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6060A/6063A Operating Guide

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1. 87 hn dre M MM MM EE EM 89 Agilent Sales and Support Offices nnen 93 General Information What s In This Manual This chapter contains specifications that apply to the Single Input Electronic Load Family as well as information concerning options and safety requirements The remaining chapters in this manual contain instructions for installing operating programming and calibrating the Electronic Load as follows Chapter 2 Operation Overview describes all of the Electronic Load s functions and briefly describes how they can be controlled locally at the front panel and or remotely via a GPIB controller Chapter 3 Installation includes turn on checkout procedures as well as controller and application connections Chapter 4 Local Operation describes in detail how to operate the Electronic Load at the front panel Chapter 5 Remote Operation provides an introduction to remote programming Chapter 6 Calibration contains calibration procedures for the Electronic Load and gives sample calibration programs Yearly calibration intervals are recommended Reader Path If you are a first time user start with this manual paying particular attention to Chapter 2 After installation Chapter 3 read Chapter 4 to learn front panel operation Programming users should then read Chapter 5 before going to the Programming Reference Guide Experienced programming us
2. S 55 INPUt on off vesc e BIER Me Sa E sk S EE tere iae nee 31 55 K keypad i eI SN e ERR IEEE S EE E EAEE 51 L LCD display neuem E DER E uiaiia kupas 51 52 T S A DQ 39 ITE dH E 51 Ime Volta Sei i e Ree RSS es eh ios eed DI aea eiu deer 38 sotto ae OE TRU 22 Tocal sense conmnectlons enu eee eee GS u E au test peer e 45 M 24 55 ineas rement i 30 69 ineasurement overload 5 Rete ett IEEE 69 eee tb tp a rie De A eripe s 51 55 transition time crt eco 29 MODES OL operation o e ee u Weil da ee E ERR de EXE Te Ee EE ERE l a asuata 22 inonitor QUtpUts 34 44 N nominal power limit iniit eo PH e arbe ER Ere he ORC shes ore ERREUR e eir 34 nonvolatie memory ated tre oe RR Gane ease RTE gehe dita d edt ide ens 32 90 Index INDEX continued output statement Pam ie TEASE Ueber 67 SERI UU UU T En 33 55 overload conditi
3. ab ea bis shea deo iae UO ER dt detect een 72 change eS Beales ates ee RAE EE RS 37 checko t Dt PEE DUE DRUG ERROR DER DD 38 comp ted c ayaq sas 55 comp ted power Value mig e a p qui pute tp ui eoe n ip quia tere EE re 55 CODHECIOE COVER ies Dou a een Rat rtr TER QU ea co ri dede eee 43 constant current OO GR els hp enitn eoi ERRARE 22 constant resistance CR mode 24 89 constant voltage iode eere hua eec ete A eter aa ua 25 continuous transient operation eren nennen enne S nenne teret entren tren s A 26 73 uyta eerie i hene nbn tubo euis De e LA ed Leo as 34 43 o T D 21 38 CR mode example o ose Ue tH E EM petu UI egre eei mp idee 72 CV mode example o eode eue n edad te e quee 72 D ROI 62 enteristatement s RR ERI sua e ee 67 Error e Een 64 extended a sunsu aha ete eR E uet tun tempe teta tei ir RS 35 extended power operation ete EE teks usaha rete s
4. 44 Parallel ConnectIonS tet Gee rr e ERR REED Er FETT soap rr e TOSE 45 Zero V Olt Loading Connections us nunapa ose on Ule ec tl iret eS 45 4 Local Operation Introduction nene Dum RU avn yaa I sa 49 Local Control Overview L uu uapa ie cue edite ee ti deer eei e ere piede s 52 Using The Function Keys ete terre Re I e EORR ERE E ep EE bere eR ETE 53 Turning the Input On OIT ce ee ve e euet ep ee Peters 53 Setting the Mode of Operation ice eicere te estre irr t erri te btt i EE EE ee Darko 55 Setting CC Vales u s saus poto meat e te aD d e nde 55 Setting CR tete tont ete ede ire oe aeter tec 57 Setting CV Values oet ede eren eh eee a ee a et 59 Transient Operation eene uheponen e ttum the p RI pee Deut 60 Shorting the Input E o pore ther ne i ee He RR rere rep pt e e pret 61 Resetting Latched Protection eet nia ett oan e iR e 61 Using The System oco ee ORBI OH RO ERI MEE nee 61 Setting the GPIB Addr s8 rer ate cr re tree re TREE CER e le DUE Reid 62 Displaying Error oto eee foede eibi ts d Gert vien euis 62 Saving and Recalling Settings enne tentent trennen enne tene trennen 62 Changing Wake up Settings eneenneneee trennen enne 63 Recalling the Factory
5. Enter 4 Observe that the Electronic Load is drawing 5 A and is operating in CC mode The power supply should be operating in CV mode The Electronic Load front panel display should appear about the same as the one shown in Figure 3 6 VOLTS AMPS CC CR CV Tran Unr Prof Err Shift Rmt SRQ Figure 3 6 Power Test Display 5 Depress the key Observe that the Electronic Load front panel display indicates about 50 W 7 Turn off the Electronic Load disconnect the power supply and continue with the rear panel connections a Controller Connection GPIB Connector The GPIB connector on the rear panel connects the Electronic Load to the controller and to other GPIB devices A GPIB system can be connected in any configuration star linear or both as long as e total number of devices including the controller is no more than 15 The total length of all cables is no more than 2 meters times the number of devices connected together up to a maximum of 20 meters Note IEEE Std 488 1978 states that you should exercise caution if an individual cable length exceeds 4 meters Installation 39 Do not stack more than three connector blocks together on any GPIB connector The resultant leverage can exert excessive force on the mounting panels Make sure that all connectors are fully seated and that the lock screws are firmly hand tightened Use a screwdriver only for the removal of the screws GPIB Address The GPIB a
