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California Instruments 251TL User And Programming Manual

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Revision C
November 2001
Copyright © 2001
By California Instruments.
All rights reserved.
P/N 7351-960
Model 251TL / 351TL
AC Power Source
User and Programming Manual
TEL: +1 (858) 677-9040
FAX: +1 (858) 677-0940
Email:
sales@calinst.com
Web Site:
http://www.calinst.com

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Summary of Contents for California Instruments 251TL

  • Page 1 Revision C November 2001 Copyright © 2001 By California Instruments. All rights reserved. P/N 7351-960 Model 251TL / 351TL AC Power Source User and Programming Manual TEL: +1 (858) 677-9040 FAX: +1 (858) 677-0940 Email: sales@calinst.com Web Site: http://www.calinst.com...
  • Page 2 User and Programming Manual - Rev C User and Programming Manual AC Power Source California Instruments Models: 251TL, 351TL • Options: -L22, -OP1, -SKT, -RMS, -EXT • © Copyright 2001 California Instruments, Rev C, November 2001 TL Series November 2001...

  • Page 3: Safety Summary

    These guidelines are not a substitute for vigilance and common sense. If this power source is not used as specified in this manual, the protection provided by this equipment may be impaired. California Instruments assumes no liability for the customer's failure to comply with these requirements.
  • Page 4 User and Programming Manual - Rev C Electrical Safety Symbols Used in This Manual TL Series November 2001...

  • Page 5: Warranty Information

    Excepted from this warranty are fuses and batteries that carry the warranty of their original manufacturer where applicable. CALIFORNIA INSTRUMENTS will service, replace, or adjust any defective part or parts, free of charge, when the instrument is returned freight prepaid, and when examination reveals that the fault has not occurred because of misuse, abnormal conditions of operation, user modification, or attempted user repair.

  • Page 6: Table Of Contents

    User and Programming Manual - Rev C Table of Contents Introduction .............................1 General Description ..........................1 Accessory Equipment/Rack Slides ......................1 Specifications..........................3 Electrical ..............................3 Measurements [Option] .........................6 System Specification ..........................7 Unit Protection ............................8 Mechanical.............................8 Environmental............................9 Regulatory .............................9 Front Panel Controls..........................10 Available Options..........................10 Installation and Functional Test ....................11 Unpacking............................11 Power Requirements ...........................11...
  • Page 7 User and Programming Manual - Rev C Remote Control ..........................59 Introduction ............................59 PGUI32 Program Requirements ......................59 IEEE Interface ............................. 61 RS232C Interface..........................62 PGUI32 Setup and Installation ......................64 Trouble Shooting - RS232C ........................ 66 Trouble Shooting - IEEE-488 / GPIB....................69 PGUI32 Distribution Files ........................
  • Page 8 List of Figures Figure 2-1: Output Power Rating as a Function of Voltage and Load PF..........5 Figure 3-1: Model 251TL / 351TL AC Power Source................11 Figure 3-2: Rear Panel View .......................12 Figure 3-3: Connections to T1 for 105 - 125V Line Input..............14 Figure 3-4: Connections to T1 for 210 - 250V Line Input..............16...
  • Page 9 User and Programming Manual - Rev C List of Tables Table 4-1: Factory Default Power on Settings ..................31 Table 6-1: Load Resistors and Current....................43 Table 6-2: CAL Mode Status LED Indicators..................44 Table 7-1: Basic Symptoms........................53 Table 7-2: Poor Output Voltage Accuracy ..................53 Table 7-3: Poor Output Voltage Regulation ..................53 Table 7-4: Distorted Output ........................54 Table 7-5: Unit Shuts Down After 3-5 Seconds ..................54...

  • Page 10: Introduction

    351TL and 251TL AC power source. 1.1 General Description The 351TL AC source is a 350 VA programmable AC power source. The 251TL is a 250 VA version of the power source. In addition to the standard models, several options are available that may change the voltage and frequency ranges of the power source.
  • Page 11 User and Programming Manual - Rev C This page intentionally left blank November 2001 TL Series...

  • Page 12: Specifications

    User and Programming Manual - Rev C Specifications All specifications at 23 ±5°C unless noted otherwise. 2.1 Electrical Input 115 V nominal, 105 V to 125 V Line Voltage: 230 V nominal, 210 V to 250 V 100 V nominal, 91 V to 109 V 200 V nominal, 182 V...
  • Page 13 ± 0.015 % of full scale under constant load, line and temperature Total Power 351TL: 350 VA from 90 to 100% of V range PT = 0.7 251TL: 250 VA from 78 to 100% of V range Current (Refer to Figure 2-1 for derating) Output Amps rms Amps peak...

  • Page 14: Figure 2-1: Output Power Rating As A Function Of Voltage And Load Pf

    User and Programming Manual - Rev C Parameter Specification Frequency Range 351TL 16.0 - 8000 Hz Maximum output voltage available from 45 Hz. Resolution 0.01 Hz from 16.00 to 80.00 Hz 0.1 Hz from 80.1 Hz to 800.0 Hz 1 Hz from 801 Hz to 8000 Hz ±...

