Page 3 California Instruments 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 4 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 5 AMETEK will, at its expense, deliver the repaired or replaced Product or parts to the Buyer. Any warranty of AMETEK will not apply if the Buyer is in default under the Purchase Order Agreement or where the Product, or any part thereof, is as follows: damaged by misuse, accident, negligence or failure to maintain the same as specified ...
Page 6 Testing Applications ..........................3 1.3.1 Power Conditioning Equipment Testing ..................3 1.3.2 Grid Interactive Green Energy and Distributed Power Generation (only for Sequoia Series) ..3 1.3.3 Avionics and Shipboard Electronics Testing ................3 1.3.4 ...
Page 7 Sequoia / Tahoe Series User Manual California Instruments 2.18 Additional Hardware options ....................... 24 2.19 SINK option ............................24 2.20 Frequency Options ..........................25 2.21 Clock and Lock Mode Option ......................25 2.22 ...
Page 8 Sequoia / Tahoe Series User Manual California Instruments 3.8.5 System Relay .......................... 62 3.8.6 Multiple Chassis System Configurations ................. 63 3.8.7 External Sense Connector ...................... 68 3.8.8 RS-232C Serial Interface ......................68 3.8.9 ...
Page 9 Sequoia / Tahoe Series User Manual California Instruments 5.6.2 HOME Screen ........................111 5.6.3 Dashboard Screen Top-Level Menu ..................112 5.6.4 Real-Time Parameter Adjustment ..................114 5.6.5 Output Program Screen ......................114 5.6.6 ...
Page 10 Sequoia / Tahoe Series User Manual California Instruments Waveform Management ......................244 Standard Waveforms ......................... 244 Creating Custom Waveforms ......................244 6.2.1 Viewing Custom Waveforms on the Display ................244 RMS Amplitude Restrictions ......................245 ...
Page 11 Sequoia / Tahoe Series User Manual California Instruments 9.2.8 Output Voltage Measurement DC-Negative Gain Alignment, DC-Mode ....... 275 9.2.9 Output Current Measurement AC Low-Range Gain Alignment, AC-Mode ......275 9.2.10 Output Current Measurement AC High-Range Gain Alignment, AC-Mode ......276 ...
Page 12 Sequoia / Tahoe Series User Manual California Instruments 11.2.4 Setting of AC/DC Mode or Voltage Range is Not Accepted ..........307 11.2.5 Parallel Group Faults When Leader Output Switch is Turned On ........308 11.3 Basic Troubleshooting in Source and Grid Simulator Modes .............
Page 13 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 type ....................8 Figure 2-3: Output current limit characteristics- Continuous ................
Page 14 Sequoia / Tahoe Series User Manual California Instruments Figure 4-6: Remote Inhibit Pinout Diagram......................88 Figure 4-7: Trigger IN Pinout diagram ......................... 88 Figure 4-8: Summary Fault Pinout Diagram ......................89 Figure 4-9: Output On/Off Status Pin-out Diagram ....................90 ...
Page 15 Sequoia / Tahoe Series User Manual California Instruments Figure 5-20. DASHBOARD Screen Top-Level Menu for Source Mode ............. 113 Figure 5-21. Real-Time, Immediate Output Parameter Adjustment ..............114 Figure 5-22. OUTPUT PROGRAM Screen Top-Level Menu ................115 Figure 5-23.
Page 16 Sequoia / Tahoe Series User Manual California Instruments Figure 5-59. CONFIGURATION Menu, PROFILES Sub-Menu ................. 141 Figure 5-60. PROFILES Menu, NAME Sub-Menu ..................... 141 Figure 5-61. User Frequency Limit Settings ...................... 142 Figure 5-62. User Voltage Limit Settings ......................142 ...
Page 17 Sequoia / Tahoe Series User Manual California Instruments Figure 5-98. DC Offset Settings ........................162 Figure 5-99. CONFIGURATION Menu, PROFILES Sub-Menu ................. 162 Figure 5-100. PROFILES Menu, NAME Sub-Menu ..................162 Figure 5-101. User Frequency Limit Settings ....................163 ...
Page 18 Sequoia / Tahoe Series User Manual California Instruments Figure 5-137. LIST Menu, CURRENT DROP Sub-Menu .................. 179 Figure 5-138. LIST Menu, CURRENT SWEEP/STEP Sub-Menu ..............180 Figure 5-139. LIST Menu, CURRENT SURGE/SAG Sub-Menu ................ 182 Figure 5-140. RUN Menu ..........................183 ...
Page 19 Sequoia / Tahoe Series User Manual California Instruments Figure 5-176. Phase Number Settings ......................199 Figure 5-177. Waveform Settings ........................200 Figure 5-178. Range Settings ........................... 201 Figure 5-179. Mode Settings ..........................201 Figure 5-180. ALC Settings ..........................202 ...
Page 20 Sequoia / Tahoe Series User Manual California Instruments Figure 5-215. PONS Range Settings ......................... 218 Figure 5-216. PONS Resistance Settings ......................219 Figure 5-217. PONS Inductance Settings ......................219 Figure 5-218. PONS Capacitance Settings ....................... 219 Figure 5-219.
Page 21 Sequoia / Tahoe Series User Manual California Instruments Figure 5-253. Host Name ..........................236 Figure 5-254. Restore Default ........................... 236 Figure 5-255. CONTROL INTERFACE REMOTE INHIBIT Menu ..............237 Figure 5-256. Ambient Status LED setting Screen ................... 237 ...
Page 22 Sequoia / Tahoe Series User Manual California Instruments Figure 8-15: Output Transient Modes ........................ 263 Figure 8-16: Pulse Transients ..........................264 Figure 8-17: List Transients ..........................264 Figure 8-18: Transients Screen Top-Level Menu ....................265 Figure 8-19: Transients Settings Screen ......................265 ...
Page 24 Sequoia / Tahoe Series User Manual California Instruments Introduction This instruction manual contains information on the installation, operation, and calibration of the SEQUOIA/TAHOE Series power source models with 1-phase/3-phase output. The SEQUOIA/TAHOE Series is the latest generation of switched-mode power sources that provide precise output having high accuracy, low distortion, and fast dynamic response.
Page 25 Sequoia / Tahoe Series User Manual California Instruments 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 26 Global initiatives for green electrical energy generation are accelerating, and the number of devices that can export power to the grid in a distributed manner are on the rise. The Sequoia Series can uniquely act as an ideal grid, regenerating current from PV Inverters, Wind Turbines etc., with nearly complete power recovery.
Page 27 On-Board battery charger load. With 85% of power recovery efficiency, the Sequoia Series not only helps by saving electricity, but also minimizing heat emissions inside the lab. What’s more, the DC source mode and AC sink mode operations of the Sequoia Series make it ready for the bidirectional Vehicle-to-Grid testing.
Page 28 Sequoia / Tahoe Series User Manual California Instruments SEQUOIA Series Models SQ XXXX - 0 0 0 0 0 0 0 Product Series SEQUOIA (SQ) Output Power 0015 = 15000W 0022 = 22500W 0030 = 30000W 0045 = 45000W 0090 = 90000W...
Page 29 Sequoia / Tahoe Series User Manual California Instruments TAHOE Series Models XXXX 1 - 0 0 0 0 0 0 0 Product Series TAHOE (TA) Output Power 0015 = 15000W 0022 = 22500W 0030 = 30000W 0045 = 45000W 0090 = 90000W 0135 = 135000W 0180 = 180000W 0270 = 270000W...
Page 30 Figure 2-1: Energy flow in source mode operation b) SINK - Grid Simulator Mode: This mode is applicable only for SEQUOIA series. TAHOE series does not support this mode. Energy flow is from UUT to facility AC input through SEQUOIA as shown in Figure 2-2. In Grid Simulator Mode SEQUOIA regulates the output voltage to the user set value and works as the grid to UUT.
Page 31 Sequoia / Tahoe Series User Manual California Instruments This mode is applicable only for SEQUOIA series. TAHOE series does not support this mode. Energy flow is from UUT to facility AC input through SEQUOIA as shown in Figure 2-2. In Electronic load mode SEQUOIA regulates the RMS current set by the user and works as the load for UUT.
Page 32 Sequoia / Tahoe Series User Manual California Instruments Constant-Power Mode Operation at higher currents but constant power is possible from 72% of Voltage range (138% of max current) declining to 100% of maximum current at 100 % of voltage range as shown in Section 2.9 and Figure 2-4 Repetitive Peak SQ0030/TA0030 up to 4.5 / other Sequoia/Tahoe models up to 3 times of full scale Current...
Page 33 Sequoia / Tahoe Series User Manual California Instruments Voltage slew rate, < 0.5 V/micro sec typical DC Offset Voltage, < ±20 mVDC Typical Output Noise Low V Range: < 2 VRMS High V Range: < 3 VRMS Bandwidth 20kHz to 1MHz for AC output. Output Coupling DC coupled for 166V/ 333 V range.
Page 34 Sequoia / Tahoe Series User Manual California Instruments Output Electrical Characteristics- AC/DC SINK -Electronic load mode The following output characteristics are applicable only for SEQUOIA model Applicable for all Models Working modes AC, DC Mode Current Range As shown in Section 2.6 and Section 2.7 Current Resolution 0.1% of full scale Current Programming Accuracy...
Page 35 Sequoia / Tahoe Series User Manual California Instruments Refer to Figure 2-3 to find the maximum RMS current allowed for given operating UUT voltage Minimum Capacitance = (0.8% of rated current) / (Operating UUT voltage * 2 *Pi* Maximum Frequency) Resistance Resolution 0.001 ohm till 1 ohm 0.01 ohm >1 ohm to 10 ohm...
Page 36 Sequoia / Tahoe Series User Manual California Instruments SQ0450/ 5 x SQ0090 450.5 681.8 340.9 TA0450 5 x TA0090 SQ0540/ 6 x SQ0090 1081.2 540.6 818.2 409.1 TA0540 6 x TA0090 Output Power and current ratings – Single Phase The following output characteristics are common for Source mode, SINK-Grid simulator mode, and SINK- Electronic Load mode (SEQUOIA and TAHOE models) Model Output Power...