6. Accuracy CURRENT READBACK Accuracy after 30 second wait VOLTAGE READBACK Accuracy POWER READBACK Accuracy PARD 20 Hz to 10 MHz noise Current Voltage 12 General Information 0to6A 0 to 60 A 0 1 80mA 0 1 350 mA 6060B 0 033 to 1 Q 1 to 1000 Q 10 to 10 000 Q 0 8 10 m Q with 2 6 A at input 0 3 10 mS with 2 6 V at input 0 3 10 mS with 2 6 V at input 0 to 60 V 0 1 300 mV 0 05 65 mA 0 05 45 mV 0 2 4 W 4 mA rms 40 mA p p 6 mV rms OtolA Oto 10A 0 18 13 mA 0 18 50 mA 6063B 0 20 to 24 Q 24 to 10 000 Q 240 to 50 000 Q 0 8 200m Q with 2 1 A at input 0 3 0 5 mS with 2 24 V at input 0 3 0 4 mS with 2 24 V at input 0 to 240 V 0 15 41 1V 0 12 10mA 0 1 150 mV 0 2 3 W 1 mA rms 10 mA 6 mV rms Table 1 2 Supplemental Characteristics CONSTANT CURRENT MODE Resolution Low Range High Range Temperature Coefficient CONSTANT RESISTANCE MODE Resolution Low Range Middle Range High Range Temperature Coefficient Low Range Middle and High Ranges CONSTANT VOLTAGE MODE Resolution Temperature Coefficient TRANSIENT OPERATION Continuous Mode Freq Resolution Duty Cycle Resolution TRANSIENT CURRENT LEVEL Resolution Low Range High Range Temperature Coefficient TRANSIENT RESISTANCE LEVEL Resolution Low Range Middle Range High Ran
7. Installation 47 Local Operation Introduction The Operation Overview chapter introduced you to the Electronic Load s features and capabilities and briefly described how to control the unit locally from the front panel and remotely with a computer via the GPIB This chapter describes in greater detail how to operate the Electronic Load from the front panel The following discussions are provided Front Panel Controls and Indicators Local Control Overview Using the FUNCTION Keys Using the SYSTEM Keys The Electronic Load can be programmed locally using the controls and indicators on the front panel As shown in Figure 4 1 the front panel s controls and indicators include a 12 segment LCD display and a keypad having three groups of keys SYSTEM FUNCTION and ENTRY Table 4 1 gives a brief description of each control and indicator amen eA 1887 SYSTEN OC ELEC TAC 1040 Figure 4 1 Front Panel Table 4 1 Controls and Indicators Item Description 1 Line Switch Turns the ac power on and off 2 LCD Display Normally displays the actual voltage and current at that input e g 10 09 and 0 99 respectively When programmed from the front panel the function being programmed is displayed along with the value e g CURR 1 000 Local Operation 49 Table 4 1 Controls and Indicators continued Item 3 Electronic Load Status Annunicators 4 GPIB Status Annunicators Description CC Indicates the Ele
8. 1430 1440 1450 SUB Cal res GLd Chan Res rng Res hipt Res lopt Flag PRINT RESISTANCE CALIBRATION RANGE Res rng PRINT Set power supply to calibration information table PRINT Press CONT when ready to continue PAUSE OUTPUT Ld CHAN Chan OUTPUT Ld MODE RES OUTPUT GLd RES RANG Res rng OUTPUT Ld RES Res_hipt INPUT Enter voltage across input terminals in volts Hipt volt INPUT Enter current through current shunt in amps Hipt curr Hipt volt Hipt curr OUTPUT Ld CAL LEV HIGH Hipt_res OUTPUT Ld RES Res_lopt INPUT Enter voltage across input terminals in volts Lopt volt INPUT Enter current through current shunt in amps Lopt curr Lopt_res Lopt_volt Lopt_curr OUTPUT Ld CAL LEV LOW Lopt_res PRINT Test unit to verify resistance values PRINT Press CONT when ready to calibrate transient level PAUSE IF Flag THEN OUTPUT Ld RES Res_hipt ELSE OUTPUT Ld RES Res_lopt END IF OUTPUT Ld TRAN STAT ON MODE TOGG TRIG SOUR BUS IF Flag THEN OUTPUT Ld RES TLEV Res_lopt ELSE OUTPUT Ld RES TLEV Res_hipt END IF OUTPUT Ld TRG INPUT Enter voltage across input terminals in volts Tran volt INPUT Enter current through current shunt in amps Tran_curr Tran_res Tran_volt Tran_curr OUTPUT Ld CAL TLEV Tran_res OUTPUT Ld TRAN OFF PRINT Test unit to verify transient values are in spec PRINT Press CONT when ready to end program or calibrate next range PAUSE SUB
9. CURR 10 000 main level is 10 A C TLV 12 000 transient level is 12 A C SLW 5 0000 slew rate is 5 A Us If you now select the 0 to 6 A range C RNG 6 0000 the settings will automatically change to the following CURR 6 0000 main level is 6 A C TLV 6 0000 transient level is 6 A C SLW 50000 slew rate is 0 5 A us Examples The following examples illustrate how to set CC values Before you do these examples press to set the CC values to their factory default states see Table 4 6 1 Set Range a Press CURRto select the CC function Now press to determine the range setting Note that the display indicates C RNG and the maximum high range CC value This means that the high range is selected b Select the low range by pressing Press and check that the display indicates C RNG and the maximum low range CC value This means that the low range is selected 2 Set Main Level a Press and note that the display indicates CURR and the minimum low range CC value b Set the main current level to 0 5 amps by pressing CURR L 5 c Press CURR again and check that the display indicates CURR 0 5000 Note that you can use the ENTRY keys to increment A or decrement W the main level CURR setting You can see the CURR setting being incremented or decremented one step at a time each time you press the applicable Input key The values are entered automatically you don t press the Enter key R