  • Page 15: Measurements [Option]

    User and Programming Manual - Rev C 2.2 Measurements [Option] Parameter Specification Unit True RMS Current Available on standard unit. Range 0.000 - 4.000 Accuracy 0.2 % FS + 0.3 % reading Resolution 0.001 % FS / °C Temp 0.016 Coefficients Peak Current Requires Option -OP1 Range...

  • Page 16: System Specification

    User and Programming Manual - Rev C 2.3 System Specification Parameter Specification Setup storage Eight non volatile front panel setup registers available through interface. Power on setting register available from front panel. Interface (Option package -OP1 required) RS-232C Bi-directional serial interface Rear panel connector: 9 pin D shell Handshake:...

  • Page 17: Unit Protection

    User and Programming Manual - Rev C 2.4 Unit Protection Parameter Specification Input Overcurrent: Electronic current limit with circuit breaker. Transients: Surge protection to withstand EN50082-1 (IEC 801-4, 5) levels. Output Overcurrent: Constant current operation. (Standard) 0.1 Second shutdown (constant voltage mode Option) Output Short Circuit: Peak current limit.

  • Page 18: Environmental

    User and Programming Manual - Rev C 2.6 Environmental Parameter Specification Operating Temp: 0 degrees to + 40 degrees Celsius. Storage Temp: - 40 degrees to + 85 degrees Celsius. ≤ 90% RH up to 40° C., non condensing Humidity: Operating: ≤...

  • Page 19: Front Panel Controls

    User and Programming Manual - Rev C 2.8 Front Panel Controls Parameter Specification Controls: Shuttle knobs: Allows continuous change of Voltage, Frequency and Current limit. Voltage change is inactive on single voltage range configuration units. Function keys: Controls Output state, Voltage range and Display mode. Displays: Two, 4 digits, 0.5”...

  • Page 20: Installation And Functional Test

    The nominal operating voltage is 100V, 115V, 200V or 230V line input. The Power Source line input setting is shown on the type sticker located on the rear panel. Figure 3-1: Model 251TL / 351TL AC Power Source WARNING: Do not connect the unit to a 400-480 service, as the result will be a severely damaged unit.

  • Page 21: Ac Line Voltage

    User and Programming Manual - Rev C 3.2.1 AC Line Voltage The AC Power Source has been designed to operate from either of the following AC line voltage ranges: 1) 91 to 109 V 2) 82 to 217 V 3) 105 to 125 V 4) 210 to 250 V CAUTION: The AC Power Source will be damaged if it is operated at an input voltage...

  • Page 22: Input Voltage Range Selection

    User and Programming Manual - Rev C 3.3 Input Voltage Range Selection WARNING: The line voltage is present in certain sections of this Power Source. DEATH: On contact may result if personnel fail to observe safety precautions. Do not touch electric circuits when power is applied. Servicing should only be performed by trained personnel.

  • Page 23: Figure 3-3: Connections To T1 For 105 - 125V Line Input

    User and Programming Manual - Rev C Figure 3-3: Connections to T1 for 105 - 125V Line Input November 2001 TL Series...
  • Page 24 User and Programming Manual - Rev C 3.3.2 High Input Voltage Range Configuration (210 – 250 V) In order to change the voltage range configuration: Turn off the input circuit breaker. Disconnect AC input power at TB1. Remove the AC Power Source top cover by removing (14) #6-32 x 5/16” FLH screws.

  • Page 25: Figure 3-4: Connections To T1 For 210 - 250V Line Input

    User and Programming Manual - Rev C Figure 3-4: Connections to T1 for 210 - 250V Line Input November 2001 TL Series...

  • Page 26: Mechanical Installation

    User and Programming Manual - Rev C 3.4 Mechanical Installation The power source has been designed for rack mounting in a standard 19 inch rack. The unit must be supported from the sides with optional rack slides. See Accessory Equipment/Rack Slides in Section 1.2.

  • Page 27: Output Voltage Ranges

    User and Programming Manual - Rev C 3.7 Output Voltage Ranges The standard 351TL AC power source has two output voltage ranges 0-135 V 0-270 V . The operator may switch from one range to the other at will with no special precautions except to remember that the output voltage will go to zero voltage whenever a range change takes place.

  • Page 28: Functional Test

    0.5 % at 60 Hz. 7. Using the right shuttle set the output current limit value to 2 amps (1 amp for the 251TL). If the unit is configured for Constant Current mode, the system should go into current limit and reduce the output voltage.

  • Page 29: Figure 3-5: Test Setup 351Tl

    User and Programming Manual - Rev C Figure 3-5: Test Setup 351TL November 2001 TL Series...

