Agilent 6051A - Manuals

7 Table of Contents 1. General Information What’s in this Manual ....................................................................................................... ......................... 11 Options .................................................................................................

General Information 11 1 General Information What’s In This Manual 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...

12 General Information Safety Requirements This product is a Safety Class 1 instrument, which means that it is provided with a protective earth ground terminal. Thisterminal must be connected to an ac source that has a 3-wire ground receptacle. Review the instrument rear panel and thismanual for saf...

General Information 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: Agil...

Operation Overview 15 2 Operation Overview Introduction The Agilent 6050A and Agilent 6051A Multiple Input Electronic Load Mainframes are used for design, manufacturing, andevaluation of dc power supplies, batteries, and power components. Other applications include use as a power circuitbreaker or c...

16 Operation Overview Front Panel Description The front panel includes a 12-character alphanumeric display, 11 status indicators, and four groups of keypads. Ordinarilythe alphanumeric display shows the number of the channel presently under front-panel control, and the input voltage andcurrent of th...

Operation Overview 17 operation, protection features, and other operating features of the Electronic Load. 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" ...

18 Operation Overview When programmed to a mode, a module remains in that mode until the mode is changed or until a fault condition, such as anoverpower or overtemperature, occurs. When changing modes, the module’s input is momentarily disabled (non-conductingstate) before the new mode is enabled. T...

Operation Overview 19 Electronic Load are described later in this chapter. The Electronic Load has a status reporting capability to keep track ofpending triggers and other operating conditions. The status reporting capability is described in detail in the AgilentElectronic Loads Programming Referenc...

20 Operation Overview Ranges Resistance may be programmed in any of three overlapping ranges (low, middle, high). The range can be set at the frontpanel ( , , and ENTRY keys) or via the GPIB ( RES:RANG command). Any value in the low range selects the low range. Any value that is within the middle ra...

Operation Overview 21 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...

22 Operation Overview Continuous Transient Operation In continuous operation, a repetitive pulse train switches between two load levels. Continuous transient operation isselected via the GPIB using the TRAN:MODE CONT command. For front panel operation, continuous transientoperation is automatically ...

24 Operation Overview HPSL Command Description TRIG:SOUR EXT Selects the external trigger input source. TRAN:MODE TOGG Selects toggled operation. CURR 5 Sets main current level to 5 amps. CURR:TLEV 10 Sets transient current level to 10 amps. TRAN ON Turns on transient operation. Figure 2-7 shows the...

26 Operation Overview 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 cur...

28 Operation Overview The SYST:ERR? query (or key) reads back the errors in the order in which they occurred (the error queue can hold up to 30 entries). Once the error is read back it is removed from the list. A value 0 indicates there is no error; and 0 will be returned when all errors in the list...

Operation Overview 29 Overvoltage The overvoltage protection circuit is set at a predetermined voltage, which cannot be changed. If the overvoltage circuit hastripped, the module will attempt to limit the voltage by drawing current from the DC source. The module limits the value ofcurrent drawn such...

30 Operation Overview 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. Thisprotective sequence can turn on an...

Operation Overview 31 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 signalcorresponds to the 0-to-full scale input range in CV mode or in CC mode. The external programming signal is combinedwith the value pr...

Installation 33 3 Installation Introduction This chapter discusses how to install the modules and make connections to the rear panel of your Agilent 6050A or Agilent6051A Electronic Loads. A turn-on checkout procedure as well as application considerations for specific operating modesare also discuss...

34 Installation has only enough room for two single-width modules or one double-width module. The module installation procedure is thesame for both mainframes. Figure 3-1. Power Cord Configurations Procedure 1. With the mainframe off, disconnect the power cord and remove the top cover by loosening t...

Installation 35 5. Lock the module in place using the quarter-turn locking fastener and the rear panel thumbscrew. Hand- tighten only. 6. Connect the three ribbon cables to the adjacent connector pins in the GPIB board (or adjacent module). Make sure the connectors are properly seated. 7. If applica...

36 Installation Cooling The Electronic Loads can operate without loss of performance within the temperature range of 0 ° to 40 ° C, and with derated performance from 40 ° to 55 ° C. However, you must install your Electronic Load in a location that allows sufficient space at the top, sides, and rear ...

Installation 37 • Check that the unit has been factory set to the correct line voltage. Refer to the factory check mark on the rear panelLINE 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 thro...

