetitively (Continuous button) or multiple times (X Times button).

  • Page 338: Current Transient Programming

    The full capability of transients programming is accessed through the remote digital interface using SCPI commands or the Sequoia Virtual Panels GUI; refer to the Sequoia Series Programming Manual P/N M447353-01, refer to AMETEK PPD website, www.programmablepower.com, to download latest version.

  • Page 339: Figure 8-15: Output Transient Modes

    Sequoia / Tahoe Series User Manual California Instruments triggers. Fixed Turns off the transient functions; with SCPI commands, only the IMMediate values are used as the data source for a particular function. Figure 8-15 shows a representation of programming changes in the transient modes, and the output waveform that is generated in each mode.

  • Page 340: Figure 8-16: Pulse Transients - Current

    Transient list programming is supported through the front panel with the TRANSIENTS menu. Transient lists can also be programmed through the remote digital interface using SCPI commands or the Sequoia Virtual Panels GUI; refer to the Sequoia Series Programming Manual M447353-01, refer to AMETEK PPD website, www.programmablepower.com, to download the latest version.

  • Page 341: Figure 8-17: List Transients

    Sequoia / Tahoe Series User Manual California Instruments Figure 8-17: List Transients To set up this type of transient list through the front panel, proceed as follows: 1. Navigate to the SETTINGS menu of the TRANSIENTS screen; refer to Figure 8-18 and Figure 8- 19.

  • Page 342: Figure 8-19: Transients Settings Screen

    Sequoia / Tahoe Series User Manual California Instruments Figure 8-19: Transients Settings Screen 2. Tap on the TRIGGER sub-menu; refer to Figure 8-20. Set the parameter values as follows: Sync: All Phase Trig Out Source: BOT Start Source: Immediate Figure 8-20: Settings Screen – Trigger Sub-Menu 3.

  • Page 343: Figure 8-22: Current Transients Type Selection For Electronic Load - Current Programming Mode

    Sequoia / Tahoe Series User Manual California Instruments 4. Tap the ADD field to enter the ADD sub-menu; refer to Figure 8-22. Figure 8-22: Current Transients Type Selection for Electronic load – Current Programming Mode 5. Tap the CURRENT SURGE/SAG selection button, refer to Figure 8-23. Enter the following parameter values: T(ime): 0.083 sec (the value is entered as seconds, with a minimum time resolution of 0.001 sec.) A(mpere): 80 A (the surge current value.)

  • Page 344: Programming Slew Rates

    SCPI commands or the Sequoia Virtual Panels GUI; refer to the Sequoia Series Programming Manual M447353-01, refer to AMETEK PPD website, www.programmablepower.com, to download the latest version.

  • Page 345: Figure 8-25: Switching Waveforms In A Transient List Transient Execution

    Sequoia / Tahoe Series User Manual California Instruments The FUNCTION field in each transient list event setup menu can be used to dynamically switch waveforms during transient execution. This allows different waveforms to be used without turning off the output of the source.

  • Page 346: Saving Transient List Programs

    Sequoia / Tahoe Series User Manual California Instruments 8.2.4 Saving Transient List Programs When the power source is turned off, the transient list that was programmed is not automatically saved. Therefore, the programmed transient list would be lost if the unit is turned off. However, transient programs are saved in nonvolatile memory for later recall.

  • Page 347: Options

    Standard Revisions and EUT Classes The–411 option supports the first (1994-06), the second edition (2004-03) and the third edition (2020-01) of the IEC 61000-4-11 test standard. Contact techsupport.ppd@ametek.com for upgrade information. The standard revision can be selected when using the Virtual-Panel GUI-Windows program.

  • Page 348: Table 9-1: Phase Mapping

    Sequoia / Tahoe Series User Manual California Instruments are embedded in the firmware and conform to table C.2 of IEC 61000-4-34. Since all phase programming on the Sequoia/Tahoe Series is referenced to phase A, voltage dip with a phase angle for A other than 0° are implemented by offsetting all three phases by the required number of degrees to get phase A at 0°.

  • Page 349: Test Types

    Sequoia / Tahoe Series User Manual California Instruments 40% dip 100% 100% 100% 100% 100% L1-L2 150° 270° 67° 79° 120° 240° 0° 41° 161° 40% dip 100% 100% 100% 100% 100% L2-L3 187° 270° 30° 0° 199° 240° 0° 199°...