  • Page 30: Current Limit - Modes Of Operation

    User and Programming Manual - Rev C 3.9 Current Limit - Modes of Operation When the Power Source is shipped from the factory, it is configured for the Constant Current Mode of operation. This mode means if the load current exceeds the programmed Current Limit value, the output current will continue at the programmed value.
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  • Page 32: Front Panel Operation

    User and Programming Manual - Rev C Front Panel Operation 4.1 Functional Controls The front panel can be divided in a small number of functional areas: • Output Sockets • Status Indicator lights • Shuttle knobs • LCD display • Button controls Figure 4-1: Front Panel View 4.1.1 Dual Outlet Socket (Option -SKT)

  • Page 33: Status Indicator Lights

    User and Programming Manual - Rev C 4.1.2 Status Indicator Lights Ten LED status indicators are located directly above the LCD display. These LED’s correspond to the following conditions: REMOTE The REMOTE LED indicates that the unit is in remote control mode.

  • Page 34: Figure 4-2: Voltage Auto Range Switch Over Points

    User and Programming Manual - Rev C Illuminates when the LCD displays shows the measured power factor. It also illuminates in the calibration mode of operation. In calibration mode, the PF LED is always lit in combination with the measurement or output junction being calibrated.

  • Page 35: Figure 4-3: Shuttle Knob

    User and Programming Manual - Rev C 4.1.3 Shuttle knobs Counter Clockwise clockwise DECREASE INCREASE Figure 4-3: Shuttle Knob There are two shuttle knobs located below the LCD display which are used to change setup parameters for voltage, frequency and current limit. The SELECT button selects the function of the right shuttle.

  • Page 36: Lcd Displays

    User and Programming Manual - Rev C SELECT The SELECT button selects the function of the right Shuttle knob and the LCD display. The Shuttle will control the output frequency and the display will show the program frequency value when the mode selection is frequency. The Shuttle knob will program the current limit and the display will show its value in the current mode.

  • Page 37: How To Examples

    User and Programming Manual - Rev C 4.2 How to Examples... This section covers some common tasks that are often performed with an AC power source. These examples are written in a How to... format and provide step by step instructions on how to set up the AC Source for a specific task.
  • Page 38 User and Programming Manual - Rev C 4.2.3 Display Measurement Data Measurements can be called up as follows: 1. For voltage, the left display always displays the measured output voltage unless the knob is turned. As the knob is turned, the programmed voltage will be displayed instead.
  • Page 39 User and Programming Manual - Rev C 4.2.5 Control the Output The Output can be disabled or enabled using the ON/OFF button as follows: 1. Pressing the OUTPUT button when the output LED is on will open the AC source output relay.

  • Page 40: Setting The Power On Initialization Values

    User and Programming Manual - Rev C 4.3 Setting the Power on Initialization Values The Power Source is supplied with default factory settings when the unit is powered up. The factory settings are: Parameter Factory default setting Voltage range Auto Voltage Range Voltage 5.0 Volt Frequency...

  • Page 41: Current Limit Modes

    User and Programming Manual - Rev C 4.4 Current Limit Modes The Power Source supports two modes of current limiting. In either mode, the end user can set the RMS current level at which the current limit function will kick in. The available current limit modes are: Constant Current (CC) mode This is the default mode as supplied from the...

  • Page 42: Function Strobe [Option]

    In this case, the end user has to provide an external DC power supply and pull-up. A 9 Volt DC battery may be used for this purpose. Contact California Instruments’ service department for details on changing the operation of the FS output.
  • Page 43 User and Programming Manual - Rev C This page intentionally left blank November 2001 TL Series...

  • Page 44: Principle Of Operation

    User and Programming Manual - Rev C Principle of Operation 5.1 General An explanation of the circuits in the AC Source is given in this section. Refer to block diagram in Figure 5-1. 5.2 Overall Description Input power at the rear panel is routed through the circuit breaker to the input transformer. The DC supply outputs then go to the Amplifier, A1, then are directed to other modules.
  • Page 45 User and Programming Manual - Rev C This page intentionally left blank November 2001 TL Series...

  • Page 46: Figure 5-1: Ac Power System Block Diagram

    User and Programming Manual - Rev C Figure 5-1: AC Power System Block Diagram TL Series November 2001...
  • Page 47 User and Programming Manual - Rev C This page intentionally left blank November 2001 TL Series...

  • Page 48: Range Relay Board

    User and Programming Manual - Rev C 5.4 Range Relay Board The Range Relay Board, Module Assembly A3, has all of the AC Power Source relays. These relays are operated from +28 VDC. The output relay is controlled by the CNF Logic Line.

  • Page 49: Ieee 488/ Rs232 Interface [Option]

    User and Programming Manual - Rev C 5.7 IEEE 488/ RS232 Interface [Option] The 351TL can optionally be outfitted with a combined RS232C and IEEE 488 interface board. This board assembly has opto-couplers for interface isolation. The GPIB address for the AC source is selected by a DIP switch on the rear panel. Only one interface can be active at any given time and must be selected using DIP switch position 6.
  • Page 50 User and Programming Manual - Rev C CAUTION THE INPUT LINE VOLTAGE IS PRESENT IN CERTAIN SECTIONS OF THIS POWER SOURCE. THIS EQUIPMENT GENERATES POTENTIALLY LETHAL VOLTAGES. DEATH ON CONTACT MAY RESULT IF PERSONNEL FAIL TO OBSERVE SAFETY PRECAUTIONS. DO NOT TOUCH ELECTRONIC CIRCUITS WHEN POWER IS APPLIED.
  • Page 51 User and Programming Manual - Rev C This page intentionally left blank November 2001 TL Series...

