Agilent Technologies 6050A Operating Manual
  1. Manuals
  2. Brands
  3. Agilent Technologies Manuals
  4. Computer Hardware
  5. 6050A
  6. Operating manual
Agilent Technologies 6050A Operating Manual

Agilent Technologies 6050A Operating Manual

Electronic load mainframes
Hide thumbs
Table of Contents

Advertisement

Quick Links

Agilent Part No. 5959-3368
Microfiche Part No. 5959-3369
Operating Manual
Agilent Technologies
Electronic Load Mainframes
Models 6050A and 6051A
For instruments with Serial Numbers:
Agilent 6050A-2908A-00101 and Above
Agilent 6051A-2927A-00101 and Above
Printed in USA: October, 1997
Reprinted April, 2000

Advertisement

Table of Contents
loading

Related Manuals for Agilent Technologies 6050A

Summary of Contents for Agilent Technologies 6050A

  • Page 1 Operating Manual Agilent Technologies Electronic Load Mainframes Models 6050A and 6051A For instruments with Serial Numbers: Agilent 6050A-2908A-00101 and Above Agilent 6051A-2927A-00101 and Above Agilent Part No. 5959-3368 Printed in USA: October, 1997 Microfiche Part No. 5959-3369 Reprinted April, 2000...
  • Page 2 Export price). If Agilent Technologies is unable, within a reasonable time to repair or replace any product to condition as warranted, the Customer shall be entitled to a refund of the purchase price upon return of the product to Agilent Technologies...

  • Page 3: Safety Summary

    Because of the danger of introducing additional hazards, do not install substitute parts or perform any unauthorized modification to the instrument. Return the instrument to an Agilent Technologies Sales and Service Office for service and repair to ensure that safety features are maintained.
  • Page 4 SAFETY SUMMARY (continued) GENERAL Any LEDs used in this product are Class 1 LEDs as per IEC 825-l. ENVIRONMENTAL CONDITIONS This instruments is intended for indoor use in an installation category II, pollution degree 2 environment. It is designed to operate at a maximum relative humidity of 95% and at altitudes of up to 2000 meters.

  • Page 5: Declaration Of Conformity

    This document contains proprietary information protected by copyright. All rights are reserved. No part of this document may be photocopied, reproduced, or translated into another language without the prior consent of Agilent Technologies The information contained in this document is subject to change without notice.
  • Page 6 Introduction to Programming Language Dictionary Status Reporting Agilent 6050A/605L4 Service Manual Module Service Manuals * Supplied with Agilent 6050A/6051A Electronic Load Mainframe. ** Supplied with individual load modules. *** Available for purchase. Supplied with instrument if ordered as Option 910.

  • Page 7: Table Of Contents

    Table of Contents General Information What’s in this Manual ..........................11 Options ...............................11 Safety Requirements...........................12 Specifications .............................12 Operation Overview Introduction ..............................15 Front Panel Description..........................16 Remote Programming..........................16 Local/Remote Control ..........................16 Extended Power Operation.........................17 Programmable Features ..........................17 Modes of Operation..........................17 Constant Current CC (Mode) ........................18 Ranges ..............................18 Immediate Current Level.........................18 Triggered Current Level ..........................18...
  • Page 8 Table of Contents (continued) Overcurrent..............................29 Overpower...............................29 Overtemperature............................30 Reverse Voltage ............................30 Control Connector ............................30 Remote Sensing............................30 Monitor Outputs ............................30 External Programming Input ........................31 Fault.................................31 Port On/Off..............................31 Installation Introduction ..............................33 Inspection ..............................33 Installing The Modules..........................33 Procedure ..............................34 Channel Number............................35 Installing The Mainframes..........................35 Cooling ..............................36 Rack Mounting ............................36 Turn-On Checkout............................36...
  • Page 9 Pulsed Transient Operation Example ......................72 Synchronous Toggled Transient Operation Example ................72 Calibration Introduction ..............................75 Equipment Required...........................75 Calibration Commands ..........................76 Calibration Flowcharts ..........................77 Example Programs .............................77 Considerations for Operating in Constant Resistance Mode ............91 Index ................................93 Agilent Sales and Support Offices......................97...