  • Page 350: Using The Virtual-Panel Gui-Windows Program For Iec 61000-4-11 Tests

    However, this support is only available from firmware revision 0.32 onwards. If you are using an older firmware version, only the first edition is supported. For information on upgrading the firmware, you should techsupport.ppd@ametek.com If your system supports the second or third editions (Editions 2.0 and 3.0), you can select which version of the standard you want to use in the system settings.

  • Page 351: Option -413: Iec 61000-4-13 Interharmonics Test

    Sequoia / Tahoe Series User Manual California Instruments Note: For complete details on how to use the Virtual-Panel GUI program –411 option test screen and voltage variations specification of different Editions, refer to the on-line help of the Virtual-Panel GUI- Windows Program available from the Help menu.

  • Page 352: Figure 9-2: Iec 61000-4-13 Test Flowchart Class 1 And Class 2

    Sequoia / Tahoe Series User Manual California Instruments Figure 9-2: IEC 61000-4-13 Test Flowchart Class 1 and Class 2 M447352-01 REV-B...

  • Page 353: Figure 9-3: Iec 61000-4-13 Test Flowchart Class 3

    Sequoia / Tahoe Series User Manual California Instruments Figure 9-3: IEC 61000-4-13 Test Flowchart Class 3 M447352-01 REV-B...

  • Page 354: Using The Virtual-Panel Gui-Windows Program For Iec 61000-4-13 Tests

    Sequoia / Tahoe Series User Manual California Instruments 9.3.4 Using the Virtual-Panel GUI-Windows Program for IEC 61000-4-13 Tests Figure 9-4: Virtual-Panel GUI-Windows Program for IEC 61000-4-13 Tests The Virtual-Panel GUI-Windows control program will detect the presence of the –413 option on the SQ/TA AC power source.

  • Page 355: 10. Calibration

    Sequoia / Tahoe Series User Manual California Instruments 10. CALIBRATION This section explains the steps to calibrate the power supply. Calibration should be done every 12 months or after service if subassemblies are replaced. The procedures are performed using SCPI commands through the remote digital interface.

  • Page 356: 10.2.2 Output Voltage Dc Zero Alignment, Ac-Mode

    Sequoia / Tahoe Series User Manual California Instruments CAUTION! The AC input power must be turned off and then on again after calibration is complete to end the alignment routines and apply the calibration. This is also required if only parts of the calibration procedure are performed.

  • Page 357: 10.2.3 Output Voltage Ac Zero Alignment, Ac-Mode

    Sequoia / Tahoe Series User Manual California Instruments 18. Send the SCPI command INST:NSEL 2, and repeat Step-7 to align Phase-B. 19. Send the SCPI command INST:NSEL 3, and repeat Step-7 to align Phase-C. 10.2.3 Output Voltage AC Zero Alignment, AC-Mode 1.

  • Page 358: Source Mode: Adc Ac Volt Offset Calibration

    Sequoia / Tahoe Series User Manual California Instruments increase or decrease the value until the measured value ≤ 0.005 VDC. 12. Send the SCPI command INST:NSEL 2, and repeat Step-5 and Step-7 to align Phase-B. 13. Send the SCPI command INST:NSEL 3, and repeat Step-5 and Step-7 to align Phase-C. 10.2.5 Source Mode: ADC AC VOLT Offset calibration 1.

  • Page 359: Output Voltage Gain Initial Alignment, Ac-Mode, And Dc-Mode

    Sequoia / Tahoe Series User Manual California Instruments 10.2.7 Output Voltage Gain Initial Alignment, AC-Mode, and DC-Mode 1. With the external DVM set for AC, monitor the voltage at the power source output. 2. Ensure that there is no load connected to the output of the power source. 3.

  • Page 360: Output Voltage Measurement Ac Gain Alignment, Ac-Mode

    Sequoia / Tahoe Series User Manual California Instruments 19. Send the SCPI command INST:NSEL 2, and repeat Step-15 through Step-18 to align Phase-B. 20. Send the SCPI command INST:NSEL 3, and repeat Step-15 through Step-18 to align Phase-C. 10.2.8 Output Voltage Measurement AC Gain Alignment, AC-Mode 1.