Page 37 Sequoia / Tahoe Series User Manual California Instruments Output current limit characteristics – Constant Power Mode Operation at higher currents but constant power is possible from 72% of Voltage range (138% of max. current) declining to 100% of maximum current at 100 % of voltage range. Output current limit characteristics are applicable for Source and Sink operating Modes, Refer to Figure 2-4.
Page 38 Sequoia / Tahoe Series User Manual California Instruments SQ0360/ 4 x SQ0090 1000 TA0360 4 x TA0090 SQ0450/ 5 x SQ0090 1250 TA0450 5 x TA0090 SQ0540/ 6 x SQ0090 1500 1128 TA0540 6 x TA0090 Table 2-1: Full – Scale current rating for different power models 2.10 SINK- Electronic Load mode –...
Page 39 Sequoia / Tahoe Series User Manual California Instruments SQ0450 SQ0540 Table 2-3: Resistance range for different models- Three Phase DC mode Model Inductance Range (per phase) – AC mode Minimum Inductance (uH) Maximum Inductance (mH) 166 V 333 V 166 V 333 V SQ0022 1179...
Page 40 Sequoia / Tahoe Series User Manual California Instruments Model Resistance Range (per phase)- AC Mode Minimum Resistance Maximum Resistance (Milli Ohms) (Ohms) 166 V 333 V 166 V 333 V SQ0022 1234 SQ0030 SQ0045 SQ0090 With one chassis Table 2-6: Resistance range for different models- Single Phase -AC mode Model Resistance Range (per phase)- DC Mode Minimum Resistance...
Page 41 Sequoia / Tahoe Series User Manual California Instruments SQ0045 20679 5161 SQ0090 With one chassis 41359 10339 Table 2-9: Capacitance range for different models- Single Phase AC-Mode 2.12 AC Input Specifications Model Line VA Line current Inrush current SQ0022 / 26KVA 89 ARMS @ 187 VLL 153 Apk @ 208 VLL...
Page 42 Sequoia / Tahoe Series User Manual California Instruments TA0180 its own AC service. Total Line its own AC service. Total peak currents are 2 x SQ0090/TA0090 currents are 2 x SQ0090/TA0090 SQ0270 / 336KVA Each SQ0090 chassis requires Each SQ0090 chassis requires TA0270 its own AC service.
Page 43 Sequoia / Tahoe Series User Manual California Instruments 2.13 AC Output Measurements Measurement specifications apply to SQ0022 & TA0022 / SQ0030 & TA0030 / SQ0045 & TA0045 / SQ0090 & TA0090 in three-phase mode. See notes for other models and configurations. Parameter Range Resolution...
Page 44 Sequoia / Tahoe Series User Manual California Instruments 2.14 Harmonics Measurements Measurement specifications apply to SQ0022 & TA0022 / SQ0030 & TA0030 / SQ0045 & TA0045/ SQ0090 & TA0090 in three-phase mode. See notes for other models and configurations. Parameter Range Resolution Accuracy ()
Page 45 Sequoia / Tahoe Series User Manual California Instruments SQ0045 & TA0045 1% FS 10 W Power 0 - 30 kW per output SQ0090 & TA0090 Note: For current and power measurements, specifications apply from 5% to 100% of measurement range. Current and Power range and accuracy specifications are times three for SQ0022 & TA0022, SQ0030&...
Page 46 Sequoia / Tahoe Series User Manual California Instruments Current Limit Modes Two selectable modes of operation: Constant Voltage/ Constant Current mode, voltage folds back with automatic recovery Constant Voltage/ Current limit (Relays open) Automatic Level Control User-selectable ALC operation enables a digitally implemented feedback (ALC) control loop to precisely regulate the RMS value of the output voltage.
Page 47 Sequoia / Tahoe Series User Manual California Instruments Automatic Level Control User-selectable ALC operation enables a digitally implemented feedback (ALC) control loop to precisely regulate the RMS value of the output current. Output could be controlled to produce transient events with 500 µs Transient Generator- programming resolution: SINK- Electronic Load Mode...
Page 48 Sequoia / Tahoe Series User Manual California Instruments 2.20 Frequency Options High frequency option: output frequency range of 16 Hz to 905 Hz. HF, option Note: With HF option installed, during SINK mode (Grid simulator and electronic load) frequency would be restricted to 550 Hz. High frequency and reduced frequency control option is combined.
Page 49 Sequoia / Tahoe Series User Manual California Instruments Signal input for output current amplitude programming of waveform that is set by internal External Analog controller reference; Programming of Signal ranges: 0-10 VDC for zero to full-scale RMS of internally programmed output Output Current current;...
Page 50 Sequoia / Tahoe Series User Manual California Instruments 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: 50V, maximum peak voltage; 0.1A, maximum current; 2.5Ω, maximum resistance;...
Page 51 Sequoia / Tahoe Series User Manual California Instruments 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. OUTPUT switch: turns output of the unit on/off. OUTPUT LED: integrated into the OUTPUT switch;...
Page 52 Sequoia / Tahoe Series User Manual California Instruments System interface, Control signal interface on Leader unit (or previous Follower unit) going to Follower Leader unit for multi-chassis operation; connector: high-density, 37-contact, female D-Type System relay Single row six pole terminal block is located on the rear panel Interface for remote-control of Leader / Follower configurations and Emergency Stop Signal output with dual function, either function trigger or list trigger;...
Page 53 Sequoia / Tahoe Series User Manual California Instruments Relative Humidity 0-95 % RAH, non-condensing maximum for temperatures up to 31C decreasing linearly to 50% at 40C. Vibration Designed to meet ISTA 1B transportation levels. Shock Designed to meet ISTA 1B transportation levels. Transportation integrity ISTA Test Procedure 1B 2.28...
Page 54 Sequoia / Tahoe Series User Manual California Instruments 2.30 Firmware/Software Options Option Description Avionics Electrical Power Quality Test Software Package. AVSTD, (MC) includes 160 (RTCA/DO160 E/F/G), 704 (MIL-STD 704 A/B/C/D/E/F), ABD (Airbus ADB100.1.8 D/E), A350 (Airbus ADB100.1.8.1 B/C). Avionics Electrical Power Quality Test Software Package; includes AVSTD, AVALL, (MC) B787 (Avionics Electrical Power Quality Test Software;...
Page 55 Sequoia / Tahoe Series User Manual California Instruments Full-Scale ( Per Phase) AC mode RMS (A) Peak (A) SQ0022/ 22.5 TA0022 SQ0030/ TA0030 SQ0045/ TA0045 SQ0090/ 2 x SQ0045 TA0090 2 x TA0045 1 x SQ0090 1 x TA0090 SQ0135/ 3 x SQ0045 TA0135 3 x TA0045...
Page 56 Sequoia / Tahoe Series User Manual California Instruments are in Table 2-14 and Table 2-15 respectively. In -XVC option range only Source and SINK-grid simulator operating modes are supported (SINK-Electronic Load operating mode is not supported). Output current limit characteristics are shown in Figure 2-5. All Models Working mode AC Mode...
Page 57 Sequoia / Tahoe Series User Manual California Instruments 2.33 XVC - 666 Option Specifications The –XVC option provides an AC only output range of 0 to 666 Vac L-N. Common specifications for all models are given in Table 2-16. Current ratings for different power models for 3-phase and 1-phase mode are in Table 2-17 and Table 2-18 respectively.
Page 58 Sequoia / Tahoe Series User Manual California Instruments Table 2-18 : Phase output Current and Power specifications for -XVC 666 option-Single phase 2.34 XVC - 721 Option Specifications The –XVC option provides an AC only output range of 0 to 721 Vac L-N. Common specifications for all models are given in Table 2-19.
Page 59 Sequoia / Tahoe Series User Manual California Instruments AC mode RMS (A) Peak (A) SQ0090/ TA0090 Table 2-21: Phase output Current and Power specifications for -XVC 721 option- Single phase Figure 2-5: Output current limit characteristics- XVC option 2.35 -HF Option Specifications The -HF option extends the maximum available output frequency from 550 Hz to 905 Hz.
Page 60 Sequoia / Tahoe Series User Manual California Instruments Low Voltage Range Maximum voltage at 905 Hz is 159 Vrms Maximum frequency at 166 Vrms is 875 Hz See Figure 2-6 -XVC 444 Voltage Range Maximum voltage at 905 Hz is 425.3 Vrms Maximum frequency at 444 Vrms is 875 Hz.
Page 61 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 62 Sequoia / Tahoe Series User Manual California Instruments Figure 3-1: The Sequoia/Tahoe Power Source CAUTION! Do not connect 400V or 480V into a unit set for 208V or 230V unit, the result could be a severely damaged unit. Always check the input rating on the model number tag before connecting AC input power.
Page 63 Sequoia / Tahoe Series User Manual California Instruments Mechanical Installation The Sequoia/Tahoe Series are completely self-contained power sources. They are to be used free standing on a solid surface. The units are fan cooled, drawing air in from the front and exhausting at the rear.
Page 64 Sequoia / Tahoe Series User Manual California Instruments Figure 3-3: Rear Panel Input/Output Protective Cover Installation 3.4.2 Overall Dimensions for Installation Figure 3-4: Overall Dimension Drawing of Standalone Model M447352-01 REV-A...
Page 65 Sequoia / Tahoe Series User Manual California Instruments AC Input Connections and Wiring Three-phase Delta or Wye AC input voltage of sufficient amperage (consult AC input specifications for maximum AC current per phase) is required to power the Sequoia/Tahoe Series. The Power supply front panel POWER switch does not disconnect the AC input line from the unit.
Page 66 Sequoia / Tahoe Series User Manual California Instruments Figure 3-5 shows the rear panel view of the connector and ground stud for models having an AC input with 3-wire plus ground. Table 3-1 shows the functions and connector pinout, and Table 3-2 the connector type. A 3-phase, 3-wire input is connected to A, B and C and a safety ground connection must always be made to the utility earth protection-ground using the rear panel safety-ground stud located adjacent to the AC input connector.