  • Page 11: General Information

    This manual applies to both the Agilent 6050A and Agilent 6051A Electronic Load mainframes. The two mainframes are functionally identical, but the Agilent 6051A is a half-rack width unit, with only two slots for load modules. Most of the information given in this manual applies to both mainframes. Where differences occur, information specific just to the Agilent 6051A is given in parentheses following information that applies only to the Agilent 6050A, for example: ...

  • Page 12: Safety Requirements

    UL 1244-Electrical and electronic measuring and testing equipment. Specifications Table 1-1 lists the specifications and supplemental characteristics for the Agilent 6050A/6051A Electronic Load mainframe. All specifications apply over an operating range of 0 to +55 C for the mainframe. Specifications are guaranteed through the warranty of the product.
  • Page 13 Table 1-1. Agilent 6050A/6051A Specifications and Supplemental Characteristics (continued) Weight: Net (mainframe only): Agilent 6050A, 9.5 kg (21 lb.) Agilent 6051A, 5.5 kg (12 lb.) Shipping: Agilent 6050A, 14 kg (31 lb.) Agilent 6051A, 7.5 kg (17 lb.) Dimensions: Width: Agilent 6050A, 425.5 mm (16.75 in.)

  • Page 15: Operation Overview

    Refer to the module-specific pages provided with each module for the actual values. Programs written for the Agilent 6060 series of single Electronic Loads can be used with the multiple loads, easing program development for applications using various members of the Agilent Electronic Load family. (Triggering via the ac line frequency or the load’s internal timer is available only in the multiple load mainframe.)

  • Page 16: Front Panel Description

    Details of local operation are covered in Chapter 4 - Local Operation and fundamentals of remote programming are given in Chapter 5 - Remote Operation. Complete HPSL programming details are given in the Agilent Electronic Loads Programming Reference Guide. The remaining paragraphs in this chapter describe the operating modes, transient...

  • Page 17: Extended Power Operation

    Extended Power Operation Note: Extended power operation is not available on "B " load modules (Agilent Models 60501B-60507B). In addition, this feature may not be present in "A" modules produced after 1989. The extended power feature allows a module to dissipate considerably more than its nominal power rating in many cases.

  • Page 18: Constant Current Cc (Mode)

    When programmed to a mode, a module remains in that mode until the mode is changed or until a fault condition, such as an overpower or overtemperature, occurs. When changing modes, the module’s input is momentarily disabled (non-conducting state) before the new mode is enabled. This insures that there will be minimum overshoots when changing modes. The current, resistance, and voltage mode parameters described in subsequent paragraphs can be programmed whether or not the mode is presently selected.

  • Page 19: Transient Current Level

    Electronic Load are described later in this chapter. The Electronic Load has a status reporting capability to keep track of pending triggers and other operating conditions. The status reporting capability is described in detail in the Agilent Electronic Loads Programming Reference Guide.

  • Page 20: Ranges

    Ranges Resistance may be programmed in any of three overlapping ranges (low, middle, high). The range can be set at the front panel ( , and ENTRY keys) or via the GPIB (RES:RANG command). Any value in the low range selects the low range.

  • Page 21: Immediate Voltage Level

    Figure 2-4. Constant Voltage Mode Immediate Voltage Level The voltage level can be set at the front panel ( and ENTRY keys) or via the GPIB (VOLT command). If the CV mode is the active mode, the new setting immediately changes the input at a rate determined by the voltage slew setting. If the module is not in the CV mode, the new setting is saved for use when the mode is changed to CV.

  • Page 22: Continuous Transient Operation

    Continuous Transient Operation In continuous operation, a repetitive pulse train switches between two load levels. Continuous transient operation is selected via the GPIB using the TRAN:MODE CONT command. For front panel operation, continuous transient operation is automatically selected when transient operation is turned on( key).