10. Consistent with good engineering practice all leads connected to the trigger connector should be twisted and shielded to maintain the instrument s specified performance TB201 8 E 1234 RTB2 HP P N 1252 1488 1 COM TRG N Figure 3 10 Trigger Connector TRIG IN pin 1 A TTL compatible input that responds to low level external trigger signals A trigger applied to this input can be used to change settings voltage current resistance etc toggle between settings in transient toggle mode or generate a pulse in transient pulse mode TRIG OUT pin 2 A TTL compatible output signal that becomes active low level whenever the load is triggered with a GPIB command or TRIG IN signal This signal can be used to trigger external equipment such as oscilloscopes digitizers or another load Common Provides the common connection for the trigger signals pins 3 and 4 Sense Switch Unless you are using remote sensing make sure that the sense switch is set to Local Remote sensing is used in certain applications to achieve greater accuracy refer to Remote Sense Connections for more information Note If the sense switch is set to remote operation without having sense leads connected to the sense inputs the unit will continue to work in CC mode but the input will turn off in CV and CR mode Voltage readback will not work in any mode Installation 43 Application Connections Wiring Considerat
11. Ld CAL MEAS HIGH Lopt_curr ELSE OUTPUT Ld CURR 10 Curr_rng 3750 INPUT Enter current through shunt for low point in amps Lopt_curr OUTPUT GLd CAL LEV LOW Lopt curr Curr offset END IF PRINT Test unit to verify that program and readback values are in spec PRINT Press CONT when ready to calibrate transient levels PAUSE OUTPUT GLd CURR 05 Curr rng OUTPUT Ld TRAN STAT ON MODE TOGG TRIG SOUR BUS OUTPUT GLd CURR TLEV 85 Curr rng 82 Calibration Program Listing continued 520 530 540 550 560 570 580 590 600 610 620 630 640 650 660 670 680 690 700 710 720 730 740 750 760 770 780 790 800 810 820 830 840 850 860 870 880 890 900 910 920 930 940 950 960 970 980 990 1000 1010 1020 OUTPUT Ld TRG IF Flag THEN WAIT 30 INPUT Enter current through shunt for high point in amps Trpt curr OUTPUT GLd 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 GLd Chan Volt hipt Volt lopt PRINT VOLTAGE CALIBRATION PRINT Set power supply according to calibration information table PRINT Press CONT when ready PAUSE OUTPUT Ld CHAN Chan OUTPUT Ld MODE VOLT OUTPUT Ld VOLT 05 Volt_hipt WAIT 3 INPUT Enter voltage across input terminals for low point in volts Lopt v OUTPUT GLd
12. Malaysia Sdn Bhd 550 Clark Drive Suite 101 Malaysia Manufacturing Budd Lake New Jersey 07828 Bayan Lepas Free Industrial Zone PH III USA 11900 Penang Malaysia Declares under sole responsibility that the product as originally delivered Product Names Single input dc Electronic Loads Model Numbers 6060B 6063B and other customized products based upon the above Product Options This declaration covers all options and customized products based on the above products Complies with the essential requirements of the Low Voltage Directive 73 23 EEC and the EMC Directive 89 336 EEC including 93 68 EEC and carries the CE Marking accordingly EMC Information ISM Group 1 Class A Emissions As detailed in Electromagnetic Compatibility EMC Certificate of Conformance Number CC TCF 00 080 based on Technical Construction File TCF HPNJ7 dated Oct 29 1997 Assessed by Celestica Ltd Appointed Competent Body Westfields House West Avenue Kidsgrove Stoke on Trent Straffordshire ST7 1TL United Kingdom Safety Information and Conforms to the following safety standards IEC 61010 1 2001 EN 61010 1 2001 UL 1244 CSA C22 2 No 1010 1 1992 This DoC applies to above listed products placed on the EU market after January 1 2004 Date Bill Darcy Regulations Manager For further information please contact your local Agilent Technologies sales office agent or distributor Authorized EU representative Agilent Technologies Deutschlan
13. Q 1 5 123 0 98 0 82 0 75 26 7 37 1 9 0 9 10 6 047 0 37 0 31 18 6 388 15 5 1075 G5 5 20 1 57 1 30 1 20 0 50 2 5 13 08 0 63 0 50 0 42 16 4 018 24 5 a 4 3 1 2 49 2 07 1 5 13 7 73 3 6 1 8 12 0 91 0 73 0 61 14 2 526 39 5 19 5 09 5 65 4 9 3 46 3 30 2 5 8 21 122 61 30 20 1 52 1 22 1 01 12 1 589 62 5 31 15 5 10 5 7 9 6 29 5 24 4 5 09 19 6 9 8 4 9 33 2 46 1 96 1 64 10 0 9994 100 50 Q5 lan 2 5 10 00 8 34 6 3 39 29 147 74 49 3 69 2 95 2 96 8 0 6285 159 79 695 27 199 15 91 1325 10 1 95 51 25 128 85 641 5 13 4 27 6 0 3953 252 126 63 40 31 6 25 30 21 07 16 1 24 80 40 20 13 4 10 08 8 06 6 72 4 0 2486 402 201 100 1 68 50 37 40 23 33 51 Installation 45 DC POWER SUPPLY SOURCE SENSE SWITCH SET TO LCL POSITION Figure 3 11 Local Sensing DC POWER SUPPLY CC SOURCE OUTPUT TIE wRAPS CV OR CR MOOE SENSE SWITCH SET TO RMT POSITION Figure 3 12 Remote Sensing 46 Installation DC POWER SUPPLY CV SOURCE OUTPUT CC OR CR MODE LOAD 2 TO PIN 3 Figure 3 13 Parallel Operation CURRENT FLOW OEVICE UNDER TEST OC VOLTAGE SOURCE f SENSE SWITCH SET TO RMT POSITION Figure 3 14 Zero Volt Loading