Page 67 Sequoia / Tahoe Series User Manual California Instruments 10% - 208 V 10% - 230 V 10% - 380 V AC INPUT L3 AC Input Line-3 input from utility AC mains 10% - 400 V 10% - 480 V 3-Phase, Line-Line Safety Safety-Ground connection from utility earth protection-ground...
Page 68 Sequoia / Tahoe Series User Manual California Instruments The main source must have a current rating equal to or greater than the input fuses and the input wiring must be sized to satisfy the applicable electrical codes. The rear cover must be re-installed prior to use and the strain relief provisions located at the rear bottom of the unit must be used to maintain protection against hazardous conditions.
Page 69 Sequoia / Tahoe Series User Manual California Instruments The input power cables and protective circuit breaker used must be large enough to handle the input current and input voltage of the power source and must conform to local electrical codes. Consult a qualified electrician prior to installation.
Page 70 Sequoia / Tahoe Series User Manual California Instruments 0.100 4.00 0.063 3.47 0.040 3.00 0.025 2.38 0.020 2.30 0.016 2.08 0.012 1.74 0.0098 1.67 0.0078 1.52 0.0062 1.40 0000 0.0049 1.27 Table 3-4: Wire Resistance and Voltage Drop CAUTION! Capacitors in the power source may hold a hazardous electrical charge even if the power source has been disconnected from the mains supply.
Page 71 Sequoia / Tahoe Series User Manual California Instruments CAUTION! If any Sequoia/Tahoe system failure has occurred on any part of the system, AC input power must be removed immediately and not restored until the system has been inspected by a qualifier service technician.
Page 72 Sequoia / Tahoe Series User Manual California Instruments Figure 3-8: 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 EUT changes frequently, you may want to consider using some quick disconnect scheme external to the chassis so it will not be necessary to power down the UUT and remove the rear covers.
Page 73 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, Types: TBS SA, SIS, THW, THWN, XHHW, FEP, FEPB, MI, RHH, USE, ZW THHN, THHW, XHH, XHHW Current Rating, A(RMS) 0000 Table 3-5: Suggested Output Wiring Sizes for each Sequoia/Tahoe Cabinet...
Page 74 Sequoia / Tahoe Series User Manual California Instruments 0.0062 1.40 0000 0.0049 1.27 Table 3-6: Wire Resistance and Voltage Drop CAUTION! When the unit is working in the DC Mode of operation all the three-phase output return current will be flowing through the Neutral wire present in TB1B, as a result, use appropriate wire gauges.
Page 75 Sequoia / Tahoe Series User Manual California Instruments Figure 3-9: Location of Output Terminals Refer to Figure 3-9 for a view of the connector, Table 3-8 for the pinout and functions, and Table 3-9 for the connector type for three phase output terminal block. Name Type Range...
Page 76 Sequoia / Tahoe Series User Manual California Instruments Wire cross section: 2.5 mm , min (14 AWG) to 6 mm , max (10 AWG). Table 3-9. AC/DC Three-Phase Output Connector Type Refer to Figure 3-9 for a view of the connector, Table 3-10 for the pinout and functions, and Table 3-11 for the connector type for single phase output terminal block.
Page 77 Sequoia / Tahoe Series User Manual California Instruments 3.7.3 Single Phase mode Output Wiring Diagram Figure 3-10 shows the required output connections for a single-phase mode output configuration (rear- view perspective). See section 3.7.4 for the three-phase mode. Always disconnect all input power from the UUT before removing the rear panel cover that provides access to the input and output terminal connections.
Page 78 Sequoia / Tahoe Series User Manual California Instruments 3.7.4 Three Phase mode Output Wiring Diagram Figure 3-11 shows the required output connections for a three-phase mode output configuration (rear-view perspective). See section 3.7.3 for the single-phase mode. Always disconnect all input power from the UUT before removing the rear panel cover that provides access to the input and output terminal connections.
Page 79 Sequoia / Tahoe Series User Manual California Instruments Connectors - Rear Panel A number of connectors are located along the top rear covers. These connectors are in a recessed area to protect them from shipment damage, refer to Figure 3-12. Figure 3-12: Rear Panel Connectors 3.8.1 System Interface...
Page 80 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 3-12. External Leader/Follower System Interface Connector Type Function Characteristics Control signal interface on Leader unit (or other Follower units if more Leader Interface than two units comprise the multi-phase / parallel-group) going to Follower unit for multi-chassis parallel operation;...
Page 81 Sequoia / Tahoe Series User Manual California Instruments NOTE: SYNC input is not supported in SINK-Electronic Load operating mode Signal inputs for Auxiliary Clock and Logic signals used in synchronizing two or more AC sources; logic level, TTL-compatible; LKS (Option) rear panel BNC connectors for each signal;...
Page 82 Sequoia / Tahoe Series User Manual California Instruments safety isolation SELV-rated. NOTE: Not available with FC option and also not available with LKM and LKS option NOTE: SYNC input is not supported in SINK-Electronic Load operating mode Monitors state of the output relay. Isolated TTL output. High if output relay is closed, low if Output Status output relay is open Signal input to turn the output on/off;...
Page 83 Sequoia / Tahoe Series User Manual California Instruments MODULATION Analog 0-5V External modulation signal input terminal for Phase-B. REFERENCE - B Input (RMS) MODULATION Analog 0-5V External modulation signal input terminal for Phase-C. REFERENCE - C Input (RMS) ISO_COM Return Return Common ground Table 3-18.
Page 84 Sequoia / Tahoe Series User Manual California Instruments safety isolation SELV-rated, referenced to chassis; Isolated Output Signal outputs for each output phase for monitoring the waveform of the command signal Voltage of the output amplifier; Monitor Outputs 0-7.07V(RMS) signal range for zero to full-scale output voltage; Isolated Output Signal outputs for each output phase for monitoring the waveform of the command signal Current...
Page 85 Sequoia / Tahoe Series User Manual California Instruments Signal outputs for output phase C for monitoring Output Voltage Analog 0-7.07 V(RMS) the waveform of the command signal of the Monitor - C Output output amplifier. Common Ground: Pins 4, 9, and 14 are ISO_COM Return Return...
Page 86 Sequoia / Tahoe Series User Manual California Instruments 3.8.6 Multiple Chassis System Configurations The Sequoia / Tahoe power source has the capability to be configured in multi-chassis groups with multiple-phase outputs using the optional Clock/Lock signal interface. The sources are individually programmed for output voltage/current, while the Clock/Lock interface ensures frequency and phase synchronization between units.
Page 87 Sequoia / Tahoe Series User Manual California Instruments 3.8.6.2 Parallel System The connections to set up a parallel group of units require the output lines PHASE-A, PHASE-B, PHASE- C, and RTN to be connected together from each unit to an external terminal block. If the remote sense is used, only the Leader unit has it connected to the load at the point where precise regulation of the output voltage is desired;...
Page 88 Sequoia / Tahoe Series User Manual California Instruments Figure 3-17: Connections for 3-Phase Parallel Group Between Two Chassis M447352-01 REV-A 3-65...
Page 89 Sequoia / Tahoe Series User Manual California Instruments Figure 3-18: Connections for 3-Phase Parallel Group Between Three Chassis 3-66 M447352-01 REV-A...
Page 90 Sequoia / Tahoe Series User Manual California Instruments Figure 3-19: Connections for 3-Phase Leader/Auxiliary Multi-Phase Group M447352-01 REV-A...
Page 91 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. Figure 3-20: RS-232C Interface Connector...
Page 92 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 93 Sequoia / Tahoe Series User Manual California Instruments Table 3-28: LAN Interface Connector Type EIA/TIA 568B Pin # Ethernet Signal EIA/TIA 568A Crossover Transmit/Receive Data 0 + White with green stripe White with orange stripe Transmit/Receive Data 0 - Green with white stripe or Orange with white stripe or solid green solid orange...
Page 94 Sequoia / Tahoe Series User Manual California Instruments Pin # GPIB Signal Description End- Or- Identity Data Valid NRFD Not Ready for Data NDAC Not Data Accepted Interface Clear Service Request Attention SHIELD Tied to Digital Ground DIO5 Data Input/ Output bit DIO6 Data Input/ Output bit DIO7...
Page 95 Sequoia / Tahoe Series User Manual California Instruments Signal inputs in Auxiliary units for Clock and Lock that are used to synchronize two or more sources; CLOCK sets the frequency, while LOCK sets the phase; logic level, LKS (Option) TTL-compatible; individual rear panel BNC connectors for each signal; safety isolation SELV-rated, referenced to chassis.
Page 96 Sequoia / Tahoe Series User Manual California Instruments Figure 3-25: Functional Test Setup M447352-01 REV-A...
Page 97 Sequoia / Tahoe Series User Manual California Instruments Operation The Sequoia / Tahoe Series power supply provides extensive functionality and programmability, which could be utilized through the front panel, remote digital interface, and the remote analog/digital control interface. The front panel includes a graphical, touch-screen display utilizing a menu-driven interface for simplified operation of the unit and quick access to sophisticated functions.
Page 98 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;...
Page 99 4.1.2 Grid Simulator Mode NOTE: This mode applies only to the SEQUOIA series. TAHOE series does not support this mode of operation. The Grid simulator mode enables Sequoia AC Sources to sink current from the unit under test. This mode of operation is particularly useful when testing grid-tied products that feed energy back onto the grid.
Page 100 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 101 Sequoia / Tahoe Series User Manual California Instruments 3. Connect the output of UUT (PV / grid-tie Inverter) to the output of Sequoia. 4. Turn on the AC mains, and then turn on the POWER switch from the Sequoia front panel. 5.
Page 102 4.1.3 eLoad Mode NOTE: This mode applies only to the SEQUOIA series. TAHOE series does not support this mode. Energy flow is from UUT to facility AC input through SEQUOIA as shown in Figure 4-3. In Electronic load mode, SEQUOIA regulates the RMS current set by the user and works as the load for UUT.