  • Page 23: Toggled Transient Operation

    b. One pulse results from each trigger. Therefore, frequency cannot be programmed. The main level, transient level, and slew rate are programmed as described for continuous operation. The pulse width is programmable from 0.00005 to 4 seconds via the GPIB (TRAN:TWID command). Pulsed transient operation cannot be programmed at the front panel.

  • Page 24: Triggered Operation

    Three triggering methods are available over the GPIB: the GET function, the *TRG common HPSL command, and the TRIG subsystem HPSL command (refer to Agilent Electronic Loads Programming Reference Guide ). The HPSL TRIG subsystem allows you to select either the ac line frequency, internal timer, or TRIG command as the trigger source. There is also a TRIGGER connector on the rear panel for external trigger inputs.

  • Page 25: Slew Rate And Minimum Transition Time

    DVM, or another Electronic Load mainframe. The Electronic Load has a status reporting capability to keep track of trigger operations. Refer to ’Status Reporting’ in the Agilent Electronic Loads Programming Reference Guide. Slew Rate And Minimum Transition Time Slew rate is defined as the change in current or voltage over time.

  • Page 26: Input Current, Voltage, And Power Measurement

    Input Current, Voltage, and Power Measurement Each module’s input current, voltage, and power can be measured at the front panel ( key) or via the GPIB (MEAS command). With local (front panel) control in effect, pressing will continually step the display through voltage and current input values, the computed power value, and various status conditions for the selected channel.

  • Page 27: Input On/Off

    Pressing the Short On/Off key with certain user applications may cause damage to the equipment being tested, which may result in personal injury. Contact your Agilent Sales and Service office if you need to have the Short On/Off key disabled.

  • Page 28: Status Reporting

    The Electronic Load incorporates a status reporting capability. Various status conditions within the Electronic Load can be reported using this capability. The user determines which condition(s) will be reported. Chapter 5 of the Agilent Electronic Loads Programming Reference Guide describes each of the status registers in the Electronic Load. (These registers, including the channel status registers, are all maintained in the mainframe.) Notice that the same information is available in...

  • Page 29: Overvoltage

    The Fault signal is latched true (high TTL level) when the VF bit in the status register goes true. The Fault output signal (see Chapter 3 - Installation) can be used to trip an external circuit breaker or control a relay (e.g., Agilent 59510A Relay Accessory) in order to disconnect the Electronic Load input from the source it is testing when an overvoltage or a reverse voltage condition occurs.

  • Page 30: Overtemperature

    If the hardware power-limit circuit becomes active, it attempts to limit power by limiting the current drawn by the load. Once the power has been returned to the safe operating area, the protective circuit allows the current to rise again. This protective sequence can turn on and off (approximately 5% of full scale peak-to-peak) at rates from 2 kHz to 12 kHz.

  • Page 31: External Programming Input

    External Programming Input CC and CV modes can be programmed with a signal (ac or dc) connected to the Ext Prog input. A 0-to-10V external signal corresponds to the 0-to-full scale input range in CV mode or in CC mode. The external programming signal is combined with the value programmed via the GPIB or the front panel, so that, for example, a programmed value of one-half full scale and a 5-volt external programming input would produce a full-scale value at the input.

  • Page 33: Installation

    Installation Introduction This chapter discusses how to install the modules and make connections to the rear panel of your Agilent 6050A or Agilent 6051A Electronic Loads. A turn-on checkout procedure as well as application considerations for specific operating modes are also discussed.

  • Page 34: Procedure

    Grasp the module using the quarter-turn locking fastener and the input binding posts. This reduces the possibility of damage to static sensitive components on the PC board. Start installing the modules in the slot next to the GPIB board (see Figure 3-2.) Figure 3-2. Limiting Modules In an Agilent 34 Installation...

  • Page 35: Channel Number

    Installing The Mainframes The dimensions of the Agilent 6050A and Agilent 6051A Electronic Loads are specified in Chapter 1. The mainframes have plastic feet that are shaped to ensure self-alignment when stacked with other Agilent System II instruments. The feet can be removed for rack mounting.