  • Page 361: Output Voltage Measurement Dc-Negative Gain Alignment, Dc-Mode

    Sequoia / Tahoe Series User Manual California Instruments 10. Send the SCPI command INST:NSEL 3, and repeat Step-5 through Step-7 to align Phase-C. 10.2.10 Output Voltage Measurement DC-Negative Gain Alignment, DC-Mode 1. With the external DMM set for DC, monitor the voltage at the power source output. 2.

  • Page 362: Output Current Measurement Ac Low-Range Gain Alignment, Ac-Mode

    Sequoia / Tahoe Series User Manual California Instruments 10.2.11 Output Current Measurement AC Low-Range Gain Alignment, AC-Mode 1. Connect the power analyzer for AC current measurement. 2. Connect the load to the output of the power source. 3. Set load to the low-range resistance for 90% of the rated current, appropriate for the model that is to be aligned.

  • Page 363: Output Current Measurement Ac High-Range Gain Alignment, Ac-Mode

    Sequoia / Tahoe Series User Manual California Instruments 10.2.12 Output Current Measurement AC High-Range Gain Alignment, AC-Mode 1. Connect the power analyzer for AC current measurement. 2. Connect the load to the output of the power supply. 3. Set load to the high-range resistance for 90% of the rated current, appropriate for the model that is to be aligned.

  • Page 364: Output Current Measurement Ac High-Range Offset Alignment, Ac-Mode

    Sequoia / Tahoe Series User Manual California Instruments 2. Enter the calibration password with the SCPI command CAL:PASS “5000”. 3. Send the following SCPI command to select Phase-A: INST:NSEL 1. 4. Send the following SCPI commands to the power source (166 VAC range selected; ALC off): INST:COUP ALL MODE AC VOLT:RANGE 166...

  • Page 365: Source Mode: Adc Dc Volt Offset Calibration

    Sequoia / Tahoe Series User Manual California Instruments 3. Send the following SCPI command to select Phase-A: INST:NSEL 1. 4. Enable the IEC413 option. 5. Send the following SCPI commands to the power source (333 VAC range selected): MODE AC VOLT:RANGE 333 FREQ 50 OUTP ON...

  • Page 366: Output Current Measurement Dc-Positive High-Range Gain Alignment, Dc-Mode

    Sequoia / Tahoe Series User Manual California Instruments 2. Connect the load to the output of the power supply. 3. Set load for the low-range resistance for 90% of the rated current, appropriate for the model that is to be aligned. Ensure that the load setting maintains the power source in the constant-voltage (CV) mode of operation.

  • Page 367: Output Current Measurement Dc-Negative Low-Range Gain Alignment, Dc-Mode

    Sequoia / Tahoe Series User Manual California Instruments rated current>. 8. Perform the alignment with the SCPI command CAL:MEAS:CURR:DC <numeric value>. The numeric value for the selected phase is the actual output current derived from the reading of the external power analyzer. 9.

  • Page 368: Output Current Measurement Low-Range Offset Alignment, Dc-Mode

    Sequoia / Tahoe Series User Manual California Instruments 3. Set load for the high-range resistance for 90% of the rated current, appropriate for the Series model that is to be aligned. 4. Enter the calibration password with the SCPI command CAL:PASS “5000”. 5.

  • Page 369: Output Current Measurement High-Range Offset Alignment, Dc-Mode

    Sequoia / Tahoe Series User Manual California Instruments 9. Send the SCPI command INST:NSEL 2, and repeat Step-4 through Step-8 to align Phase-B. 10. Send the SCPI command INST:NSEL 3, and repeat Step-4 through Step-8 to align Phase-C. 10.2.22 Output Current Measurement High-Range Offset Alignment, DC-Mode 1.

  • Page 370: Output Phase-A Alignment, Auxiliary Unit Relative To Leader Unit (Lks Option Only)

    Sequoia / Tahoe Series User Manual California Instruments meter, Reprogram the calibration phase with the same value obtain from the phase meter with the command CAL:PHASE < numeric value >. You may have to add or subtract 0.4 degree to obtain a phase meter reading of a value near zero. 6.