  • Page 52: Calibration

    Range Current Load max. 48.2 Ω 351TL 135 V 2.8 A 192.9 Ω 270 V 1.4 A 56.3 Ω 251TL 135 V 2.4 A 112.5 Ω 270 V 1.2 A Table 6-1: Load Resistors and Current TL Series November 2001...

  • Page 53: Selecting Calibration Mode

    User and Programming Manual - Rev C 6.2 Selecting Calibration Mode The Power Source can be placed in calibration mode (CAL mode) by depressing the recessed CAL button located on the front panel using a pen or similar pointed object. Depressing this button for a brief moment will place the Power Source in CAL mode, indicated by the illumination of the PF LED.

  • Page 54: Routine Calibration

    User and Programming Manual - Rev C 6.3 Routine Calibration Setup: Connect the test equipment to the power source as shown in Figure 6-1. The DMM can be connected to the common output terminal at the rear of the unit. Never connect the load wire to the SENSE terminal at the Rear Panel terminal strip.

  • Page 55: Figure 6-2: Test Equipment Hook-Up For Current And Power Measurement Calibration

    User and Programming Manual - Rev C 6.3.2 Measurement Calibration - Low Scale Note: Measurement calibration can be done at any output frequency setting as only one set of calibration coefficients is used for measurement calibration. However, for best results, calibrate the measurements at the frequency which is used in most applications, e.g.
  • Page 56 User and Programming Manual - Rev C 3. The output voltage must be programmed to 10.0 volts. 4. Use the SELECT key to select the Current Measurement calibration mode. This mode is indicated by the I RMS LED. 5. Use the left control knob to adjust the current reading shown on the right hand LCD until it reads as close as possible to 0.0.
  • Page 57 POWER SOURCE MAX CURRENT 351TL 2.8 A 251TL 2.4 A 4. Use the SELECT key to select the Current Measurement calibration mode. This mode is indicated by the I RMS LED. 5. Use the left control knob to adjust the current reading shown on the right hand LCD until it reads as close as possible to the reference reading indicated by the DMM measuring the current shunt voltage (DMM 1).

  • Page 58: Non-Routine Calibration

    User and Programming Manual - Rev C 4. Use the left control knob to adjust the peak current reading shown on the right hand LCD until it reads as close as possible to the reference reading derived from the external DMM (DMM 1).

  • Page 59: Current Limit Adjustment

    User and Programming Manual - Rev C 6.4.1 Current Transformer Adjustment Note: The Current Transformer must be adjusted before the Current Limit and Current Measurement Adjustments. 1. Connect the test equipment as shown in Figure 6-2. Use the 43.4 ohm load. 2.

  • Page 60: Figure 6-3: Internal Adjustments

    User and Programming Manual - Rev C Figure 6-3: Internal Adjustments TL Series November 2001...
  • Page 61 User and Programming Manual - Rev C 6.4.3 Open Sense Adjustment Connect the test equipment as shown in Figure 6-1. NOTE: The 351TL must be configured for the Constant Current Mode of operation for this procedure. For this mode jumpers W1 and W2 on the controller must be removed.

  • Page 62: Service

    User and Programming Manual - Rev C Service 7.1 General This section describes suggested maintenance and troubleshooting procedures. The troubleshooting procedure is divided into two sections. The first section deals with basic operation and connection of the equipment. The second section requires opening the unit and using the LED indicators and a simple multimeter to troubleshoot the unit down to the module level.

  • Page 63: Table 7-4: Distorted Output

    User and Programming Manual - Rev C 7.2.3 Distorted Output Table 7-4: Distorted Output CAUSE SOLUTION Power source is grossly overloaded. Reduce load. The crest factor of the load exceeds 3:1. Reduce load current peaks by reducing load. 7.2.4 Unit Shuts Down After 3-5 Seconds Table 7-5: Unit Shuts Down After 3-5 Seconds CAUSE SOLUTION...

  • Page 64: Module Removal

    User and Programming Manual - Rev C 7.2.7 Fault Lamp On If the power source Fault lamp is on, the following may be at fault: CAUSE SOLUTION Ambient temperature is too high. Operate power source between 0 and 50°C. Fan or ventilation holes are blocked. Remove obstructions.

  • Page 65: Figure 7-1: Assembly Location

    User and Programming Manual - Rev C Figure 7-1: Assembly Location November 2001 TL Series...
  • Page 66 User and Programming Manual - Rev C 7.3.1 Oscillator Module Removal/Replacement If a fault is found that requires the replacement of the Oscillator Module (Assembly A1) follow the following steps and refer to Figure 7-1 for the module locations: 1. Turn off the front panel circuit breaker. Remove the input power from the rear panel terminal block.