  • Page 36: Cooling

    Rack Mounting The Agilent 6050A Electronic Load can be mounted in a standard 19-inch rack panel or cabinet. Rack mount kits are available as Option 908 and 909 (with handles). Support rails are also required for rack mounting. These are normally supplied with the cabinet and are not included with the rack mount options.

  • Page 37: Changing Line Voltage

    Check that the unit has been factory set to the correct line voltage. Refer to the factory check mark on the rear panel LINE label next to the power connector. Check that the power cord is connected to the ac input socket. SHOCK HAZARD The power cord provides a chassis ground through a third conductor.

  • Page 38: Turn-On/Selftest

    Another indication that a selftest failure has occurred is if the ERR annunciator on the display remains on after selftest completes. If the Electronic Load has failed selftest, the mainframe or module to the nearest Agilent Sales and Service Office for repair. 38 Installation...

  • Page 39: Power Test

    Power Test Note The following checkout assumes that the Electronic Load is set to the factory defaults. Refer to Chapter 4 if you need to recall the factory default values. Use a power supply with the voltage set to 10 V and the current limit set to 10 A to check the input circuit on each module. The settings of the power supply and the values used in the procedure were selected so that they can be used with any module.

  • Page 40: Gpib Address

    ENTRY keys. Chapter 4 explains how to change the GPIB address. Rear Panel Connectors and Switches Figure 3-8 shows the rear panel of the Agilent 6050A Electronic Load. The input binding posts, control connectors, and trigger connector are used for application connections.

  • Page 41: Control Connector

    Figure 3-9. Input Binding Post Control Connector A ten-pin connector and a quick-disconnect mating plug (Agilent part number 0360-2345) are provided on each module for connecting remote sense leads, external V/I monitors, an external programming input, and external control lines (see Figure 3-10).
  • Page 42 Figure 3-10. Control Connector and Cover Used to connect the remote sense leads to the power source. Pin + S connects the + S signal and pin - S +Sand -S connects the - S signal. Remote sensing can only be used in CV and CR modes. IM and VM Used to monitor the module’s input current and voltage.

  • Page 43: Trigger Connector

    Trigger Connector A four-pin connector and a quick connect mating plug (Agilent part number 1252-1488) are provided on each mainframe for input and output trigger signals (see Figure 3-11). The mating plug is packaged in an envelope that is included with the mainframe.

  • Page 44: Local Sense Connections

    Table 3-1. Stranded Copper Wire Ampere Capacity Wire Size Ampacity Notes: 1. Ratings for AWG-sized wires derived from MIL-W-5088B. Cross Section Area in mm Ratings for metric-sized wires derived from IEC Publication 33-51. 8.33 0.75 15.4 2. Ampacity of aluminum wire is approximately 84% of that 13.5 listed for copper wire.

  • Page 45: Zero-Volt Loading Connections

    Table 3-2. Maximum Wire Lengths to Limit Voltage Drops Wire Size Resistivity Maximum Length in Meters (Feet) to Limit Voltage Drop to 0.5 V or Less Cross Section Area in mm2 10 A 20 A 30 A 40 A 50 A 60 A /kft 16.15...
  • Page 46 Figure 3-12. Local Sensing Figure 3-13. Remote Sensing 46 Installation...
  • Page 47 Figure 3-14. Parallel Operation Figure 3-15. Zero-Volt Loading Installation 47...

  • Page 49: Local Operation

    Figure 4-1, the front panel’s controls and indicators include a 12-segment LCD display and a keypad having four groups of keys (SYSTEM, CHAN, FUNCTION, and ENTRY). Table 4-1 gives a brief description of each control and indicator. Figure 4.1. Agilent 6050A Front Panel Table 4-1. Controls and Indicators...
  • Page 50 Table 4-1. Controls and Indicators (continued) Item Description 3 Electronic Load CC-Indicates the selected channel is in the constant current (CC) mode. Status Note that Figure 4-1 illustrates that channel 1 is in the CC mode (CC annunciator is on). Annunicators CR-Indicates the selected input channel is in the constant resistance (CR) mode.
  • Page 51 Table 4-1. Controls and Indicators (continued) Item Description 6 CHAN Keys Used in conjunction with the ENTRY keys to select a channel (module) for front panel control and/or display. - Identifies which module is installed in the selected input channel. Increment( ) and decrement ( ) the channel number.