14. Short on off Toggles the short circuit mode and off Short On applies a short circuit across the Electronic Load input Short Off removes the short circuit and returns the Electronic Load to the original settings Tran On Off Toggles transient operation on and off The Tran annunciator is on while transient operation is on Transient operation causes the Electronic Load input to periodically switch between two levels Displays the transient level for current C TLV resistance R TLV or voltage V TLV depending upon which function is selected This level can be changed using the ENTRY keys The input alternates between the transient level TLV and the main level of the active mode CURR RES or VOLT when transient operation is turned on shifted Tran Level key Displays the slew setting for current C SLW or voltage V SLW depending upon which function is selected The settings can be changed using the ENTRY keys The slew settings determine the rates at which new programmed values will change Note that resistance changes use the voltage or current slew rate settings depending upon the resistance range Displays the frequency setting of the transient generator e g FREQ 1000 The setting can be changed using the ENTRY keys The Freq setting determines the frequency in continuous transient operation shifted Freq key Displays the duty cycle of the transient generator e g DCYCLE 50 0 The setting can be change
15. 3 3 Voltage Select Switches INSERT SCREWORIVER TO PRY COVER OFF SPARE FUSE Figure 3 4 Line Fuse Installation 37 Connect The Power Cord Your Agilent Electronic Load was shipped with a power cord for the type of outlet used at your location Connect the power cord to the ac input socket SHOCK HAZARD The power cord provides a chassis ground through a third conductor Be certain WARNING that your power outlet is of the three conductor type with the correct pin connected to earth ground see Figure 3 1 Turn On Selftest Turn on the Electronic Load using the LINE switch on the front panel and observe the display Immediately after turn on the Electronic Load undergoes a selftest that checks the GPIB interface circuitry as well as the input circuitry of the unit All of the front panel LCD segments are momentarily activated When selftest completes the display should appear about the same as the one shown in Figure 3 5 with the CC annunciator being on VOLTS AMPS v CC CR CV Tran Unr Prot Err Shift Rmt Addr SRQ Figure 3 5 Front Panel Display After the Electronic Load has passed selftest connect a power supply to the Electronic Load to test the input circuits as described under Power Test If the unit fails any portion of the selftest one of the following error numbers may briefly appear on the display GPIB Errors Input Errors Display Description Display Description ERROR 4 GPIB failur
16. CAL LEV LOW Lopt volts OUTPUT GLd CAL MEAS LOW Lopt volts OUTPUT Ld VOLT 85 Volt_hipt WAIT 3 INPUT Enter voltage across input terminals for high point in volts Hipt_ OUTPUT Ld CAL LEV HIGH Hipt_volts OUTPUT GLd CAL MEAS HIGH Hipt volts OUTPUT Ld VOLT Volt_lopt WAIT 3 INPUT Enter voltage across input terminals for low point in volts Lopt v OUTPUT GLd CAL LEV LOW Lopt volts OUTPUT GLd CAL MEAS LOW Lopt volts OUTPUT Ld VOLT Volt_hipt WAIT 3 INPUT Enter voltage across input terminals for high point in volts Hipt OUTPUT GLd CAL LEV HIGH Hipt volts OUTPUT GLd CAL MEAS HIGH Hipt volts PRINT Test unit to verify that program and readback values are in spec PRINT Press CONT when ready to calibrate transient level PAUSE OUTPUT Ld VOLT Volt_lopt OUTPUT Ld TRAN STAT ON MODE TOGG TRIG SOUR BUS OUTPUT Ld VOLT TLEV Volt_hipt OUTPUT Ld TRG INPUT Enter voltage across input terminals for transient point in volts OUTPUT Ld CAL TLEV Trpt_volts OUTPUT Ld TRAN OFF PRINT test unit to verify that transient values are in spec PRINT Press CONT when ready to calibrate next mode PAUSE SUBEND Calibration 83 Program Listing continued 1030 1040 1050 1060 1070 1080 1090 1100 1110 1120 1130 1140 1150 1160 1170 1180 1190 1200 1210 1220 1230 1240 1250 1260 1270 1280 1290 1300 1310 1320 1330 1340 1350 1360 1370 1380 1390 1400 1410 1420