  • Page 67: Replaceable Parts

    In order to ensure prompt, accurate service, please provide the following information, when applicable for each replacement part ordered. a. Model number and serial number of the instrument. b. California Instruments’ part number for the sub-assembly where the component is located. (California Instruments PART #) c. Component reference designator. (SEQ #) d.

  • Page 68: Remote Control

    This interface is part of the -OP1 option package. This interface option also includes the California Instruments Graphical User Interface program - PGUI32. This Windows™ program provides a soft front panel to the instrument when connected to a PC through the RS232C or IEEE-488 interface.

  • Page 69: Figure 8-1: Rear Panel View

    User and Programming Manual - Rev C Figure 8-1: Rear Panel View November 2001 TL Series...

  • Page 70: Ieee Interface

    User and Programming Manual - Rev C Note: The PGUI32 can be run in the absence of a power source. If no AC source is available, the PGUI32 can be operated in a simulation mode. The program will detect these conditions and start up in simulation mode after notifying the operator.

  • Page 71: Rs232C Interface

    TL Series AC source over the RS232C serial interface. The interface is optional and must be installed for this to work. 'California Instruments 251/351TL RS232C Communication Demo Program '(c) 1998 Copyright California Instruments, All Rights Reserved 'This program is for demonstration purposes only and is not to be 'used for any commercial application...
  • Page 72 User and Programming Manual - Rev C END IF IF esr% AND 8 THEN PRINT "*** Instrument Dependent Error Reported by AC Source ***" END IF IF esr% AND 16 THEN PRINT "*** Command Execution Error Reported by AC Source ***" END IF IF esr% AND 32 THEN PRINT "*** Command Syntax Error Reported by AC Source ***"...

  • Page 73: Serial Cable Diagram

    User and Programming Manual - Rev C 8.4.2 Serial Cable Diagram California Instruments AC power sources require a special RS232C cable to communicate with a PC. Standard null-modem cables obtained from a computer hardware store most likely will not work. For this reason, all California Instruments power sources that operate over RS232C are supplied with a RS232C 9 pin female to 9 pin female cable.

  • Page 74: Installing The Pgui32 Software

    At the “Open” prompt, type D:Setup depending on which disk drive you used and click on the OK button. Select the 251TL/351TL entry under low Power AC Sources from the list of model numbers. Select the GUI Software tab and click on the "Execute Selection" button.

  • Page 75: Trouble Shooting - Rs232C

    User and Programming Manual - Rev C 8.6 Trouble Shooting - RS232C This section provides guidelines for resolving communication problems that may occur when using the PGUI32 software under Windows™. You may encounter problems when using the serial interface with the PGUI32 program that is supplied with the interface option for this source.

  • Page 76: Figure 8-4: System Properties Dialog Box

    User and Programming Manual - Rev C Procedure 1. Make sure the PGUI32 program is closed and no device is using the com port in use. 2. From the Windows™ desktop, right click on the “My Computer” icon which is located in the top left corner of the screen.
  • Page 77 User and Programming Manual - Rev C Resolution for Symptom 2 Execute the suggested procedure to resolve symptom 1 first. If an occasional error continues to occur while slewing the voltage or frequency slider controls in the PGUI32 program, add a command delay to the PGUI32 Registry Interface section using the following procedure.

  • Page 78: Trouble Shooting - Ieee-488 / Gpib

    User and Programming Manual - Rev C 8.7 Trouble Shooting - IEEE-488 / GPIB This section provides guidelines for resolving communication problems that may occur when using the Power Source with or without the PGUI32 software with a IEEE-488 / GPIB interface. Symptoms: 1.

  • Page 79: Pgui32 Distribution Files

    Application directory files The following files are copied to the application directory. The application directory name is chosen by the user during the installation process. The default directory for the PGUI32 is: C:\Program Files\California Instruments\PGUI32 Pgui32.exe Executable Pgui32.hlp On Line Help file Pgui32.cnt...

  • Page 80: Software Registration

    PGUI32. Consult the included readme file for last minute program information. 8.9 Software Registration Updates of this and other California Instruments programs are posted on a regular basis on the California Instruments web site. You can find available programs by selecting the Software, GUI's and Drivers menu.
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  • Page 82: Introduction To Scpi

    User and Programming Manual - Rev C Introduction to SCPI SCPI (Standard Commands for Programmable Instruments) is a programming language for controlling instrument functions over the RS232 or IEEE 488 bus. The same SCPI commands and parameters control the same functions in different classes of instruments. For example, you would use the same MEAS:VOLT? command to measure the AC source output voltage or the output voltage of a SCPI-compatible Multimeter.