40 Installation GPIB Address The GPIB address of the Electronic Load is factory set to address 5. The GPIB address can only be set using the front panel and 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 Agilen...

Installation 41 3. Hand tighten the adjustment knob to secure the wire in the binding post. If you are using a slotted screwdriver, tighten the knob to 8 in. -lbf for a secure connection.. Do not use lubricants or contact cleaners on the binding posts. Certain chemical agents can damage theLEXAN mat...

Installation 43 Trigger Connector A four-pin connector and a quick connect mating plug (Agilent part number 1252-1488) are provided on each mainframefor input and output trigger signals (see Figure 3-11). The mating plug is packaged in an envelope that is included with themainframe. Consistent with ...

Installation 45 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 AWG Area in mm2 Ω /kft Ω /km 5 A 10 A 20 A 30 A 40 A 50 A 60 A 22 16.15 (6) (3) (1.5) (1) (0.77) (0.62) (0.52) 0.5 40.1 2....

46 Installation Figure 3-12. Local Sensing Figure 3-13. Remote Sensing

Installation 47 Figure 3-14. Parallel Operation Figure 3-15. Zero-Volt Loading

Local Operation 49 4 Local Operation Introduction Chapter 2 Operation Overview introduced you to the Multiple Electronic Load’s features and capabilities and brieflydescribed how to control a module locally from the front panel and remotely with a computer via the GPIB. This chapter describes in gre...

50 Local Operation Table 4-1. Controls and Indicators (continued) Item Description 3 Electronic Load Status Annunicators CC-Indicates the selected channel is in the constant current (CC) mode. Note that Figure 4-1 illustrates that channel 1 is in the CC mode (CC annunciator is on). CR-Indicates the ...

Local Operation 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. and Increment( ) and decre...

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

Local Operation 53 With local control in effect, you can select a channel and use the front panel display to view the input voltage/current valuesand the computed power value as well as certain fault and status conditions that may be present. This is referred to as themetering mode. The display can ...

54 Local Operation Selecting the Channel You can select a channel in either of two ways: 1. You can use the Channel key in conjunction with the ENTRY keys to select a channel. For example, to selectchannel 1 press: 2. You can use the and keys to increment ( ) and decrement ( ) the channel number. Th...

56 Local Operation Note The CC, CR, and CV values described in subsequent paragraphs can be programmed whether or not theassociated mode is active. When a mode is selected, all of the associated values will take effect at theinput provided that the input is turned on. Setting the Mode of Operation T...

60 Local Operation You can see the VOLT setting being incremented or decremented each time you press the applicable Input key. The valuesare entered automatically (you don’t press the Enter key). Remember if the CV mode is active, the incremented ordecremented values will immediately change the actu...

Local Operation 61 1. Setup CC Values a. Set the main CC level to 1 amp, the transient CC level to 2 amps, and the slew rate to 0. 15 A/ µ s. See examples under Setting CC Values. b. Turn on CC mode by pressing: 2. Set frequency to 5 kHz by pressing: 3. Set duty cycle to 25% by pressing: (blue shift...

62 Local Operation Using The System Keys These keys consist of Local, Address, Error (shifted Address key), Recall, Save (shifted Recall key), and the blue shift key(bottom key in the SYSTEM column). The Local key and the Shift key have already been discussed. The remainingSYSTEM keys are described ...

Remote Operation 65 5 Remote Operation Introduction Chapter 4 - Local Operation described how to program the Multiple Electronic Load manually using the front panel keys.This chapter describes the fundamentals of programming the Multiple Electronic Load remotely from a GPIB controller Thesimilaritie...

66 Remote Operation Sending A Remote Command To send the Multiple Electronic Load a remote command, combine your computer’s output statement with the GPIBinterface select code, the GPIB device (Multiple Electronic Load) address, and finally the Multiple Electronic Load’s HPSLcommand. For example, to...

Remote Operation 67 Remote Programming Commands The Multiple Electronic Load command set consists of more than 60 HPSL compatible commands. The HPSL commandshave many optional key words which can be used to document your programs. Most of the commands have a query syntaxwhich allows the present para...