  • Page 52: Local Control Overview

    Table 4-1. Controls and Indicators (continued) Item Description 7 FUNCTION Keys - Displays the selected channel’s active mode: CC (MODE CURR), CR (MODE RES), (continued) or CV (MODE VOLT). The active mode can be changed using the CURR, RES, or VOLT key followed by the Enter key.

  • Page 53: Using The Chan Keys

    When programming the Multiple Electronic Load remotely, you can use the Multiple Electronic Load’s status reporting capability to check the state of the protection features. Refer to Chapter 5 Status Reporting in the Agilent Electronic Load Family Programming Reference Guide.

  • Page 54: Selecting The Channel

    The Ident key is used to identify which module is installed in the selected channel. For example, with channel 1 selected, press and observe the display. Assuming that the Agilent 60502A 300 Watt Module is installed in channel 1, the display will indicate: "l 60V 60A"...
  • Page 55 Figure 4-2. Recommended Programming Sequence Local Operation 55...

  • Page 56: Setting The Mode Of Operation

    Changing the programming range can cause the present CC settings (main level, transient level, and slew rate) to be automatically adjusted to fit within the new range. For example, assume that you are programming the Agilent 60502A 300 Watt Module, the present range is the high range (0 to 60A, C:RNG 60.000), and the present CC settings are: "CURR 10.000"...

  • Page 57: Setting Cr Values

    Changing the programming range can cause the present CR settings to be automatically adjusted to fit within the new range. For example, assume that you are programming the Agilent 60502A 300 Watt module, the present range is the middle range (1 to 1 k ohms, R:RNG 1000.0), and the present settings are:...

  • Page 58: Examples

    "RES 50.000" - main level is 50 ohms. "R:TLV 40.000" - transient level is 40 ohms. "C:SLW.50000" - slew rate is 0.5 A/ s (middle resistance range uses the CC slew rate setting). If you now select the low range (0 to 1 ohm, R:RNG 1.0000), the settings will automatically be changed to fit into the new range as follows: "RES 1.0000"...

  • Page 59: Setting Cv Values

    and the maximum voltage slew rate. The Multiple Electronic Load automatically selects the voltage slew rate when the low resistance range is selected. Set the slew rate to 0.25 V/ s by pressing Press again and check that the display indicates "V:SLW 0.2500" (or the closest slew rate step to this value for the particular module being programmed).

  • Page 60: Transient Operation

    You can see the VOLT setting being incremented or decremented each time you press the applicable Input key. The values are entered automatically (you don’t press the Enter key). Remember if the CV mode is active, the incremented or decremented values will immediately change the actual input. Set Slew Rate - There are 12 discrete steps within the voltage slew range.

  • Page 61: Shorting The Input

    Pressing the Short On/Off key with certain user applications may cause damage to the equipment being tested, which may result in personal injury. Contact your Agilent Sales and Service office if you need to have the Short On/Off key disabled.

  • Page 62: Using The System Keys

    The error codes are negative numbers in the range from - 100 to - 499. Refer to the Agilent Electronic Loads Programming Reference Guide for a description of the error codes.

  • Page 63: Changing "Wake-Up" Settings

    Settings stored in registers 1 through 6 will be lost when the Electronic Load’s power is cycled. When power is turned off and then on again, each of these registers (1 through 6) will be set to the "wake-up" values. The "wake-up" values are stored in register 0 and can be set to any values you desire (see Changing Wake-up Settings below).

  • Page 65: Remote Operation

    Series 300 computers. You may convert examples for use with any other language or computer. Enter/Output Statements You need to know the statements your computer uses to output and enter information. For example, the Agilent BASIC language statement that addresses the Multiple Electronic Load to listen and sends information to the Multiple Electronic...