  • Page 83: Figure 9-1: Partial Command Tree

    User and Programming Manual - Rev C The SCPI Command Tree As previously explained, the basic SCPI communication method involves sending one or more properly formatted commands from the SCPI command tree to the instrument as program messages. The following figure shows a portion of a subsystem command tree, from which you access the commands located along the various paths (you can see the complete tree in appendix A).
  • Page 84 User and Programming Manual - Rev C 2. SOUR:VOLT:LEV 115. The entire message would be: SOUR:VOLT:RANG 150;LEV 115. The message terminator after LEVel 115 returns the path to the root. Note: The TL Series interface buffer is limited to 21 characters, however. As such, compound commands are not recommended as they often exceed this message length limit.

  • Page 85: Using Queries

    User and Programming Manual - Rev C 9.3 Using Queries Observe the following precautions with queries: • Set up the proper number of variables for the returned data. • Read back all the results of a query before sending another command to the AC source. Otherwise a Query Error will occur and the non-returned data will be lost.
  • Page 86 User and Programming Manual - Rev C Message Component Example Headers SOURC VOLT FREQ CURR Header Separator The colon in SOUR:VOLT Data Data Separator The space in VOLT 80 and FREQ 60 Message Units VOLT 80 FREQ 60 CURR? Message Unit Separator The semicolons in VOLT 80;...
  • Page 87 User and Programming Manual - Rev C Query Indicator Following a header with a question mark turns it into a query (VOLTage?, VRANGe?). Message Unit Separator When two or more message units are combined into a compound message, separate the units with a semicolon (VOLT 100;FREQ 60).

  • Page 88: Scpi Data Formats

    User and Programming Manual - Rev C 9.5 SCPI Data Formats All data programmed to or returned from the AC source is in ASCII. The data type may be numerical or character string. Numerical Data Formats Symbol Data Form Talking Formats <NR1>...
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  • Page 90: Scpi Command Reference

    User and Programming Manual - Rev C 10 SCPI Command Reference Where appropriate, related commands or queries are included. These are listed because they are either directly related by function, or because reading about them will clarify or enhance your understanding of the original command or query. This chapter is organized as follows: •...

  • Page 91: Calibration Subsystem

    User and Programming Manual - Rev C 10.2 Calibration Subsystem The commands in this subsystem allow you to do the following: • Enable and disable the calibration mode • Calibrate all measurement circuits and store new calibration coefficients in nonvolatile memory.

  • Page 92: Measurement Calibration

    User and Programming Manual - Rev C 10.2.2 Measurement Calibration All measurement calibrations are performed by adjusting the measurement reading up or down using a calibration coefficient. The coefficient value ranges from -127 (adjust full-scale downward, zero upward) to + 127 (adjust full-scale upward, zero downward). When used in combination with the MEAS commands, an automated measurement calibration procedure can be implemented by adjusting the coefficient and reading the new measurement value iteratively until the delta between an external reference measurement device and the AC...
  • Page 93 User and Programming Manual - Rev C CALibrate:MEASure:PCURrent:ZERO <NRf> This command affects the calibration of the AC current measurement zero offset. Command Syntax CALibrate:MEASure:CURRent:ZERO <NRf> Parameters <NRf> (value range -127 to +127) Examples CAL:MEAS:CURR:ZERO +12 Query Syntax CALibrate:MEASure:CURRent:ZERO? Returned Parameters <NR1>...
  • Page 94 User and Programming Manual - Rev C CALibrate:MEASure:VOLTage:ZERO <NRf> This command affects the calibration of the rms voltage measurement zero offset. Command Syntax CALibrate:MEASure:VOLTage:ZERO <NRf> Parameters <NRf> (value range -127 to +127) Examples CAL:MEAS:VOLT:ZERO +4 Query Syntax CALibrate:MEASure:VOLTage:ZERO? Returned Parameters <NR1>...

  • Page 95: Output Calibration

    User and Programming Manual - Rev C 10.2.3 Output Calibration The AC voltage output calibration is performed by adjusting the output up or down using a calibration coefficient. The coefficient ranges from -127 (adjust upward) to + 127 (adjust downward). An external traceable reference AC voltmeter should be used for this purpose. CALibrate[:SOURce]:VOLTage <NRf>...

  • Page 96: Measurement Subsystem

    User and Programming Manual - Rev C 10.3 Measurement Subsystem This subsystem programs the measurement capability of the TL Series AC source. Subsystem Syntax :MEASure :VOLTage? Returns the rms value of voltage :CURRent? Returns the rms value of current :AMPLitude :MAX? Returns peak current :RESet...
  • Page 97 User and Programming Manual - Rev C MEASure:CURRent:AMPLitude:MAX? This query returns the peak current value of the output AC current being sourced at the output terminals. Note that the output relay must be closed to obtain current flow. The peak current measurement circuit uses a sample and hold method and latches the highest peak current value found since the last peak measurement reset command.
  • Page 98 User and Programming Manual - Rev C MEASure:POWer[:REAL]? This query returns the true power delivered to the unit under test by the AC source. Note that the output relay must be closed to obtain current flow. Query Syntax MEASure:POWer[:REAL]? Parameters None Examples MEAS:POW?