  • Page 371: Output Phase-B And Phase-C Alignment Relative To Phase-A

    Sequoia / Tahoe Series User Manual California Instruments 5. To the Auxiliary unit, enter the calibration password with the SCPI command CAL:PASS “5000”. 6. Perform the alignment with the SCPI command CAL:PHASE <numeric value>, where the numeric value is derived from phase measurement using the phase meter. Initially, set the phase to zero with the SCPI command CAL:PHASE 0.

  • Page 372: 10.2.26 Alignment Of External Programming Signal For Output Voltage Waveform/Amplitude

    Sequoia / Tahoe Series User Manual California Instruments 7. Repeat Step-5 for output frequencies in the Leader unit of 100 Hz, 200 Hz, 550 Hz, 819 Hz, 905 Hz (Only for HF & EHF Option). and 1500 Hz (Only for EHF Option). with SCPI command FREQ <n>, or the highest frequency of the power source model being aligned.

  • Page 373: Source Mode: External Signal Input Calibration

    Sequoia / Tahoe Series User Manual California Instruments 6. Send the following SCPI command to select Phase-A: INST:NSEL 1. 7. Perform the DC offset alignment with the SCPI command CAL:MEAS:EXT:OFFS:DC 0, with the output off and the external analog input at 0 VDC. Send the SCPI query command *OPC?, to determine when this alignment step has been completed.

  • Page 374: Alignment Of External Programming Signal For Output Voltage Amplitude, Dc Output

    Sequoia / Tahoe Series User Manual California Instruments 4. Send the following SCPI commands to the power source (333 VAC range selected; ALC is off; do not turn on the output at this time). VOLT:ALC OFF OUTP OFF VOLT:RANG 333 CURR 5 VOLT:REF EXT 5.

  • Page 375: Alignment Of External Programming Signal For Output Voltage Amplitude, Ac Output

    Sequoia / Tahoe Series User Manual California Instruments 3. Send the following SCPI commands to the power source (440 VDC range selected; ALC is off; do not turn on the output at this time): OUTP 0 MODE DC VOLT:RANG 440 CURR 5 VOLT:ALC OFF VOLT:REF RPV...
  • Page 376 Sequoia / Tahoe Series User Manual California Instruments the AC output voltage amplitude from zero to full-scale of the selected output voltage range, while the AC output waveform is programmed through the internal reference generator. 1. Connect the signal inputs for Phase-A (Pin-1), Phase-B (Pin-2), and Phase-C (Pin-3) together for connection to the same function generator output in Step-2.

  • Page 377: Alignment Of Output Voltage Monitor, Dc Output

    Sequoia / Tahoe Series User Manual California Instruments 10.2.30 Alignment of Output Voltage Monitor, DC output The Isolated Output Voltage Monitor for getting the scaled-down output voltage is available in the rear panel external analog control signal connector: Phase-A Voltage monitor (VMON) signal output will be obtained at Pin-11;...

  • Page 378: Alignment Of Output Voltage Monitor, Ac Output

    Sequoia / Tahoe Series User Manual California Instruments 10.2.31 Alignment of Output Voltage Monitor, AC output The Isolated Output Voltage Monitor for getting the scaled-down output voltage is available in the rear panel external analog control signal connector: Phase-A Voltage monitor (VMON) signal output will be obtained at Pin-11;...

  • Page 379: Alignment Of Output Current Monitor, Dc Output

    Sequoia / Tahoe Series User Manual California Instruments OUTP 1 17. Perform the adjustment using the command CAL:MON:VOLT:ZERO <numeric value>. The numeric value in the range of 0 to 255. The default value is 127. Adjust until the phase A voltage monitor output reading is 0 VDC +/- 25 mV.

  • Page 380: Alignment Of Output Current Monitor, Ac Output

    Sequoia / Tahoe Series User Manual California Instruments 6. Send the SCPI command INST:NSEL 2, and repeat Step-6 to align Phase-B. 7. Send the SCPI command INST:NSEL 3, and repeat Step-6 to align Phase-C 8. Send the following SCPI command to select Phase-A: INST:NSEL 1 9.
  • Page 381 Sequoia / Tahoe Series User Manual California Instruments 2. With the external DMM set for AC, monitor the output current monitor (IMON) signal at the external analog control signal connector pin (Pin- 6 for Phase A, Pin-7 for Phase B, and Pin 8 for Phase C) with respect to Pin- 9.
  • Page 382 Sequoia / Tahoe Series User Manual California Instruments R = (100*0.90)V / FSC 19. Enter the calibration password with CAL:PASS “5000”. 20. Enable output OUTP 1. Perform the adjustment using the command CAL:MON:CURR:ZERO <numeric value>. The numeric value in the range of 0 to 255. The default value is 127. Adjust until the phase A current monitor output reading to 0 VDC +/- 25 mV.