Remote Operation 69 Figure 5-1. Remote Programming Flowchart (Sheet 1)

70 Remote Operation Figure 5-1. Remote Programming Flowchart (Sheet 2)

72 Remote Operation 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 apulse width of 1 millisecond, and turns on transient operation. When the *TRG command is received, a 1 millisecond p...

Remote Operation 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: S...

Calibration 75 6 Calibration Introduction This chapter describes the calibration procedures for the Agilent 6050A and 6051A Electronic Load mainframe and itsassociated modules. Both "A" modules (Agilent Models 60501A-60504A) and "B" modules (Agilent Models 60501B-60507B) are covered ...

76 Calibration Table 6-1. Equipment Required for Calibration Equipment Characteristics Recommended Model Shunts 0.1 Ω @ 15 A, 0.04% @ 25 W Guildline 9230/15 0.01 Ω @ 100 A, 0.04% @ 100 W Guildline 9230/100 0.001 Ω @ 300 A, 0.04% @ 100 W Guildline 9230/300 Voltmeter dc accuracy of 0.01%, 6 digit read...

Calibration 77 CALibration:SAVE Writes the present calibration constants into the EEprom. This command does not have to be sent until all ranges and modeshave been calibrated. If the unit is turned off before CAL:SAVE is sent, the new calibration constants are lost. Calibration Flowcharts The flowch...

78 Calibration Figure 6-2. Calibration Flowchart for "A" Modules

Calibration 79 Figure 6-2. Calibration Flowchart for "A" Modules (continued)

80 Calibration Figure 6-2. Calibration Flowchart for "A" Modules (continued)

Calibration 81 Program Listing for "A" Modules 10 Load=705 20 Chan= 1 30 OUTPUT Load;"CHAN";Chan;";CAL ON" 40 Cal_curr(Load,Chan,Hi_curr_rng,Hi_curr_hipt,Hi_curr_lopt,l); 50 Cal_curr(Load,Chan,Lo_curr_rngLo_cu,rr_hipt,Lo_curr_lopt,0) 60 Cal_volt(Load,Chan,Volt_hipt,Volt_lopt)...

82 Calibration Program Listing for "A" Modules (continued) 510 PRINT "VOLTAGE CALIBRATION" 520 PRINT "Set power supply according to module calibration table" 530 PRINT "Press CONTINUE when ready" 540 PAUSE 550 OUTPUT Load;"CHAN";Cha n 560 OUTPUT Load;"MODE...

Calibration 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&...

84 Calibration 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 ...

Calibration 85 Figure 6-3. Calibration Flowchart for "B" Modules

86 Calibration Figure 6-3. Calibration Flowchart for "B" Modules (continued)

Calibration 87 Figure 6-3. Calibration Flowchart for "B" Modules (continued)

88 Calibration Program Listing for "B" Modules 10 ASSIGN @Ld TO 705 20 Chan=l 30 OUTPUT @Ld;”CHAN”;Chan;”;CAL ON" 40 Cal_curr(@Ld,Chan,Hi_curr_rng,Hi_curr_offset,l) 50 Cal_curr(@Ld,Chan,Lo_curr_rng,Lo_curr_offset,0) 60 Cal_volt(@Ld,Chan,Volt_hipt,Volt_lopt) 70 Cal_res(@Ld,Chan,Lo_res_rng...

Calibration 89 Program Listing for "B" Modules (continued) 530 OUTPUT @Ld;"*TRG" 540 IF Flag THEN WAIT 30 550 INPUT "Enter current through shunt for high point in amps",Trpt_curr 560 OUTPUT @Ld;"CAL:TLEV";Trpt_curr 570 OUTPUT @Ld;"TRAN OFF" 580 PRINT "Test...

90 Calibration 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 ...

Considerations For Operating In Constant Resistance Mode 91 A Considerations For Operating In Constant ResistanceMode The Agilent Electronic Loads implement Constant Resistance. (CR) mode by using either the CV circuits or CC circuits toregulate the input. The low range is regulated with the CV circ...

92 Considerations For Operating In Constant Resistance Mode 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 practic...

Index 93 INDEX A aliases .......................................................................................................................................................................... 16ampere-capacity .........................................................................................

Agilent Sales and Support Offices 97 Agilent Sales and Support Offices For more information about Agilent Technologies test and measurement products, applications, services, andfor a current sales office listing, visit our web site: http://www.agilent.com/find/tmdir You can also contact one of the f...

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.