Page 103 This could be accomplished through the front panel display by navigating to the appropriate menu, entering the desired values, performing the synchronization, and enabling the output; alternately, the remote digital interface could be used with SCPI commands (refer to the Sequoia Series Programming Manual P/N M447353-01)
Page 104 Sequoia / Tahoe Series User Manual California Instruments 4. If not, navigate to the operating mode screen and press the SINK-eLoad button. 5. Upon pressing the SINK-eLoad button, the programming modes will be displayed that are available for the eLoad operating mode. Refer to section 5.4.3. ...
Page 105 Sequoia / Tahoe Series User Manual California Instruments 12. Navigate to the CONFIGURATION MENU screen – SYNC SETTINGS screen and Enter the measured value of each phase as the sync phase sequence value of the Sequoia. refer to the below image. 13.
Page 106 Sequoia / Tahoe Series User Manual California Instruments WARNING! When performing the Sequoia unit in eLoad operating mode make sure that the UUT voltage range is compatible with the Sequoia Voltage range and operate the Sequoia unit with the appropriate voltage range to protect against hazardous voltages that are present on the input and output.
Page 107 Sequoia / Tahoe Series User Manual California Instruments 8. Set the Sequoia current and phase shift from the front panel dashboard screen and enable the output (make sure that UUT current limit is greater than the Sequoia current set value). 9.
Page 108 Sequoia / Tahoe Series User Manual California Instruments 9. Enable the output of the Sequoia and measure the output voltage and current of each phase and calculate the resistance for each phase (make sure that UUT current limit is greater than 50% rated value of the Sequoia).
Page 109 Sequoia / Tahoe Series User Manual California Instruments External I/O Control Signal Connector The Sequoia/Tahoe power supply is provided with an External I/O Control Signal 15-pin connector on the rear panel. This section contains the setup and operating configuration of Output ON/OFF Status, External Synchronization, Fault status, Remote inhibit, External Analog Modulation of Output Voltage, and Trigger Functions.
Page 110 Sequoia / Tahoe Series User Manual California Instruments MODULATION Analog ±7.07V External modulation signal input terminal for Phase-C. REFERENCE - C Input Isolated signal return / Common ground terminal for ISO_COM Return Return Pins 4, 5, 11, 12, 13, and 14. Table 4-1: External Input/ Output Control Connector Pinout 4.2.1 External Synchronization...
Page 111 Sequoia / Tahoe Series User Manual California Instruments logic-high (or user-selectable logic-low) turns the output on. This mode is equivalent to using the Output On/Off button on the front panel. The power source ignores the external Remote Inhibit input and allows the user to turn On/Off the output irrespective of the logic level (logic-low / logic-high).
Page 112 Sequoia / Tahoe Series User Manual California Instruments 4.2.4 Summary Fault Signal The Summary Fault signals, SUMMARY FAULT (Pin-6) and SUMMARY FAULT RETURN (Pin-7) signals provides an indication of abnormal condition occurrence. A summary fault signal with a high state (applied Vcc) indicates that there is no fault present, and a Low state (0V / short) indicates that fault is present, refer to Figure 4-8.
Page 113 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 485V so that the signal peak would not go beyond 485 V in the HIGH range and 242.5 V in the LOW range.
Page 114 Sequoia / Tahoe Series User Manual California Instruments Figure 4-11: Modulation Reference Signal Pinout diagram for Phase B 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 115 External Analog Programming of Output Voltage Waveform (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. M447352-01 REV-A...
Page 116 Sequoia / Tahoe Series User Manual California Instruments This is an alternative method where the user can program the output voltage based on the AC waveform provided to the External Reference Signal pins. In this function, the output frequency is limited to 550 Hz for the HF + FC frequency option units.
Page 117 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 118 External Analog Programming of Output Current Amplitude (eLoad – Current programming Mode) NOTE: This function is available only for eLoad – Current Programming Mode for SEQUOIA Series Power Supply and not in TAHOE Series. This is an alternative method where the user can program the output current based on the DC voltage provided to the External Reference Signal pins.
Page 119 Sequoia / Tahoe Series User Manual California Instruments Similarly, applying an external DC Voltage of the range between -10VDC to +10VDC to the External Analog Control Signal Connector can provide the output current to scale between +/- full-scale current based on the Range selected for DC Mode.
Page 120 Sequoia / Tahoe Series User Manual California Instruments Figure 4-22: Output Voltage Monitor Pinout Diagram for Phase C 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 could 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 121 Sequoia / Tahoe Series User Manual California Instruments Figure 4-25: Output Current Monitor Pinout Diagram for Phase C M447352-01 REV-A...
Page 122 Sequoia / Tahoe Series User Manual California Instruments Front Panel Operation Figure 5-1 shows a view of the front panel. Refer to Table 5-1 for functional descriptions of the Enhanced front panel. Figure 5-1. Front Panel Front Panel Controls and Indicators Item Reference Functional Description...
Page 123 To set up the power source for basic operation with either a sine wave or DC output, perform the following sequence: Source Mode: (Applicable for Sequoia series and Tahoe 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 124 11. The output could be turned on with the front panel OUTPUT switch. eLoad Mode: Current 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 125 SYNCED with a green color background. 8. The output could be turned on with the front panel OUTPUT switch. eLoad 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 126 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 could be 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 127 Sequoia / Tahoe Series User Manual California Instruments 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. Tapping on a phase button toggles the selection of that phase for inputting values. When a phase is selected, its button is displayed with a green color.
Page 128 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 129 Sequoia / Tahoe Series User Manual California Instruments Parameter values, such as voltage and current, are adjusted by selecting the parameter (tapping on it) to enable the selection field (refer to Figure 5-8). If a parameter had been selected whose value could 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 5-9).
Page 130 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 could also be used with the numeric keypad to enter values. After selecting a parameter using the touch-screen, the numeric keypad will be displayed;...
Page 131 The HOME button will return to the HOME screen that has the top-level menu for the sub-menu being displayed; for the PROTECTION screen top-level menu, is the HOME Screen. NOTE: This feature applies only to the SEQUOIA series. TAHOE series does not support this mode of operation.
Page 132 Sequoia / Tahoe Series User Manual California Instruments 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. Figure 5-12.
Page 133 Sequoia / Tahoe Series User Manual California Instruments RMS Power programming: The user can program the Active power and the Reactive Power required as a load for the UUT. Figure 5-14. eLoad – Power Programming Parallel RLC programming: The user can program the Resistance, Inductance and Capacitance required as a load for the UUT.
Page 134 Sequoia / Tahoe Series User Manual California Instruments Home Screen Top-Level Menu - (Source Mode) 5.6.1 Banner Screen Figure 5-16: Banner Screen for Source Mode – SEQUOIA Figure 5-17: Banner Screen – TAHOE Series 5.6.2 HOME Screen Figure 5-18: HOME Screen for Source Mode – SEQUOIA M447352-01 REV-A...
Page 135 Sequoia / Tahoe Series User Manual California Instruments Figure 5-19. HOME Screen – TAHOE Series 5.6.3 Dashboard Screen Top-Level Menu The DASHBOARD screen top-level menu is used to change output parameters and simultaneously view output measurements. The most commonly used output parameters are located in the DASHBOARD screen menu.
Page 136 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 is within the allowed range, otherwise, an error will be generated, and the value will not be accepted.
Page 137 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 138 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 is within the allowed range, otherwise, an error will be generated, and the value will not be accepted.: Entry Description...
Page 139 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 140 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 141 Sequoia / Tahoe Series User Manual California Instruments Figure 5-28.Transients Settings. The SETTINGS menu has the following fields: 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; the default units are in seconds.
Page 142 Sequoia / Tahoe Series User Manual California Instruments Figure 5-29. SETTINGS Screen, TRIGGER Sub-Menu The TRIGGER sub-menu has the following fields: Entry Description Phase Sync TRIGGER sub-menu: Determines when phase synchronization is done; the default phase sync is All: All: Synchronization is done at the beginning of the transient list or pulse, for every count.
Page 143 Sequoia / Tahoe Series User Manual California Instruments Figure 5-30. LIST Menu, With Empty Buffer Figure 5-31. LIST Menu, With Transient List Entry The LIST menu has the following fields: Entry Description Allows generating of a new transient list. Before Inserts a step before the selected transient step.
Page 144 Sequoia / Tahoe Series User Manual California Instruments AC Mode DC Mode Figure 5-32. LIST Menu, ADD Sub-Menu The ADD sub-menu has the following fields: Entry Description DROP Causes the output voltage to go to zero volts for a specified period.
Page 145 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 146 Sequoia / Tahoe Series User Manual California Instruments Figure 5-36. 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. Surge is a change to a higher value, while sag is a change to a lower value.
Page 147 Sequoia / Tahoe Series User Manual California Instruments Figure 5-38. 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 and frequency simultaneously. While this transient is programmed as a single transient step, two list entries are required store...
Page 148 Sequoia / Tahoe Series User Manual California Instruments Figure 5-40. Volt/Freq Delay Settings – AC Mode Figure 5-41. Volt/Freq Delay Settings – DC Mode 5.6.6.3 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.
Page 149 Sequoia / Tahoe Series User Manual California Instruments 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 150 Sequoia / Tahoe Series User Manual California Instruments Func(tion) Selects the waveform to be used during this section of the transient sequence. Each section could use a different waveform from the available user-defined waveforms or the three standard waveforms. The output waveform changes upon entry into each section and remains in effect for the duration of the section.
Page 151 Sequoia / Tahoe Series User Manual California Instruments Rep(ea)t Sets the number of times the surge/sag transient event will be repeated before execution will proceed to the next event or exit the transient list. The number of times the transient event is generated is equal to the value, REPEAT+1.
Page 152 Sequoia / Tahoe Series User Manual California Instruments T(ime) Sets the time, in seconds or cycles, that it will take for the output frequency to reach the level set in the F(requency) field (end voltage). As such, the T(ime) value will define the slew rate of the output frequency for the event.
Page 153 Sequoia / Tahoe Series User Manual California Instruments Figure 5-46. LIST Menu, FREQUENCY SURGE/SAG Sub-Menu The FREQUENCY 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 the level set in the F(requency) field. F(requency) Sets the frequency, in hertz, that will be reached during the surge or sag time duration.