  • Page 383: Electronic-Load Mode Calibration Procedures

    Sequoia / Tahoe Series User Manual California Instruments 10.3 Electronic-LOAD Mode Calibration Procedures 10.3.1 Preparation for Calibration WARNING! Hazardous voltages exist at the rear of the power source. Care must be taken to avoid contact with the AC input and AC/DC output terminals. Only authorized personnel should perform these procedures.

  • Page 384: Sync:start

    Sequoia / Tahoe Series User Manual California Instruments 6. Query the below command for getting the status of the Sequoia unit. SYNC:STAT? This should give a response as IDLE. Synchronize the Sequoia unit with the Voltage Source by sending the below command or pressing the Sync button from the front panel, refer to the Figure 10-1. SYNC:START Figure 10-1: Dashboard Screen–Electronic load 7.

  • Page 385: Ac Function Ac Current Zero Alignment, Ac-Mode

    Sequoia / Tahoe Series User Manual California Instruments VAC range selected): VOLT:RANGE 166 CURR:ALC OFF MODE AC SYNC:FREQ 60 SYNC:VOLT 150 CURR:PHASE 0 CURR 0 7. Perform the synchronization procedure section 9.3.2 and enable the output of the unit using SCPI command OUTP 1.

  • Page 386: Current Gain Initial Alignment, Ac-Mode, And Dc-Mode

    Sequoia / Tahoe Series User Manual California Instruments 5. Send the following SCPI commands to the power source (220 VDC range selected; ALC off): VOLT:ALC OFF MODE DC VOLT:RANGE 220 SYNC:VOLT 200 CURR:ALC OFF CURR 0 6. Perform the synchronization procedure section 9.3.3 and enable the output of Sequoia unit using SCPI command OUTP 1.

  • Page 387: Phase Shift Calibration

    Sequoia / Tahoe Series User Manual California Instruments CURR:ALC OFF SYNC:VOLT 200 CURR <80% of the rated current> 14. Perform the synchronization procedure section 9.3.3 and enable the output of Sequoia unit using command OUTP 1. 15. Send the following SCPI command to select Phase-A: INST:NSEL 1. 16.

  • Page 388: Alignment Of External Programming Signal For Output Current Amplitude, Dc Output

    Sequoia / Tahoe Series User Manual California Instruments f1,data1,f2,data2,f3,data3,f4,data4,f5,data5,f6,data6,current-cal. 10.3.9 Alignment of External Programming Signal for Output Current Amplitude, DC Output The external analog programming signals for setting the output current (RPV) are available in the External Input/Output Control connector: Phase-A signal input at Pin-1; Phase-B signal input at Pin-2; Phase-C signal input at Pin-3;...

  • Page 389: Alignment Of External Programming Signal For Output Current Amplitude, Ac Output

    Sequoia / Tahoe Series User Manual California Instruments 20. Send the following SCPI commands to select Phase-A: INST:NSEL 1. 21. Perform the ADC RMS gain alignment with the SCPI command CAL:MEAS:EXT:FSC <90% of Full-Scale Current>. Send the SCPI query command *OPC?, to determine when this alignment step has been completed;...
  • Page 390 Sequoia / Tahoe Series User Manual California Instruments 15. Measure the output current of Phase A with an external meter (Power Analyzer) and verify the measured output current is 90% of full-scale current ±2% FSC. 16. If not Send the command CAL:SOUR:EXT:FSC < numerical value> . to adjust the output current by reducing or increasing the numerical value.