  • Page 66: Sending A Remote Command

    Sending A Remote Command To send the Multiple Electronic Load a remote command, combine your computer’s output statement with the GPIB interface select code, the GPIB device (Multiple Electronic Load) address, and finally the Multiple Electronic Load’s HPSL command. For example, to set the input current of a previously specified channel to 10 amps, send: Selecting A Channel Most of the remote commands are channel specific, that is, they are directed to the channel which was most recently specified by the CHAN command.

  • Page 67: Remote Programming Commands

    Remote Programming Commands The Multiple Electronic Load command set consists of more than 60 HPSL compatible commands. The HPSL commands have many optional key words which can be used to document your programs. Most of the commands have a query syntax which allows the present parameter settings to be read back to the controller.

  • Page 68: Cc Mode Example

    indicated by the value 9.9E + 37 instead of the normal voltage or power readings. This is the IEEE 488.2 value for positive infinity. CC Mode Example This example selects channel 1, sets the current level to 1.25 amps and then reads back the actual current value. 10 OUTPUT 705;...
  • Page 69 Figure 5-1. Remote Programming Flowchart (Sheet 1) Remote Operation 69...
  • Page 70 Figure 5-1. Remote Programming Flowchart (Sheet 2) 70 Remote Operation...

  • Page 71: Cr Mode Example

    CR Mode Example This example selects channel 1, sets the current protection limit to 2 amps, programs the resistance level to 100 ohms, and reads back the computed power. See Appendix A for considerations regarding high-resistance applications. 10 OUTPUT 705;"CHAN 1;:INPUT OFF" 20 OUTPUT 705;...

  • Page 72: Pulsed Transient Operation Example

    Pulsed Transient Operation Example This example selects channel 1, sets the CR levels, selects the bus as the trigger source, sets the fastest slew rate, programs a pulse width of 1 millisecond, and turns on transient operation. When the *TRG command is received, a 1 millisecond pulse is generated at the channel 1 input.
  • Page 73 140 OUTPUT 705; "TRIG:SOUR TIM" 150 END Line 10: Selects channel 1 and turns the input off. Line 20: Selects the CV mode. Line 30: Sets the main voltage level to 5 volts. Line 40: Sets the transient voltage level to 10 volts and the voltage slew rate to maximum. Line 50: Selects toggled transient operation.

  • Page 75: Calibration

    Calibration Introduction This chapter describes the calibration procedures for the Agilent 6050A and 6051A Electronic Load mainframe and its associated modules. Both "A" modules (Agilent Models 60501A-60504A) and "B" modules (Agilent Models 60501B- 60507B) are covered in separate procedures. The Electronic Load should be calibrated annually, or whenever certain repairs are made (refer to the Service Manual).

  • Page 76: Calibration Commands

    Calibration Commands The following calibration commands are required to calibrate the Electronic Load. They are used in the example program included in this section. Refer to the Agilent Electronic Loads Programming Reference Guide for syntax requirements for HPSL commands. CALibration:[MODE] ON|OFF|1|0 Turns the calibration mode on or off.