  • Page 99: Source Subsystem

    User and Programming Manual - Rev C 10.4 Source Subsystem This subsystem programs all the output parameters of the TL Series AC source. Subsystem Syntax [SOURce:] CURRent: Set the rms current limit in amps. VOLTage: [LEVel] Set the rms output voltage value in volts. RANGe: [LEVel] Set the output voltage range.
  • Page 100 User and Programming Manual - Rev C [SOURce:]FREQuency This command sets the frequency of the output sinewave. Command Syntax [SOURce:]FREQuency <NRf> Parameters range specified by the LIM:FREQ:LOW and LIM:FREQ:HIGH commands Unit Hz (Hertz) *RST Value defined by PON Examples FREQ 50 Query Syntax FREQuency? Returned Parameters...
  • Page 101 User and Programming Manual - Rev C [SOURce:]VOLT:RANGe[:LEVel] This command sets the voltage range of the power source . Two voltage ranges are available: a 135 volt range and a 270 volt range. However, TL units with optional voltage ranges are available as well. In this case, the actual voltage range values will be different. To determine the actual range values, use the query format of the RANGE command.
  • Page 102 User and Programming Manual - Rev C [SOURce:]VOLT:RANGe:AUTO This command sets the AC source range to the AUTO mode. While in AUTO mode, the AC source automatically switches to the optimal voltage range for the voltage programmed. Note that switching voltage ranges causes the output to be interrupted momentarily. If power to the unit under test cannot be interrupted, the AUTO range should not be used.

  • Page 103: Output Subsystem

    User and Programming Manual - Rev C 10.5 Output Subsystem This subsystem controls the main output function of the RP Series source. Subsystem Syntax OUTPut [:RELay] Opens or closes the output relay. DROP Drops the output voltage for a specified amount of time or indefinitely.
  • Page 104 User and Programming Manual - Rev C OUTPut:DROP The output drop command may be used to interrupt the voltage to the UUT without opening the output relay. This method used an electronic means of interrupting the AC source output which enables short interruptions of as little as 1 msec or as long as 4000 sec. In addition to short interruption times, the drop command can be set to use any of four start phase angles at which to execute the voltage drop.
  • Page 105 User and Programming Manual - Rev C OUTPut: STARt[:STATe] The output start state command is used to enable or disable the start phase logic of the AC source controller. If disabled (State = 0), any voltage drops with the OUTP:DROP command or voltage changes with the VOLT command are executed immediately without regard for the phase angle of the output sinewave.

  • Page 106: Limit Subsystem

    User and Programming Manual - Rev C 10.6 Limit Subsystem This subsystem controls the voltage frequency and current limit of the power source. These limits are set at the factory and depend on the power source rating. It is not accessible by the user.
  • Page 107 User and Programming Manual - Rev C LIMit:VOLTage? This command queries the maximum voltage the power source will operate at in the high voltage range. For TL models configured for single voltage range, only one range is available. In this case, this command will return the value for the only available voltage range.

  • Page 108: Display Subsystem

    User and Programming Manual - Rev C 10.7 Display Subsystem DISPlay:MODE This command is used to control the right hand side AC source display. The command will allow the multifunction LCD display to switch between display of frequency, current, peak current, power or power factor data.

  • Page 109: System Commands

    User and Programming Manual - Rev C 10.8 System Commands The system commands control the system level functions of the AC Source. Subsystem Syntax SYSTem: ERRor? Returns the error number and error string KLOCk Keyboard Lock. Sets the power on REMOTE/LOCAL state. LOCal Go to local mode Define the power on register number...
  • Page 110 User and Programming Manual - Rev C SYSTem:REMote This command sets the interface in the Remote state, which disables all front panel controls. This command only applies to the RS232C interface. If IEEE 488 is used, the remote/local status is determined by the REN line on the IEEE 488 interface. Command Syntax SYSTem:REMote Parameters...

  • Page 111: Common Commands

    User and Programming Manual - Rev C 10.9 Common Commands Common commands begin with an * and consist of three letters (command) or three letters and a ? (query). Common commands are defined by the IEEE 488.2 standard to perform some common interface functions.

  • Page 112: Table 10-2: Bit Configuration Of Standard Event Status Enable Register

    User and Programming Manual - Rev C 10.9.1 *CLS This command clears the following registers (see chapter 12 for descriptions of all status registers): • Standard Event Status • Status Byte • Error Queue Command Syntax *CLS Parameters None 10.9.2 *ESE This command programs the Standard Event Status Enable register bits.

  • Page 113: Table 10-3: Bit Configuration Of Standard Event Status Register

    User and Programming Manual - Rev C 10.9.3 *ESR? This query reads the Standard Event Status register. Reading the register clears it. The bit configuration of this register is the same as the Standard Event Status Enable register (see *ESE). Query Syntax *ESR? Parameters...
  • Page 114 User and Programming Manual - Rev C 10.9.4 *IDN? This query requests the source to identify itself. It returns the data in four fields separated by commas. Note that any installed options are not reflected in the *IDN? query response. The presence of these options that may affect the power source’s capabilities must be determined by querying the Limit system.