17. CC Values 60 Local Operation a Set main CC level to 0 5 amps the transient CC level to 1 amp and the slew rate to 0 0025 See examples under Setting CC Values b Turn on CC mode by pressing CURR 2 Set frequency to 5 kHz by pressing FEQ 5 0 0 0 Enter 3 Set duty cycle to 25 by pressing blue shift key shifted 2 5 4 Turn on transient operation by pressing Iran On Off 5 Note that the Tran annunciator is on Shorting The Input The Electronic Load can simulate a short circuit across its input The short circuit can be toggled on off by pressing Short onloff When the input is shorted the message SHORT ON win be displayed The short on off change uses the slew rate setting of the active mode and range Turning the short off returns the input to the previously programmed values and returns the display to the metering mode Note that INPUT OFF takes precedence over SHORT ON CAUTION 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 Resetting Latched Protection The Electronic Load includes overvoltage OV overpower OP and overtemperature OT protection features as well as a software overcurrent limit protection feature remotely programmable only that latch when they are trippe
18. Pulse width 0 5 ms 0 5 ms output signal TTL logic 0 TTL logic 0 Calibration mode off off Trigger source hold hold Can only be programmed remotely via the GPIB Continuous transient operation is the only mode of transient operation available at the front panel Pulsed toggled and continuous transient operating modes may be programmed remotely via the GPIB Changing Wake up Settings The wake up settings are stored in register 0 At power on the Electronic Load will wake up with these values set When the Electronic Load is shipped from the factory its wake up values are the same as its factory default values see Table 4 6 You can change the wake up values to whatever values you wish You do this by setting them into the Electronic Load and then saving them in register 0 by pressing blue shift key shifted Recall key 0 Enter When power is turned off and on the Electronic Load will be set to the values you saved in register 0 The Save 0 operation takes a few seconds to complete Do not turn power off until the SAVE 0 CAUTION message goes away indicating that the operation is complete If you turn off power before completion the Electronic Load s non volatile memory will be corrupted and the Electronic Load will need to be recalibrated Local Operation 63 Recalling the Factory Default Values You can recall the factory default values see Table 4 6 for all modules by pres
19. actual resistance will be 1 S 0 008 S 1 008 S to 0 992 S 0 992 Q to 1 008 Q If 1 kilohm is programmed the corresponding conductance value is 0 001 siemens The actual resistance will be 0 001 S 0 008 S 0 009 S to 0 007 S 111 Q to infinite Q typically 900 to 1100 Q The load cannot provide negative current corresponding to negative siemens Therefore zero current translates to zero siemens which corresponds to infinite ohms Note also that the resistance can be as low as 111 ohms which is much lower than 1 kilohm This is because the current offset is large compared to the small current corresponding to 1 kilohm 0 001 siemens For instance 0 001 siemens corresponds to 6 milliamps at 6 volts input and the offset specification of 0 008 siemens corresponds to 48 milliamps at 6 volts input Calculations for the 10 kilohm range are similar 88 Considerations For Operating In Constant Resistance Mode A ALIASES 2s pe de o WR PET OP D RR pr te D RAE vet 21 5 ien aC UR D gerer ER icon ute inni petas i ven m cR ordered 46 EE 52 application Connections a epee pee Ricco ee tes ag eb ect spa 45 B DINING POSES Re M 42 calibration commands sedan uae meo hi 78 calibration SQuIPINENLE ER TI Calibration example s dienen tein etate en Salat eta etre iR RS 79
20. as you turn the input on Some programming examples are given in subsequent paragraphs If you program a value outside the valid range it will be ignored and the display will read OUT OF RANGE Note In the programming examples that follow it is assumed that a dc source is connected to the Electronic Load s INPUT binding posts Turning the Input On Off The input can be toggled on and off by pressing Input on off When the input is turned off the message INPUT OFF will be displayed The input on off change does not use any slew setting so the input will change at the maximum rate Turning the input off does not change the programmed settings Turning the input on again restores the input to the programmed values and returns the display to the metering mode Local Operation 53 Note The CC CR and CV values described in subsequent paragraphs can be programmed whether or not the associated mode is active When a mode is selected all of the associated values will take effect at the input provided that the input is turned on Figure 4 2 Recommended Programming Sequence 54 Local Operation Setting the Mode of Operation The present active mode of operation is indicated by the appropriate annunciator being on e g CC The active mode can also be viewed on the display by pressing MODE For example MODE CURR indicates that the CC mode is active You can change the mode to CR or CV by pressing the applicable