Page 154 Sequoia / Tahoe Series User Manual California Instruments 5.6.6.8 VOLT/FREQ SWEEP/STEP Sub-Menu The VOLT/FREQ SWEEP/STEP menu allows combining voltage and frequency sweep/step changes into a single transient event. The effect is that of changing the output voltage and frequency simultaneously. While this transient is programmed as a single event, two list entries are required to store this information.
Page 155 Sequoia / Tahoe Series User Manual California Instruments Delay Sets the time duration, in seconds or cycles, that the voltage amplitude and frequency will stay at the V(olts) and F(requency) levels, before the next transient event is executed, or the transient list is completed.
Page 156 Sequoia / Tahoe Series User Manual California Instruments Func(tion) Selects the waveform to be used during this section of the transient sequence. Each section could use a different waveform from the available library of user-defined waveforms or the three standard waveforms. The output waveform changes upon entry into each section and remains in effect for the duration of the section.
Page 157 Sequoia / Tahoe Series User Manual California Instruments Figure 5-49. 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 158 Sequoia / Tahoe Series User Manual California Instruments Figure 5-50. RUN Menu The RUN menu has the following fields: Entry Description Continuous Causes the transient execution to continue indefinitely. The execution must be stopped manually. X Times Determines the number of times a transient list is repeated. The default value is zero, which means the programmed list runs only once.
Page 159 Sequoia / Tahoe Series User Manual California Instruments Figure 5-51. CONFIGURATION Screen Top-Level Menu 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 160 Sequoia / Tahoe Series User Manual California Instruments Figure 5-52. Voltage Protection Settings PHASE NUMBER Programs the output phase configuration: One-Phase or Three-Phase. The default is Three-Phase. Figure 5-53. Phase Number Settings WAVEFORM Selects the waveform for the output voltage: either standard waveforms for sine wave, square wave, clipped-sine wave;...
Page 161 For information on generating user-defined waveforms and their selection, refer to the 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.
Page 162 Sequoia / Tahoe Series User Manual California Instruments Figure 5-56. 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 163 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 164 Sequoia / Tahoe Series User Manual California Instruments Figure 5-58. 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, could be stored; refer to Figure 5-59. Subsequently, a profile could be loaded to automatically set the unit to that particular configuration.
Page 165 Sequoia / Tahoe Series User Manual California Instruments USER F-LIMITS Sets soft limits for the minimum and maximum output frequency to which the unit could be programmed using the front panel or remote digital interface; the default is full-scale. Figure 5-61. User Frequency Limit Settings USER V-LIMITS Sets soft limits for the minimum and maximum output voltage to which the unit could be programmed using the front panel or...
Page 166 Sequoia / Tahoe Series User Manual California Instruments PONS The PONS (Power ON Settings) menus allow setting the conditions that would be present after power up; refer to Figure 5-64. The AC input has to be cycled off/on for a change in a PONS setting to take effect.
Page 167 Sequoia / Tahoe Series User Manual California Instruments Figure 5-65. PONS Voltage 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 5-66.
Page 168 Sequoia / Tahoe Series User Manual California Instruments PONS CURRENT PONS menu: Sets the value of the output current; the default is full-scale for the model. Figure 5-68. PONS Current Settings PONS FREQUENCY PONS menu: Sets the value of the output frequency; the default is 60 Hz.
Page 169 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.
Page 170 Sequoia / Tahoe Series User Manual California Instruments Figure 5-73. 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: Standalone: Derives synchronization from either the user...
Page 171 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 additional programmable parameter, CLIP % THD, Refer to Figure 5-75.
Page 172 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 5-77.
Page 173 Sequoia / Tahoe Series User Manual California Instruments Figure 5-79. 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 174 Sequoia / Tahoe Series User Manual California Instruments Figure 5-81. Default Screen Settings HOME Screen Top-Level Menu - (Grid Simulator Mode) 5.7.1 Banner Screen Figure 5-82. Banner Screen for Grid Simulator Mode 5.7.2 HOME Screen Figure 5-83: HOME Screen for Grid Simulator Mode M447352-01 REV-A...
Page 175 Sequoia / Tahoe Series User Manual California Instruments 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 commonly used output parameters are located in the DASHBOARD screen menu.
Page 176 Sequoia / Tahoe Series User Manual California Instruments 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. Entry Description Setting...
Page 177 Sequoia / Tahoe Series User Manual California Instruments 2. Scrolling to the OUTPUT PROGRAM screen 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 178 Sequoia / Tahoe Series User Manual California Instruments Figure 5-87. Frequency Settings SOURCE CURRENT Programs the output current in RMS value, A(RMS). The default is full-scale for the model. Figure 5-88. Source Current Settings PHASE Programs the phase angle of the output voltage in a standalone unit operating in a 1-Phase configuration;...
Page 179 Sequoia / Tahoe Series User Manual California Instruments Figure 5-89. Phase Settings REGENERATIVE CURRENT Programs the Regenerative current value, (Amperes). Figure 5-90. Regenerative Current Settings 5.7.6 Transients Screen Refer to Section 5.6.6 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.
Page 180 Sequoia / Tahoe Series User Manual California Instruments Figure 5-91. CONFIGURATION Screen Top-Level Menu The following sub-menus are available in the CONFIGURATION menu: Entry Description REGENERATIVE CONTROL UNDER VOLT Sets the EUT shut-off voltage, Active only if the dFREQ listed below is set to zero.
Page 181 Sequoia / Tahoe Series User Manual California Instruments Figure 5-92. Regenerative Control Settings PHASE NUMBER Programs the output phase configuration: One-Phase or Three-Phase. The default is Three-Phase. Figure 5-93. 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 182 PONSetup:WGRoup <n>, through 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.
Page 183 Sequoia / Tahoe Series User Manual California Instruments Figure 5-96. 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 184 Sequoia / Tahoe Series User Manual California Instruments Figure 5-97. Regulation Settings 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 185 Sequoia / Tahoe Series User Manual California Instruments Figure 5-98. 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, could be stored; refer to Figure 5-99. Subsequently, a profile could be loaded to automatically set the unit to that configuration.
Page 186 Sequoia / Tahoe Series User Manual California Instruments USER F-LIMITS Sets soft limits for the minimum and maximum output frequency to which the unit could be programmed using the front panel or remote digital interface; the default is full-scale. Figure 5-101. User Frequency Limit Settings USER V-LIMITS Sets soft limits for the minimum and maximum output voltage to which the unit could be programmed using the front panel or...
Page 187 Sequoia / Tahoe Series User Manual California Instruments 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 188 Sequoia / Tahoe Series User Manual California Instruments Figure 5-105. PONS Voltage 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 5-106.
Page 189 Sequoia / Tahoe Series User Manual California Instruments PONS CURRENT PONS menu: Sets the value of the output current; the default is full-scale for the model. Figure 5-108. PONS Current Settings PONS FREQUENCY PONS menu: Sets the value of the output frequency; the default is 60 Hz.
Page 190 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 5-111.PONS Regulation menu PONS OUTPUT...
Page 191 Sequoia / Tahoe Series User Manual California Instruments Figure 5-113. 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: Standalone: Derives synchronization from either the user...
Page 192 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 additional programmable parameter, CLIP % THD.
Page 193 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 5-117.
Page 194 Sequoia / Tahoe Series User Manual California Instruments Figure 5-119. 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 195 Sequoia / Tahoe Series User Manual California Instruments Figure 5-121. Default Screen Settings HOME Screen Top-Level Menu - (eLoad Current Programming Mode) 5.8.1 Banner Screen Figure 5-122. Banner Screen for eLoad Current Programming Mode 5.8.2 HOME Screen Figure 5-123: HOME Screen for eLoad -Current Programming Mode M447352-01 REV-A...
Page 196 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 commonly used output parameters are located in the DASHBOARD screen menu.
Page 197 Sequoia / Tahoe Series User Manual California Instruments Entry Description Setting CURRENT Programs the output current required as a load for the UUT. PHASE SHIFT Programs the Phase shift 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 198 Sequoia / Tahoe Series User Manual California Instruments 1. Tapping the OUTPUT PROGRAM screen on the HOME Screen of the front panel touch-screen. 2. Scrolling to the OUTPUT PROGRAM screen 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 199 Sequoia / Tahoe Series User Manual California Instruments Figure 5-128. Phase Shift Settings PHASE FACTOR Programs the Phase factor value required load UUT. Figure 5-129:Power Factor Settings 5.8.6 Current Transients Screen 5.8.6.1 LIST Menu The LIST menu shows the transient list, with sequence numbers that are stored in the transient list buffer. Figure 5-130.
Page 200 Sequoia / Tahoe Series User Manual California Instruments Figure 5-131. LIST Menu, With Transient List Entry The LIST menu has the following fields: Entry Description Allows generating of a new transient list. Before Inserts a step before the selected transient step. Edit Opens the selected step for editing parameters.
Page 201 Sequoia / Tahoe Series User Manual California Instruments DROP Causes the output current to go to zero volts for a specified period of time. As with the step transient, the current change is instantaneous. At the end of the drop, the current will return to the beginning of the step.
Page 202 Sequoia / Tahoe Series User Manual California Instruments Figure 5-135. Current Surge/Sag Settings DELAY Sets the time duration, in seconds or cycles, that the current and frequency will stay at their existing levels before the next transient event is executed or the transient list is complete. Figure 5-136.
Page 203 Sequoia / Tahoe Series User Manual California Instruments The VOLTAGE DROP sub-menu has the following fields: Entry Description T(ime) Sets the time, in seconds or cycles, that the output voltage will dwell at zero. 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 204 Sequoia / Tahoe Series User Manual California Instruments T(ime) Sets the time, in seconds or cycles, that it will take for the output current to reach the level set in the A(mpere) field (end Current). As such, the T(ime) value will define the slew rate of the output current for the event.
Page 205 Sequoia / Tahoe Series User Manual California Instruments Figure 5-139. LIST Menu, CURRENT SURGE/SAG Sub-Menu 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 206 Sequoia / Tahoe Series User Manual California Instruments Figure 5-140. RUN Menu The RUN menu has the following fields: Entry Description Continuous Causes the transient execution to continue indefinitely. execution must be stopped manually. X Times Determines the number of times a transient list is repeated. The default value is zero, which means the programmed list runs only once.