  • Page 115: Table 10-4: *Rst Default Parameter Values

    Item Value VOLT 5.0 V FREQ 60 Hz CURR 2.8 351TL VOLT:RANGe:LEVel 135 V 2.6 251TL VOLT:RANGe:AUTO 0 (OFF) OUTP 0 (OFF) DISP:MODE 1 (FREQ) OUTP:STARt:STATe 0 (OFF) OUTP:STARt:PHASe NOTE: The factory defaults cannot be used on units set to 400 Hz fixed frequency.
  • Page 116 User and Programming Manual - Rev C 10.9.7 *SAV This command stores the present state of the AC source to a specified location in memory. The RP Series offers eight non-volatile memory locations for storing instrument setups. Command Syntax *SAV Parameters 0 through 7 Related Commands...

  • Page 117: Table 10-6: Bit Configuration Of Status Byte Register

    User and Programming Manual - Rev C 10.9.9 *STB? This query reads the Status Byte register, which contains the status summary bits and the Output Queue MAV bit. Reading the Status Byte register does not clear it. The input summary bits are cleared when the appropriate event registers are read (see Section 12 for more information).
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  • Page 119: Programming Examples

    User and Programming Manual - Rev C 11 Programming Examples 11.1 Introduction This chapter contains examples on how to program the AC source. Simple examples show you how to program: • Output functions such as voltage and frequency • Measurement functions The examples in this chapter use generic SCPI commands.
  • Page 120 User and Programming Manual - Rev C Voltage Ranges The power source has two voltage ranges that are controlled by a relay. The command that controls the range is: VOLTage:RANGe 135 | 270 When the range is set to (135), the maximum rms voltage that can be programmed is 135 volts rms, but it is only on this range that the maximum output current rating is available.

  • Page 121: Making Measurements

    User and Programming Manual - Rev C 11.3 Making Measurements The source has the capability to return current, peak current, crest factor, true power, apparent power, power factor and voltage measurements. Voltage Measurement To measure the RMS voltage, use: OUTP 1 /* Close output relay if it was not closed already.
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  • Page 123: Status Registers

    User and Programming Manual - Rev C 12 Status Registers You can use status register programming to determine the operating condition of the AC source at any time. For example, you may program the AC source to generate an MSS bit when an event such as a current limit occurs.

  • Page 124: Standard Event Status Group

    User and Programming Manual - Rev C 12.2 Standard Event Status Group This group consists of an Event register and an Enable register that are programmed by Common commands. The Standard Event register latches events relating to interface communication status. It is a read-only register that is cleared when read. The Standard Event Enable register functions similarly to the enable registers of the Operation and Questionable status groups.

  • Page 125: Examples

    User and Programming Manual - Rev C 12.4 Examples The following section contains examples of commonly used operations involving the status registers. You can determine the reason for an MSS bit set by the following actions: Step 1 : Determine which summary bits are active. Use: *STB? Step 2 : Read the corresponding Event register for each summary bit to determine which events caused the summary bit to be set.

  • Page 126: Appendix A: Scpi Command Tree

    User and Programming Manual - Rev C Appendix A: SCPI Command tree Command Syntax Tree Root Level 1 Level 2 Level 3 Level 4 CALibrate :STATe :MEASure :CURRent [:FSCale] :ZERO :PCURrent [:FSCale] :ZERO :POWer [:FSCale] :ZERO :VOLTage [:FSCale] :ZERO [:SOURce]:VOLTage [SOURce] :CURRent :FREQuency...

  • Page 127: Appendix B: Scpi Conformance Information

    User and Programming Manual - Rev C Appendix B: SCPI Conformance Information SCPI Version The TL Series AC power sources conform to SCPI version 1990.0. November 2001 TL Series...

  • Page 128: Appendix C: Error Messages

    User and Programming Manual - Rev C Appendix C: Error Messages Error Number Error Message String Error Causes "No error" -100 "Command error" Generally the result of sending a command that uses incorrect syntax. -200 "Execution error" Generally the result of sending a value that is out of range, i.e., a VOLT 200 command when the unit is in the 150 V (Low) range.

  • Page 129: Index

    User and Programming Manual - Rev C Index default power on setting....... 31 Finish paint ............... 8 Acoustic ............9 form Altitude .............. 9 End-user feedback ........59 formats data.............. 79 bugs ..............59 forms bug report ............ 59 Frequency CALibrate:MEASure:CURRent:ZERO ..
  • Page 130 User and Programming Manual - Rev C Remote Inhibit ..........33 replacement parts..........58 keyboard Requirements lock out ............100 PGUI32 ............59 knob ..............26 root ..............78 Root ..............74 RS232C ............40 LabView RST ...............106 RS232C terminator........62 LED ..............53 LED indicators..........53 Safety ..............9 LIMit:CURRent? ..........
  • Page 131 User and Programming Manual - Rev C dual.............. 98 single ............98 Weight ............... 8 voltage ranges ..........18 wiring VOLTage:RANGe:AUTO ........ 93 input ............. 17 VOLTage:RANGe[:LEVel] ......92 November 2001 TL Series...

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