  • Page 77: Calibration Flowcharts

    Example Programs Each example program in this chapter is written in the, Agilent BASIC Language. If you are using an HP Series 200/300 computer, simply type in the program and run it. If you are using a different computer or programming language, you will have to modify the program before you can run it.
  • Page 78 Figure 6-2. Calibration Flowchart for "A" Modules 78 Calibration...
  • Page 79 Figure 6-2. Calibration Flowchart for "A" Modules (continued) Calibration 79...
  • Page 80 Figure 6-2. Calibration Flowchart for "A" Modules (continued) 80 Calibration...
  • Page 81 Program Listing for "A" Modules Load=705 Chan= 1 OUTPUT Load;"CHAN";Chan;";CAL ON" Cal_curr(Load,Chan,Hi_curr_rng,Hi_curr_hipt,Hi_curr_lopt,l); Cal_curr(Load,Chan,Lo_curr_rngLo_cu,rr_hipt,Lo_curr_lopt,0) Cal_volt(Load,Chan,Volt_hipt,Volt_lopt) Cal_res(Load,Chan,Lo_res_rng,Lo_res_hipt,Lo_res_lopt,0) Cal_res.(Load,Chan,Mid_res_rng,Mid_res_hipt,Mid_res_lopt,l) Cal_res(Load,Chan,Hi_res_rng,Hi_res_hipt,Hi_res lopt,l), OUTPUT Load;l"CAL:SAVE" OUTPUT Load;"CAL OFF" SUB Cal_curr(Load,Chan,Curr_rng,Curr_hipt,Curr_lopt,Flag) PRINT "CURRENT CALIBRATION, RANGE ";Curr_rng PRINT "Set power supply according to module calibration table" PRINT "Use the correct current shunt for the range you are calibrating" PRINT "Press CONTINUE when ready"...
  • Page 82 Program Listing for "A" Modules (continued) PRINT "VOLTAGE CALIBRATION" PRINT "Set power supply according to module calibration table" PRINT "Press CONTINUE when ready" PAUSE OUTPUT Load;"CHAN";Chan OUTPUT Load;"MODE:VOLT" OUTPUT Load;"VOLT";Volt_hipt INPUT "Enter voltage across inputs for high point in volts",Hipt_volts OUTPUT Load;"CAL:LEV:HIGH";Hipt_volts OUTPUT Load;"CAL:MEAS:HIGH";Hipt_volts OUTPUT Load;"VOLT";Volt_lopt...
  • Page 83 Program Listing for "A" Modules (continued) 1030 IF Flag THEN 1040 OUTPUT Load;"RES";Res_hipt 1050 ELSE 1060 OUTPUT Load;"RES";Res_lopt 1070 END IF 1080 OUTPUT Load;"TRAN:MODE TOGG" 1090 OUTPUT Load;"TRIG:SOUR BUS" 1100 OUTPUT Load;"TRAN ON" 1110 IF Flag THEN 1120 OUTPUT Load;"RES:TLEV";Res_lopt 1130 ELSE 1140...
  • Page 84 LINE 610 Set low calibration point LINE 630 Send measurement in volts for low main calibration point LINE 640 Send measurement in volts for low readback calibration point LINE 680 Set low calibration point LINE 690-700 Select transient toggle mode and GPIB trigger source LINE 710-720 Turn transient mode on and set transient calibration point LINE 730...
  • Page 85 Figure 6-3. Calibration Flowchart for "B" Modules Calibration 85...
  • Page 86 Figure 6-3. Calibration Flowchart for "B" Modules (continued) 86 Calibration...
  • Page 87 Figure 6-3. Calibration Flowchart for "B" Modules (continued) Calibration 87...
  • Page 88 Program Listing for "B" Modules ASSIGN @Ld TO 705 Chan=l OUTPUT @Ld;”CHAN”;Chan;”;CAL ON" Cal_curr(@Ld,Chan,Hi_curr_rng,Hi_curr_offset,l) Cal_curr(@Ld,Chan,Lo_curr_rng,Lo_curr_offset,0) Cal_volt(@Ld,Chan,Volt_hipt,Volt_lopt) Cal_res(@Ld,Chan,Lo_res_rng,Lo_res_hipt,Lo_res_lopt,0) Cal_res(@Ld,Chan,Mid_res_rng,Mid_res_hipt,Mid_res_lopt,l) Cal_res(@Ld,Chan,Hi_res_rng,Hi_res_hipt,Hi_res_lopt,1) OUTPUT @Ld;"CAL:SAV" OUTPUT @Ld;"CAL OFF" CLEAR SCREEN PRINT TABXY(10,10);"CALIBRATION DONE" SUB Cal_curr(@Ld,Chan,Curr_rng,Curr_offset,Flag) PRINT "CURRENT CALIBRATION, RANGE ";Curr_rng PRINT "Set power supply according to calibration information table" PRINT "Use the correct current shunt for the range you are calibrating"...
  • Page 89 Program Listing for "B" Modules (continued) OUTPUT @Ld;"*TRG" IF Flag THEN WAIT 30 INPUT "Enter current through shunt for high point in amps",Trpt_curr OUTPUT @Ld;"CAL:TLEV";Trpt_curr OUTPUT @Ld;"TRAN OFF" PRINT "Test unit to verify that transient values are in spec" PRINT "Press CONT when ready to calibrate next range or mode" PAUSE SUBEND SUB Cal_volt(@Ld,Chan,Volt_hipt,Volt_lopt)
  • Page 90 Program Listing for "B" Modules (continued) 1040 1050 SUB Cal_res(@Ld,Chan,Res_rng,Res_hipt,Res_lopt,Flag) 1060 PRINT "RESISTANCE CALIBRATION, RANGE";Res_rng 1070 PRINT "Set power supply to calibration information table" 1080 PRINT "Press CONT when ready to continue" 1090 PAUSE 1100 OUTPUT @Ld;"CHAN";Chan 1110 OUTPUT @Ld;"MODE:RES" 1120 OUTPUT @Ld;"RES:RANG";Res_rng 1130...