Page 207 Sequoia / Tahoe Series User Manual California Instruments The top-level menu of the CONFIGURATION screen is shown in Figure 5-141. It can be reached in one of two ways: 1. Tapping CONFIGURATION on the HOME Screen of the front panel touch-screen. 2.
Page 208 SCPI command, 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 M447352-01 REV-A...
Page 209 Sequoia / Tahoe Series User Manual California Instruments PPD website, www.programmablepower.com, to download the latest version. Figure 5-145. 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. The output must be turned off to perform a range change.
Page 210 Sequoia / Tahoe Series User Manual California Instruments Figure 5-147. 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 211 Sequoia / Tahoe Series User Manual California Instruments Figure 5-150. PROFILES Menu, NAME Sub-Menu USER CURRENT LIMITS Sets soft limits for the minimum and maximum output voltage to which the unit could be programmed using the front panel or remote digital interface; the default is full-scale. Figure 5-151.
Page 212 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 characteristics; the defaults are Default screen enabled, 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 213 Sequoia / Tahoe Series User Manual California Instruments 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 5-155.
Page 214 Sequoia / Tahoe Series User Manual California Instruments PONS PHASE SHIFT PONS menu: Sets the value of the output Phase shift. Figure 5-158. PONS Phase Shift Settings PONS POWER FACTOR PONS menu: Sets the value of the output Phase factor. Figure 5-159.PONS Power Factor Settings PONS SYNC PONS menu: Programs the Sync Voltage, Sync Phase of each...
Page 215 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 additional programmable parameter, CLIP % THD.
Page 216 Sequoia / Tahoe Series User Manual California Instruments RPV: Enables the external analog interface programming input that sets the amplitude, while the internal waveform generator is used to set the waveform. Figure 5-163. PONS Reference Settings PONS PHASE NUMBER PONS menu: Selects the output configuration, either 1-Phase or 3 Phase, for 3-Phase models;...
Page 217 Sequoia / Tahoe Series User Manual California Instruments HOME Screen Top-Level Menu - (eLoad Power Programming Mode) 5.9.1 Banner Screen Figure 5-166. Banner Screen for eLoad – Power Programming 5.9.2 HOME Screen Figure 5-167: HOME Screen for eLoad – Power Programming Mode 5.9.3 Dashboard Screen Top-Level Menu The DASHBOARD screen top-level menu is used to change output parameters and simultaneously view...
Page 218 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- 1). The HOME button will return to the HOME screen that has the top-level menu for the sub-menu being displayed;...
Page 219 Sequoia / Tahoe Series User Manual California Instruments SYNCHRONIZE Starts the Synchronization between Sequoia and EUT. Once the Synchronization is successful it will display “SYNCED”. Measure VOLTAGE Displays the true RMS value of the output voltage measured at the voltage sense lines. In DC-mode only, the voltage is the DC voltage including polarity.
Page 220 Sequoia / Tahoe Series User Manual California Instruments Figure 5-170. 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 is within the allowed range, otherwise, an error will be generated, and the value will not be accepted.: Entry Description...
Page 221 Sequoia / Tahoe Series User Manual California Instruments Figure 5-172. Reactive Power Settings 5.9.6 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 5-173. It can be reached in one of two ways: 1.
Page 222 Sequoia / Tahoe Series User Manual California Instruments Figure 5-174. 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 223 PONSetup:WGRoup <n>, through 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.
Page 224 Sequoia / Tahoe Series User Manual California Instruments Figure 5-178. Range Settings MODE Selects the mode of operation of output voltage: either AC only, DC only, or AC with a DC offset. This selection also determines the available output voltage ranges: 166/333 V(RMS) in AC and 220/440 VDC in DC mode.
Page 225 Sequoia / Tahoe Series User Manual California Instruments Figure 5-180. ALC Settings PROFILES Selects the operational state of the power source; the default is Profile-0. Up to 15 unique profiles, including transient lists, could be stored; Subsequently, a profile could be loaded to automatically set the unit to that configuration.
Page 226 Sequoia / Tahoe Series User Manual California Instruments USER CURR LIMITS Sets soft limits for the minimum and maximum output voltage to which the unit could be programmed using the front panel or remote digital interface; the default is full-scale. Figure 5-183.
Page 227 Sequoia / Tahoe Series User Manual California Instruments Figure 5-185. CONFIGURATION Menu, PONS Menu The PONS menu has the following fields: Entry Description PONS MODE PONS menu: Selects the mode of operation for the output voltage of the power source: either AC or DC the default is AC. Figure 5-186.
Page 228 Sequoia / Tahoe Series User Manual California Instruments PONS ACTIVE POWER PONS menu: Sets the value of the output active power required as a load for the UUT. Figure 5-188. 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 229 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 additional programmable parameter, CLIP % THD.
Page 230 Sequoia / Tahoe Series User Manual California Instruments Figure 5-193. PONS Phase Number Settings 5.10 HOME Screen Top-Level Menu - (eLoad RLC Programming Mode) 5.10.1 Banner Screen Figure 5-193. Banner Screen for eLoad – RLC Programming Mode 5.10.2 HOME Screen Figure 5-194: HOME Screen for eLoad –...
Page 231 Sequoia / Tahoe Series User Manual California Instruments 5.10.3 Dashboard Screen Top-Level Menu The DASHBOARD screen top-level menu is used to change output parameters and simultaneously view output measurements. The most commonly used output parameters are located in the DASHBOARD screen menu.
Page 232 Sequoia / Tahoe Series User Manual California Instruments When the unit is configured for 3-Phase output, each phase has individual settings. When the unit is configured for 1-Phase output, only Phase-A is displayed. Tapping on a phase button toggles the selection of that phase for inputting values.
Page 233 Sequoia / Tahoe Series User Manual California Instruments Figure 5-197. Apply button enabled when there is a configuration change Figure 5-198. Apply button Disabled when there is no change in R, L, or C RANGE Displays 166 VAC or 333 VAC range for AC-mode, and 220 VDC or 440 VDC range for DC mode operation.
Page 234 Sequoia / Tahoe Series User Manual California Instruments 5.10.4 Output Program Screen The OUTPUT PROGRAM screen provides the settings 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 235 Sequoia / Tahoe Series User Manual California Instruments Figure 5-200. RLC Settings 5.10.5 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 5-201. It can be reached in one of two ways: 1.
Page 236 Sequoia / Tahoe Series User Manual California Instruments Figure 5-202. 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 237 PONSetup:WGRoup <n>, through 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.
Page 238 Sequoia / Tahoe Series User Manual California Instruments Figure 5-206. 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 V(RMS) in AC and 220/440 VDC in DC mode. The output must be turned off to change this setting.
Page 239 Sequoia / Tahoe Series User Manual California Instruments Figure 5-208. ALC Settings PROFILES Selects the operational state of the power source; the default is Profile-0. Up to 15 unique profiles, including transient lists, could be stored; Subsequently, a profile could be loaded to automatically set the unit to that configuration.
Page 240 Sequoia / Tahoe Series User Manual California Instruments Figure 5-210. PROFILES Menu, NAME Sub-Menu USER CURRENT LIMITS Sets soft limits for the minimum and maximum output voltage to which the unit could be programmed using the front panel or remote digital interface; the default is full-scale. Figure 5-211.
Page 241 Sequoia / Tahoe Series User Manual California Instruments Figure 5-213. CONFIGURATION Menu, PONS Menu The PONS menu has the following fields: Entry Description PONS MODE PONS menu: Selects the mode of operation for the output voltage of the power source: either AC or DC; the default is AC. Figure 5-214.
Page 242 Sequoia / Tahoe Series User Manual California Instruments PONS RESISTANCE PONS menu: Sets the value of the output Resistance. Figure 5-216. PONS Resistance Settings PONS INDUCTANCE PONS menu: Sets the value of the output Inductance. Figure 5-217. PONS Inductance Settings PONS CAPACITANCE PONS menu: Sets the value of the output Capacitance.
Page 243 Sequoia / Tahoe Series User Manual California Instruments Figure 5-219. PONS Sync Settings 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 additional programmable...
Page 244 Sequoia / Tahoe Series User Manual California Instruments Figure 5-221.PONS ALC Settings 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 5-222. PONS Phase Number Settings 5.11 Measurements Screen The Sequoia\Tahoe Series power source uses a DSP-based data acquisition system to provide extensive information regarding the output parameters.
Page 245 Sequoia / Tahoe Series User Manual California Instruments Figure 5-223. MEASUREMENTS Screen Top-Level Menu 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 to be local or remote).
Page 246 Sequoia / Tahoe Series User Manual California Instruments POWER Displays the true power, kW, and apparent power, kVA, of the load. Figure 5-226. Power Measurements – Source, Grid Simulator, eLoad – RMS Current and eLoad RLC Programming Mode Figure 5-227. Power Measurements – eLoad – Power Programming Mode CURRENT When in AC-mode or (AC+DC)-mode, displays the RMS output...
Page 247 Sequoia / Tahoe Series User Manual California Instruments Figure 5-228. 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 248 Sequoia / Tahoe Series User Manual California Instruments Figure 5-231. Cress Factor Measurements WATT HOUR Displays the energy, kWh, consumed by the load, and the true power in kW. The Start and Stop function determines the interval during which energy is calculated. The Clear function resets the accumulated energy value.
Page 249 Sequoia / Tahoe Series User Manual California Instruments Figure 5-233. 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 250 Sequoia / Tahoe Series User Manual California Instruments Figure 5-235. 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 251 Sequoia / Tahoe Series User Manual California Instruments PHASE: Causes the acquisition to trigger on the occurrence of zero phase angle of the output voltage. When started, the acquisition holds until the zero phase angle occurs, before trig gering the acquisition. This mode allows the exact positioning of the acquisition data window with respect to the voltage waveform.