21. condition does not cause the input to be turned off However a Fault signal output at the rear panel control connector will indicate when either an overvoltage condition or a reverse voltage condition has occurred 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 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 Overcurrent The Electronic Load includes both hardware and software overcurrent protection features Hardware When operating in the CR or CV mode it is possible for a load to attempt to sink more current than it is rated for Under this condition the load current will be limited by a current limit circuit which is set at a value slightly above the current rating It protects both the Electronic Load and the device under test from operating too far beyond specified limits The hardware current limit circuit does not turn the load s input off The overcurrent OC bit in the status register is set when an OC condition occurs and is reset when the OC condition is removed Software In addition to the hardware overcurrent protection circuit the Electronic Load allows the user to define a current protection limit in software which will shut down the input if the lim
22. current voltage resistance slew transient level etc for various tests can be stored Saving settings and recalling them later saves programming time The present settings are saved in the specified register 0 to 6 at the front panel key or via the GPIB SAV command All of the settings are saved in the specified location in the load s memory Settings saved in locations 1 through 6 will be lost when ac line power is cycled However the SAV 0 command will cause the settings to be stored in non volatile memory and the next time the Electronic Load is turned on these settings will become the power on settings You can recall the saved settings from the specified register 0 to 6 at the front panel key or via the GPIB RCL command All of the parameters that were saved by the SAV command are set to the saved values At power on the Electronic Load automatically executes a RCL 0 which recalls the values saved in nonvolatile memory You can recall the factory default settings at the front panel Recall or via the GPIB RST command Reading Remote Programming Errors Remote programming errors can be read via the GPIB SYST ERR query or at the front panel key The Err annunciator indicates when remote programming errors have occurred The errors are negative numbers grouped into blocks of 100 as follows lxx Command errors 2xx Execution errors 3xx Device specific errors Axx Query errors The SYST ERR query o
23. indicates the zero to full scale current or voltage Pin 3 monitors current IM pin 4 monitors voltage VM Provides the common connection for the IM VM and external programming Ext Prg signals This common point is floating from ground at the potential of the INPUT terminal Connects an external programming input The CC and CV mode can be programmed with a 0 V to 10 V signal ac or dc This signal can act alone or can be summed with values programmed over the GPIB Thus it is possible to have an ac signal applied at pin 6 upon a programmed dc level Not used A TTL compatible output signal that becomes active high level when an overvoltage or a reverse voltage condition occurs This signal powers up in the inactive low level state A TTL compatible output signal that becomes active high level when the PORTO command is programmed ON This signal can be used to control an external device such as a relay for shorting the Electronic Load s input terminals or as a general purpose digital output port This signal powers up in the inactive low level state Provides the common connection for Flt and Port signals Replace the mating plug in the connector after you have finished making all wire connections Replace the safety cover 42 Installation Trigger Connector A four pin connector block TB201 connector and a quick disconnect mating plug RTB2 are provided for input and output trigger signals see Figure 3 10
24. is then programmed the current setting will automatically be changed to 6 A see Chapter 4 20 Operation Overview LOAD 2 CURRENT V INPUT VOLTAGE Figure 2 1 Constant Current Mode Immediate Current Level The current level can be set at the front panel ENTRY keys via the GPIB CURR command If the CC mode is the active mode the new setting immediately changes the input at a rate determined by the slew setting described below If the load is not in the CC mode the new setting is saved for use when the mode is changed to CC Triggered Current Level The current level can be preset stored in the Electronic Load allowing the input to be updated when a trigger is received instead of immediately as previously described The current level can only be preset via the GPIB CURR TRIG command The preset capability is not available at the front panel If the CC mode is the active mode the preset current level will become the actual value and the input will be updated when a trigger occurs If the CC mode is not the active mode the preset current level will become the actual value when a trigger occurs but there will be no effect on the input until the CC mode becomes active Once a level is triggered subsequent triggers will have no effect on the input unless another CURR TRIG command is sent The trigger sources available to the Electronic Load are described later in this chapter The Electroni