  • Page 391: 11. Error And Status Messages

    Sequoia / Tahoe Series User Manual California Instruments 11. ERROR AND STATUS MESSAGES Errors that occur during operation, whether from the front panel or the remote digital interface, will trigger error messages. These messages are displayed on the front panel and stored in the memory allocated to the error message queue.
  • Page 392 Sequoia / Tahoe Series User Manual California Instruments Number Message String Cause Remedy allowed correct command syntax. The command might be inconsistent with The command could not be the mode of operation, such as -200 “Execution error” executed programming frequency when in DC-Mode.
  • Page 393 User setup register contents Save the setup again in the same registers -314 “Save/recall memory lost” lost to restore content. Contact AMETEK Service Department to Hardware configuration -315 “Configuration memory lost” obtain instructions on restoring settings lost configuration data.
  • Page 394 Sequoia / Tahoe Series User Manual California Instruments Number Message String Cause Remedy Contact AMETEK Service Department to “Calibration memory lost” Calibration data lost obtain instructions on restoring calibration data or recalibrate the unit. Start phase angles can only be “Start angle must be the first...

  • Page 395: Table 11-1: Error And Status Messages

    Sequoia / Tahoe Series User Manual California Instruments Number Message String Cause Remedy programming signal exceeds the allowed limits The high DC offset from the Limit the power source DC offset to “Output DC component power source connected to prevent this error, as a high DC offset exceeds limit”...
  • Page 396 Sequoia / Tahoe Series User Manual California Instruments This page is intentionally left blank. M447352-01 REV-B...

  • Page 397: 12. Service

    Sequoia / Tahoe Series User Manual California Instruments 12. SERVICE This section provides information on cleaning and troubleshooting details for different modes of operation in Sequoia/Tahoe series models. 12.1 Cleaning The power supply uses forced convection cooling, which can pull in dust from the surrounding environment. In areas with high dust concentrations, regular cleaning may be necessary to ensure the unit continues to function properly.

  • Page 398: Setting Of Ac/Dc Mode Or Voltage Range Is Not Accepted

    Sequoia / Tahoe Series User Manual California Instruments The current setpoint is low or at zero. Program current setpoint to a higher value. The voltage setpoint is low or at zero. Program the correct output voltage. REMOTE INHIBIT signal is shutting down the Verify that the REMOTE INHIBIT signal is at the correct logic level output.

  • Page 399: Excessive Output Voltage

    Sequoia / Tahoe Series User Manual California Instruments 12.3.2 Excessive Output Voltage Cause Solution Measurement showing set value and output will have 4% extra voltage than set voltage if External Connect external sense wires to the rear panel AC/DC sense leads are not connected if selected in Output/Sense connector.

  • Page 400: Over Voltage Fault

    Sequoia / Tahoe Series User Manual California Instruments 12.4.1 Over Voltage Fault Cause Solution Excess voltage applied by the UUT to the Sequoia unit Check the voltage applied by the UUT is within the voltage range of Sequoia unit 12.4.2 Sync settings error Cause Solution...

  • Page 401: Acronyms

    Sequoia / Tahoe Series User Manual California Instruments ACRONYMS This section provides definitions for the acronyms and abbreviations used in this document. Acronym Full form Description An electrical current that reverses direction periodically, Alternating Current commonly used for power distribution. Automatic Load Control: A function used to automatically Automatic Load Control adjust the load applied to a device under test to maintain...
  • Page 402 Sequoia / Tahoe Series User Manual California Instruments Electrostatic discharge is the release of static electricity when two objects with different electrical charges come Electrostatic discharge into contact. It can damage sensitive electronic components and circuits. An external drive is a storage device connected to the EXTD External drive system through an external port, used to add extra...
  • Page 403 Sequoia / Tahoe Series User Manual California Instruments Optional modules for controlling load behavior, LKM/LKS Load Control Modules especially in varying frequency ranges. LAN Extensions for A standard for controlling instruments over Ethernet. Instrumentation A set of standards used by the U.S. Department of MIL-STD Military Standard Defense for testing and evaluation of equipment.
  • Page 404 Sequoia / Tahoe Series User Manual California Instruments THD is a measure of the distortion in a signal caused by harmonics, which are unwanted frequencies that are Total Harmonic Distortion multiples of the main (fundamental) frequency. It shows how much the signal deviates from a pure sine wave. A logic family used in digital circuits, commonly referring Transistor-Transistor Logic to a type of input used for frequency control.

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