Page 252 Sequoia / Tahoe Series User Manual California Instruments Harmonics Bar View: This function displays the frequency spectrum of the output voltage or current waveform derived through FFT (fast Fourier transform) analysis. The frequency spectrum is displayed in graphical format, ranging from DC through the 49 harmonic, with up to 25 harmonic components shown per screen;...
Page 253 For detailed information on setting up the data communications digital interfaces using the SCPI commands or the 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.
Page 254 Sequoia / Tahoe Series User Manual California Instruments ANALOG Selects the reference that determines the output voltage waveform and amplitude; the default is INT. The options are as follows: INT: Selects programming of the output voltage waveform and amplitude by the internal controller reference. RPV: Selects programming of output voltage amplitude with an external analog interface signal, with the waveform being set by the internal controller reference.
Page 255 Sequoia / Tahoe Series User Manual California Instruments RS232 Configures the RS-232C communications interface; These settings must match those set for the communications port of the user's external controller. The setup parameters are as follows: Baud Rate: sets the baud rate to either 9600, 19,200, 38,400, 57600, or 115,200 baud.
Page 256 Sequoia / Tahoe Series User Manual California Instruments Configures the LAN (Ethernet) communications interface. After settings are changed, the unit must be turned off/on for them to take effect. Figure 5-244. CONTROL INTERFACE, LAN Menu The following sub-menus are available in the LAN menu: Entry Description LAN SETTINGS...
Page 257 Sequoia / Tahoe Series User Manual California Instruments Figure 5-246. CONTROL INTERFACE, LAN CONFIGURE Sub-Menu 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 258 Sequoia / Tahoe Series User Manual California Instruments Figure 5-249. LAN Config 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 259 Sequoia / Tahoe Series User Manual California Instruments Figure 5-252. MAC Address Host Name: Allows setting a unique alpha-numeric hostname. Figure 5-253. Host Name Restore Default: Performs an LXI reset to default settings. Figure 5-254. Restore Default REMOTE INHIBIT Configures the external Remote Inhibit signal, between /INHIBIT_ISO (Pin-12) and ISO_COM (Pin-9), for turning the output on/off.
Page 260 Sequoia / Tahoe Series User Manual California Instruments Figure 5-255. CONTROL INTERFACE REMOTE INHIBIT Menu 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; this state could only be cleared by the remote digital interface SCPI command, OUTPut:PROTection:CLEar;...
Page 261 Sequoia / Tahoe Series User Manual California Instruments 1. Tapping SYSTEM SETTINGS on the HOME Screen of the front panel touch-screen. 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 262 Sequoia / Tahoe Series User Manual California Instruments Figure 5-259: Model and Firmware Version Screen for Source Mode Figure 5-260: Model and Firmware Version Screen for Grid Simulator Figure 5-261: Model and Firmware Version Screen for eLoad – Current Programming Mode M447352-01 REV-A...
Page 263 Sequoia / Tahoe Series User Manual California Instruments Figure 5-262: Model and Firmware Version Screen for eLoad – Power Programming Mode Figure 5-263: Model and Firmware Version Screen for eLoad – RLC Programming Mode OPTIONS Displays options that have been installed in the power source. Figure 5-264: Options Screen 1 M447352-01 REV-A...
Page 264 Sequoia / Tahoe Series User Manual California Instruments Figure 5-265: Options Screen 2 LANGUAGE Selects the language of the display menus: English, German, French, Russian, Japanese, Chinese, or Korean. Figure 5-266: Language Screen HARDWARE LIMITS Displays the parameter limit values that are asserted at power-on. Figure 5-267: Hardware Limits Screen Provides settings for the calibration of the display touch-screen.
Page 265 Sequoia / Tahoe Series User Manual California Instruments Figure 5-268. 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. The touch-screen depends on pressure being applied to the top surface of the screen to detect the position of the input.
Page 266 Sequoia / Tahoe Series User Manual California Instruments Figure 5-270: Warning Fault Screen M447352-01 REV-A...
Page 267 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 268 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 could 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 269 Sequoia / Tahoe Series User Manual California Instruments where, F = harmonic frequency, harmonic = the full-scale rated voltage, full-scale = the full-scale fundamental frequency, maximum = the amplitude of the harmonic, harmonic-amplitude harmonic-number = the multiple of the full-scale fundamental frequency. The limits that are set assume a program of full-scale output voltage.
Page 270 California Instruments Standard Measurements The Sequoia Series power source is continuously sampling the instantaneous output voltage and current and storing the data in a buffer that holds 4096 voltage and current data points (frame). The data is used to calculate the values of the parametric measurements, with two cycles of measurement required to derive an RMS value.
Page 271 Measurement inaccuracies become more pronounced as the signal being measured is at the low end of the measurement range. This is particularly relevant for low current measurements. The Sequoia Series power source develops high levels of output power, and, accordingly, is optimized for providing and measuring high-load currents.
Page 272 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 273 Trigger modes are available from both the digital interface and the front panel. Refer to the Sequoia Series Programming Manual P/N M447353-01 or Tahoe Series Programming Manual P/N M445374-01 for details on this mode of operation.
Page 274 Sequoia / Tahoe Series User Manual California Instruments Figure 7-4. HARMONICS Menu, Triggering The following trigger sources are available in the HARMONICS menu: Entry Description Immediate This mode causes a trigger to occur as soon as the START field is tapped.
Page 275 Sequoia / Tahoe Series User Manual California Instruments Figure 7-5. Post-Trigger (Positive Delay) PRE-TRIGGER DELAY Negative trigger delay value may be specified up to the maximum time depth of the acquisition window. The value may be entered directly with the touch-screen keypad or using the rotary encoder. The following time interval range is available: Negative trigger delay, 42.6 ms to 426 ms.
Page 276 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 277 Step transients could only be programmed through the remote digital interface using the SCPI commands or the Sequoia Virtual Panels GUI; refer to the Sequoia Series Programming Manual M447353-01, Tahoe Series...
Page 278 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 279 Sequoia / Tahoe Series User Manual California Instruments Figure 8-4: Transients Screen Top-Level Menu Figure 8-5: Transients Settings Screen 2. 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 –...
Page 280 Sequoia / Tahoe Series User Manual California Instruments Figure 8-7: List Menu with Empty Buffer 4. 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...
Page 281 Sequoia / Tahoe Series User Manual California Instruments To V(olts): 0 V; the voltage value following the surge; Repeat: 0; number of times to repeat this transient event (not the entire transient list, as describe in Step 10, below); Function: Sine; output waveform Trig: blank (no selection);...
Page 282 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 283 Sequoia / Tahoe Series User Manual California Instruments 8.1.3 Switching Waveforms in Transient Lists The FUNCTION field available in each transient list event setup menu may be used to dynamically switch waveforms during transient execution. This allows different waveforms to be used during transient execution.
Page 284 The full capability of transients programming could be 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 285 Sequoia / Tahoe Series User Manual California Instruments  Create complex, multi-level sequences of output changes.  Create output changes that have rapid or precise timing requirements. The following power source functions are subject to transient control:  AC output current ...
Page 286 Step transients could only be programmed through the remote digital interface using the SCPI commands or the Sequoia Virtual Panels GUI; refer to the Sequoia Series Programming Manual, M447353-01, or refer to AMETEK PPD website, www.programmablepower.com, to download latest version.
Page 287 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 288 Sequoia / Tahoe Series User Manual California Instruments Figure 8-18: Transients Screen Top-Level Menu Figure 8-19: Transients Settings Screen 2. Tap on the TRIGGER sub-menu; refer to Figure 8-20. Set the parameter values as follows: Phase Sync: All Trig Out Source: BOT Start Source: Immediate Figure 8-20: Settings Screen –...
Page 289 Sequoia / Tahoe Series User Manual California Instruments Figure 8-21: List Menu with Empty Buffer 4. Tap the ADD field to enter the ADD sub-menu; refer to Figure 8-22. Figure 8-22: Current Transients Type Selection for eLoad – Current Programming Mode 5.
Page 290 Sequoia / Tahoe Series User Manual California Instruments Figure 8-23: Current Surge/Sag Settings 6. Tap the SAVE field in the CURRENT SURGE/SAG sub-menu. 7. Repeat Steps 4 through 7 two more times using 80 C / 83 ms and 40 C / 150 ms as values. 8.
Page 291 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 292 Sequoia / Tahoe Series User Manual California Instruments Figure 8-26: RUN Menu: Start and Abort Fields 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 could be saved in nonvolatile memory for later recall.
Page 293 The procedures are performed using SCPI commands through the remote digital interface using either the Sequoia/Tahoe Virtual Panels GUI program or a communications program such as HyperTerminal. For details pertaining to operation through the remote digital interface, refer to the Sequoia Series Programming Manual, M447353-01 Tahoe Series Programming Manual P/N M445374-01 for more details.
Page 294 Sequoia / Tahoe Series User Manual California Instruments CAUTION! The AC input power must be cycled off and then on when calibration has been completed to terminate the alignment routines and have calibration take effect. This is necessary also if only subsections of the calibration procedure are performed. 9.2.2 Output Voltage DC Zero Alignment, AC-Mode 1.
Page 295 Sequoia / Tahoe Series User Manual California Instruments 6. Perform the AC zero alignment using the SCPI command, CAL:VOLT:LRAN:ZERO <numeric value>. The numeric value is in the range of 0 to 255; the default value is 127. Align for the lowest AC output voltage reading of the selected phase, but at least <...
Page 296 Sequoia / Tahoe Series User Manual California Instruments 6. Send in the SCPI command, CAL:VOLT:FSC 15000. 7. Perform the alignment by adjusting the output AC voltage of the selected phase to 250 V(RMS), ±0.3 V as indicated on the external DVM by using the SCPI command, CAL:VOLT:FSC <numeric value>...
Page 297 Sequoia / Tahoe Series User Manual California Instruments 9.2.6 Output Voltage Measurement AC Gain Alignment, AC-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 298 Sequoia / Tahoe Series User Manual California Instruments 8. Send the SCPI command, INST:NSEL 2, and repeat Step-5 through Step-7 to align Phase-B. 9. Send the SCPI command, INST:NSEL 3, and repeat Step-5 through Step-7 to align Phase-C. 9.2.8 Output Voltage Measurement DC-Negative Gain Alignment, DC-Mode 1.