25. 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 A programmable slew rate allows a controlled transition from one load setting to another to minimize induced voltage drops on inductive power wiring or to control induced transients on a test device such as would occur during power supply transient response testing Operation Overview 27 In cases where the transition from one setting to another is large the actual transition time can be calculated by dividing the voltage or current transition by the slew rate The actual transition time is defined as the time required for the input to change from 10 to 90 or from 90 to 10 of the programmed excursion In cases where the transition from one setting to another is small the small signal bandwidth of the load limits the minimum transition time for all programmable slew rates Because of this limitation the actual transition time is longer than the expected time based on the slew rate as shown in Figure 2 7 E a v 5 8 2 52 c z 1 E xpec ed Time 2 me imcrosecondsi Actual Te t Figure 2 7 Risetime Transition Limitation Therefore both minimum transition time and slew rate must be considered when determining the actual transit
26. time is based on low capacitance current source Resistance Slew Rate Low Range Uses the value programmed for the voltage slew rate Middle and High Ranges Uses the value programmed for the current slew rate 6063B 0 to 240V TRANSIENT CURRENT OVERSHOOT When programmed from 0A Model 6060B Range Transient Current Level 60A 6 60 A 3A 3A 6A 6A 3A 3A Model 6063B Range Transient Current Level 10A 2 10 A 0 5 A 0 5 A 1A 1A 1A 0 5 A 0 5 A 1A Current Slew Rate All slew rates I A us to 5 A us I A ms to 0 5 A us All slew rates 0 25 A us and 0 5 A us 0 1 A ms to 0 1 A us Current Slew Rate All slew rates 0 17 A us to 0 83 A us 0 17 A ms to 42 A ms 0 83 A us 0 17 A ms to 0 17 A us 83 A ms 17 A s to 17 A ms All slew rates Transition Time 8 0 ms 3 2 ms 1 6 ms 800 us 320 us 160 us 100 us 100 us 100 us Overshoot 0 1 0 0 1 0 Overshoot 0 5 0 1 0 4 0 0 All overshoot values assume a total inductance of 1 uH or less in the load leads connected to the D U T For Model 6060B overshoot may be higher during first five seconds of programming if the unit has been operating at full current 16 General Information Table 1 2 Supplemental Characteristics continued SOURCE TURN ON CURRENT OVERSHOOT In CC and CR modes when connected to power supplies with voltage rise times of greater than 500 48 6060B 6063B 1096 596 PROGRAMMABLE SHORT CIRCUIT 0 033 ohm 0 02 o
27. 0 04 100 W Guildline 9230 100 Voltmeter dc accuracy of 0 01 6 digit readout Agilent 3456A or equivalent Power Supply 240 Vdc 60 Adc minimum Agilent 6032A or Agilent 6035A and PARD 3 mV rms 30 mv pp Agilent 6031A or equivalent Controller GPIB IEEE 488 Agilent BASIC 5 0 5 1 Calibration 75 POWER SUPPLY GPIB CONTROLLER Figure 6 1 Calibration Equipment Setup Calibration Commands The following calibration commands are required to calibrate the Electronic Load They are used in the program examples included in this section Refer to the Agilent Electronic Loads Programming Reference Guide for HPSL commands CALibration MODE ONIOFFI Turns the calibration mode on or off CALibration LEVel HIGH lt NRf gt Enters the actual high level value measured by an external instrument that corresponds to the present high level setting An error is generated if the high level value is not greater than the low level value Both high and low CAL LEV commands must be sent before the constants are recalculated and stored in RAM CALibration LEVel LOW lt NRf gt Enters the actual low level value measured by an external instrument that corresponds to the present low level setting An error is generated if the low level value is not less than the high level value Both high and low CAL LEV commands must be sent before the constants are recalculated and stored in RAM CALibration TLEVel HIGH lt gt Ente
28. 2 00 Dien e emp 64 5 Remote Operation Introduction ire pier P eet pe RP FE t Ot P EE OPERAR ette pe reete 65 Enter Output 5 su un a usnu am S iter ten Si YS Ug lere d eite tut 65 sopi pss 65 Sending A Remote Command enne 66 Getting Data Back From The Electronic Load 66 Remote Programming Commands u cece eese eene nne enne enne entente nennen 66 CC Mode Example ite Ree Uo RN ee im e eite pU eren 70 CV Mode Example a cei ERU ro EE E EUER Ee eee Een Eee eee ete 70 CR Mode Example etate cie CORR Red Dep Pp E DOR E erp 70 Continuous Transient Operation Example sese nennen rennen 71 Pulsed Transient Operation Example ssesseseseseeeseeeeeee eene nennen 71 6 Calibration Introd ction csse 75 Example Programs eioen oei ots t EREMO EEE EE E EO In qe bec eter Ee 75 Equipment Required oerte e et E S o AE EE ot ee Usa G 75 Table of Contents continued Calibration Cominands L D Reduce A eet ite HE 76 Calibration Flowch rts ua eiecit cite dbec ii dee eue ee cp e beet TI Example PrfOSEatn s oU Sunan E A aequ bue EU du eee eene TI A Considerations for Operating in Constant Resistance Mode