  • Page 91: Considerations For Operating In Constant Resistance Mode

    Mode The Agilent Electronic Loads implement Constant Resistance. (CR) mode by using either the CV circuits or CC circuits to regulate the input. The low range is regulated with the CV circuits, using the input current monitor as the reference.
  • Page 92 If large resistances are required, the accuracy can be improved by reading the voltage and current directly from the load, calculating the actual resistance, and then adjusting the programmed value accordingly. This technique is most practical in applications requiring a fixed resistive load. The following examples illustrate the worst-case error possibilities resulting from op amp offsets.

  • Page 93: Index

    INDEX aliases ..................................16 ampere-capacity................................44 annunciators.................................50 application connections ...............................43 binding posts................................40 calibration commands..............................76 calibration equipment ..............................75 calibration example..............................77 CC mode example................................68 channel keys.................................51 change pages................................33 channel number................................35 channel status................................28 checkout..................................36 computed power ................................53 computed power value..............................53 connector cover ................................42 constant current (CC) mode............................18 constant resistance (CR) mode..........................19, 91 constant voltage (CV) mode ............................20 continuous transient operation ..........................22, 71...
  • Page 94 INDEX (continued) front panel display ..............................49, 52 FUNCtion ..................................16 function keys................................53 GPIB address ..............................43, 60, 65 GPIB connector ..............................38, 39 GPIB device ................................65 GPIB interface ...............................16, 65 HPSL commands .............................16, 65, 66 immediate current level ...............................18 immediate resistance level ............................20 immediate voltage level ...............................21 input connections.................................40 INPUT OFF ........................
  • Page 95 INDEX (continued) oscillation ..................................29 OUTPut ..................................16 output statement................................65 overcurrent................................29, 53 overload condition ...............................53 overpower ................................29, 53 overtemperature ..............................29, 53 overvoltage ................................28, 53 parallel connections ..............................44 port on/off................................31, 42 power cord ...................................33 power test..................................39 power-limit curves ...............................16 programmable current protection..........................66 programming mode..............................49 protection features ..............................28, 53 protection shutdown..............................53 pulse delay ...................................23...
  • Page 96 INDEX (continued) setting CC values .................................56 setting CR values .................................57 setting CV values.................................59 setting the mode of operation............................56 SHORT ON .................................53 shorting the input .................................61 shunt voltage................................21 slew rate..............................19, 20, 21, 25 software current limit..............................19 status reporting ..............................28, 53 synchronous transient operation ..........................72 system keys................................50, 62 toggled transient operation ............................23, 72 transient current level ..............................19...

  • Page 97: Agilent Sales And Support Offices

    Agilent Sales and Support Offices For more information about Agilent Technologies test and measurement products, applications, services, and for a current sales office listing, visit our web site: http://www.agilent.com/find/tmdir You can also contact one of the following centers and ask for a test and measurement sales representative.
  • Page 98 Manual Updates The following updates have been made to this manual since the print revision indicated on the title page. 4/15/00 All references to HP have been changed to Agilent. All references to HP-IB have been changed to GPIB.

This manual is also suitable for:

6051a

Table of Contents