Page 299 Sequoia / Tahoe Series User Manual California Instruments FREQ 100 VOLT:ALC OFF OUTP 1 7. Set the output current of the power supply to the low range and 90% of the rated current, appropriate for the model that is to be aligned, using the SCPI command, CURR < 90% of the rated current>.
Page 300 Sequoia / Tahoe Series User Manual California Instruments 7. Set the output current of the power source to the high-range and 90% of the rated current, appropriate for the model that is to be aligned, using the SCPI command, CURR < 90% of the rated current>.
Page 301 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. 9.2.12 Output Current Measurement AC High-Range Offset Alignment, AC-Mode 1.
Page 302 Sequoia / Tahoe Series User Manual California Instruments MODE DC VOLT:RANGE 250 VOLT 110 VOLT:ALC OFF OUTP 1 7. Set the output current of the power source to the low range and 90% of the rated current, appropriate for the model that is to be aligned, using the SCPI command, CURR < 90% of the rated current>.
Page 303 Sequoia / Tahoe Series User Manual California Instruments 9. Send the SCPI query command, *OPC?, to determine when this alignment section has been completed. Ensure alignment has been completed (query returns a 1) before continuing. 10. Send the SCPI command, INST:NSEL 2, and repeat Step-6 through Step-9 to align Phase-B. 11.
Page 304 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 305 Sequoia / Tahoe Series User Manual California Instruments 5. Reset low-range offset alignment with the SCPI command, CAL:MEAS:CURR:DC:LROF 0. 6. Measure the output current with the SCPI command, MEAS:CURR:DC?. 7. Perform the alignment with the SCPI command, CAL:MEAS:CURR:DC:LROF <numeric value>. The numeric value is the output current returned by the command MEAS:CURR:DC?.
Page 306 Sequoia / Tahoe Series User Manual California Instruments generator output. Using a differential voltage probe for isolation, connect the other input of the phase meter to the power source output of Phase-A. 3. Enter the calibration password with the SCPI command, CAL:PASS “5000”. 4.
Page 307 Sequoia / Tahoe Series User Manual California Instruments OUTP 0 VOLT:RANGE 166 VOLT 100 FREQ 16 OUTP 1 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.
Page 308 Sequoia / Tahoe Series User Manual California Instruments 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 0.2 degree to obtain a phase meter reading of a value near zero.
Page 309 Sequoia / Tahoe Series User Manual California Instruments 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. Ensure alignment has been completed (query returns a 1) before continuing.
Page 310 Sequoia / Tahoe Series User Manual California Instruments VOLT:RANG 440 VOLT:ALC OFF VOLT:REF RPV INST:COUP NONE 4. Enter the calibration password with the SCPI command, CAL:PASS “5000”. 5. DC Offset alignment, high-range DC output (440 VDC): 6. Send the SCPI command, INST:NSEL 1, to select Phase-A. 7.
Page 311 Sequoia / Tahoe Series User Manual California Instruments 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. 2. Connect a DC reference voltage to external Analog Control signal connector Pin-1, Pin-2 and Pin-3 (signal) and Pin-4 (signal return (refer to Section 3.8.4).
Page 312 Sequoia / Tahoe Series User Manual California Instruments 20. Send the SCPI command, INST:NSEL 2, and repeat Step-19 and Step-20 to align Phase-B. 21. Send the SCPI command, INST:NSEL 3, and repeat Step-19 and Step-20 to align Phase-C. 9.2.25 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 313 Sequoia / Tahoe Series User Manual California Instruments OUTP 0 VOLT:ALC ON MODE AC VOLT:RANG 440 VOLT 440 FREQ 60 OUTP 1 15. Perform the adjustment using the command CAL:MON:VOLT:FSC <numeric value>. The numeric value is in the range of 0 to 255. Adjust until the phase A voltage monitor output reading is 7.07V(RMS) +/-10mV, where the output voltage is 440V.
Page 314 Sequoia / Tahoe Series User Manual California Instruments 10. Send the following SCPI commands to the power source (333 VAC range selected; ALC ON): OUTP 0 VOLT:ALC ON MODE AC VOLT:RANG 333 VOLT 333 FREQ 60 OUTP 1 11. Perform the adjustment using the command CAL:MON:VOLT:FSC <numeric value>. The numeric value is in the range of 0 to 255.
Page 315 Sequoia / Tahoe Series User Manual California Instruments 9.2.28 Alignment of Output Current Monitor, AC output The Isolated Output Current Monitor for getting the scaled-down output current is available in the rear panel external analog control signal connector: Phase-A current monitor signal output will be obtained at Pin-6;...
Page 316 Sequoia / Tahoe Series User Manual California Instruments incurred, compared to the specifications of the parameters that are to be calibrated. To set up the alignment procedures, perform the following initial steps: 1. Disconnect AC mains power when making setup connections. 2.
Page 317 Sequoia / Tahoe Series User Manual California Instruments CAUTION! The AC input power must be cycled off and then on when calibration has been completed to terminate the alignment routines and have calibration take effect. This is necessary also if only subsections of the calibration procedure are performed. 9.3.2 Procedure For Three-Phase AC Synchronization.
Page 318 Sequoia / Tahoe Series User Manual California Instruments SYNC:STAT? This should give a response as SYNCED. 9.3.3 Procedure For DC Synchronization. 1. Change the operating mode of Source to DC. Set the voltage and Current limit for the Source. Ensure the programmed current limit of the Source must be higher than the set current of the Sequoia unit.
Page 319 Sequoia / Tahoe Series User Manual California Instruments 7. Perform the synchronization procedure section 9.3.2 and enable the output of Sequoia unit using command OUTP 1. 8. Perform the AC function DC zero alignment using the SCPI command, CAL:CURR:AC:LRAN:OFF <numeric value>. The numeric value is in the range of +/- 3000. Align for the lowest AC output voltage reading of the selected phase, but at least <...
Page 320 Sequoia / Tahoe Series User Manual California Instruments VOLT:ALC OFF MODE DC VOLT:RANGE 22s0 SYNC:VOLT 200 CURR 0 6. Perform the synchronization procedure section 9.3.3 and enable the output of Sequoia unit using command OUTP 1. 7. Perform the alignment with the SCPI command, CAL:VOLT:DC:ZERO <numeric value>. Start with a value of zero and increase or decrease for the lowest DC output current reading of the selected phase within the range of 0 ...
Page 321 Sequoia / Tahoe Series User Manual California Instruments 12. Set Voltage Source (connected at Sequoia unit load side) Mode DC, voltage to 200V, and current limit Max (should be greater than the Sequoia unit 80% of the DC Low range rated current).
Page 322 Sequoia / Tahoe Series User Manual California Instruments 9. Send the SCPI command, INST:NSEL 3, and repeat Step-7 to align Phase-C. 10. Repeat Step-7 for sync frequencies in the unit of 100 Hz, 200 Hz, 550 Hz, 819 Hz, and 905 Hz (with SCPI command, SYNC:FREQ <n>), or the highest frequency of the particular power source model being aligned.
Page 323 Sequoia / Tahoe Series User Manual California Instruments 13. Send the SCPI command, INST:NSEL 1, to select Phase-A. 14. Apply an external DC voltage of 10.0 VDC, ± 0.005 V. 15. Measure the output current of Phase A with an external meter (Power Analyzer), and verify the measured output current is 100% of full-scale current ±2% FSC.
Page 324 Sequoia / Tahoe Series User Manual California Instruments CURR:REF RPV INST:COUP NONE 5. Perform the synchronization procedure section 9.3.2 and enable the output of Sequoia unit using command OUTP 1. 6. Enter the calibration password with the SCPI command, CAL:PASS “5000”. 7.
Page 325 The table below displays a list of possible error and status messages along with their possible cause and remedy. Refer to the Sequoia Series Programming Manual, M447353-01 and Tahoe Series Programming Manual P/N M445374-01 for more details.
Page 326 Sequoia / Tahoe Series User Manual California Instruments Number Message String Cause Remedy -128 “Numeric data not allowed” The number received, but Check the Programming Manual for not allowed correct command syntax. -168 “Block data not allowed” Block data received but not Check the Programming Manual for allowed correct command syntax.
Page 327 Save the setup again in the same contents lost registers to restore content. -315 “Configuration memory lost” Hardware configuration Contact AMETEK Service Department settings lost to obtain instructions on restoring configuration data. -330 “Self-test failed” Internal error Contact AMETEK Service Department to troubleshoot the problem.
Page 328 Sequoia / Tahoe Series User Manual California Instruments Number Message String Cause Remedy “Limit memory lost” Hardware configuration Contact AMETEK Service Department settings lost to obtain instructions on restoring configuration data. “System memory lost” Memory corrupted Recycle power. Contact AMETEK Service Department for instructions if memory remains corrupted.
Page 329 AC Module is not able to Verify that external ambient produce output power temperature is not greater than 40°C. Contact AMETEK Service Department for instructions pertaining to an internal hardware fault. “External reference exceeds The amplitude or frequency Ensure that the external programming limit”...
Page 330 Sequoia / Tahoe Series User Manual California Instruments 11. Service 11.1 Cleaning Because the power supply uses forced convection cooling, the airflow through the unit can pull in dust. In environments having high concentrations of dust, periodic cleaning may be required. Disconnect AC mains power to the power supply before cleaning.
Page 331 Sequoia / Tahoe Series User Manual California Instruments Cause Solution Mode or Voltage Range could only be performed with the output off. 11.2.5 Parallel Group Faults When Leader Output Switch is Turned On Cause Solution Clock Config set to Auxiliary with Clock Mode With Clock Config set to Auxiliary, Clock Mode must be either set to SYNC.
Page 332 Sequoia / Tahoe Series User Manual California Instruments Cause Solution The crest factor of the load exceeds 5:1. Reduce load current peaks by reducing load or adding power sources in the parallel group. 11.3.5 Unit Shuts Down after Short Interval Cause Solution The load has a high inrush current and...

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