29. 2 steps that is closest to the programmed value In the low range the CR slew rate is programmed in volts second instead of ohms second Whatever value is programmed for the CV slew rate is also used for CR In the middle and high ranges the CR slew rate is programmed in amps second Whatever value is programmed for the CC slew rate is also used for CR Programmable Current Protection CURR PROT The programmable current limit is in effect for any mode of operation not just the CC mode When programmable current protection is enabled and the programmed current limit and time delay are exceeded the module s input will be turned off Measurement Overload OVLD If the input voltage exceeds the maximum measurement capability of the load an overload OVLD condition will be indicated in the return values that resulted from a MEAS VOLT or MEAS POW query sent to the associated channel The MEAS POW query will return an overload indication if either voltage or current has exceeded the module s maximum measurement capability since power is calculated from voltage and current Overload is 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 Remote Operation 67 SET INPUT OFF INP OFF SET MODE MODE CURR RES VOLT THE LOW RESISTANCE RANGE USES THE VOLTAGE SLEW SETTING THE MIDDLE AND HIGH RESISTANCE RANGES USE THE SEN RATE SETTING FOR CUR
30. 27779 Type Test Printing History The current edition of this guide is indicated below Reprints of this guide containing minor corrections and updates may have the same printing date New editions are identified by a new printing date and in some cases by a new part number A new edition incorporates all new or corrected material since the previous edition Changes to the guide occurring between editions are covered by change sheets shipped with the guide Also if the serial number prefix of your power module is higher than those listed on the title page of this guide then it may or may not include a change sheet That is because even though the higher serial prefix indicates a design change that change may not affect the content of the guide Edition 1 May 1991 Copyright 1993 Agilent Technologies Inc Edition 2 May 1993 TER November 1997 D April 2000 September 2004 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 Agilent Technologies DECLARATION OF CONFORMITY According to ISO IEC Guide 22 CEN CENELEC EN 45014 Manufacturer s Name and Address Responsible Party Alternate Manufacturing Site Agilent Technologies Inc Agilent Technologies
31. AL MEAS LOW lt NRf gt Figure 6 2 80 Calibration EE TORES CAL N pneu QUE Calibration Flowchart continued LOW RANGE Y Y FROM VOLT CAL EROR Y SELECT RESISTANCE MODE MODE RES Y lt SELECT LOW MIDDLE OR HIGH RANGE RES RANG lt Lo_res_rng gt OR RES RANG Mid res rng OR RES RANG Hi res rng SEE TABLE 6 2 Y SET DC POWER SUPPLY AND CONNECT SHUNT FOR LOW MIDDLE OR HIGH RANGE CAL SEE TABLE 6 2 Y SET HIGH CAL POINT FOR LOW MIDDLE OR HIGH RANGE RES Lo res OR RES Mid res OR RES Hi res hipt SEE TABLE 6 2 MIDDLE OR HIGH RANGE CHECK THAT THE POWER SUPPLY IS IN CC MODE CHECK THAT SUPPLY IS IN C HE POWER V MODE DIVIDE VOLTAGE MEASURED AT LOAD INPUT BY THE CURRENT MEASURED ACROSS THE SHUNT ENTER THE VALUE IN OHMS CAL LEV HIGH lt NRf gt Y SET LOW CAL POINT FOR LOW MIDDLE OR HIGH RANGE RES Lo res OR RES Mid res OR RES Hi res hipt SEE TABLE 6 2 Y DIVIDE VOLTAGE MEASURED AT LOAD INPUT BY THE CURRENT MEASURED ACROSS THE SHUNT ENTER THE VALUE IN OHMS CAL LEV LOW lt NRf gt Y VERIFY THAT CR MODE RESISTANCE PROGRAMMING IS WITHIN SPEC MIDDLE OR 022 TURN TOGGLE MODE TRAN MODE TOGG SET TRIGGER SOURCE
32. As in pulsed transient operation the trigger signal can be an external trigger signal the GPIB GET function the TRG command or the TRIG command Note that toggled transient operation can only be programmed via the GPIB TRAN TOGG command it cannot be programmed at the front panel In this example assume that the CC mode is active the slew rate is at the factory default setting maximum rate an external trigger input signal is connected to the Electronic Load s rear panel and the applicable transient operation parameters have been set as follows HPSL Command Description TRIG SOUR EXT Selects the external trigger input source TRAN MODE 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 26 Operation Overview Figure 2 6 shows the waveform that would result for this toggled transient operation example Operation is similar to that described for continuous and pulse operation except that each time a trigger is received the input alternates between the main and transient current levels TRIG TRIG NOTE 1 us TRIG DELAY Figure 2 6 Toggled Transient Operation Triggered Operation The Electronic Load has various triggering modes to allow synchronization with other test equipment or events As described previously triggering can be used for the following applications Triggering a preset level Transfers
33. C SLW value Low Range High Range Set Transient Level Tran Level C TLV value Low Range High Range Notes Operation Overview in this manual 6060B 20and lt 6 6and lt 60 0 0000 to 6 0000 0 000 to 60 000 see Note 1 0 00010 to 0 5000 A us 0 0010 to 5 000 A us see Note 2 0 0000 to 6 0000 0 000 to 60 000 1 There are 12 discrete steps within a CC slew range low or high The 12 slew rate steps for each range are listed in Table 1 1 Any slew rate can be programmed there are no upper and lower limits that would cause an error The Electronic Load automatically selects one of the 12 slew rates that is closest to the programmed value See Chapter 2 2 The transient current level is meaningful only if transient operation is turned on The transient current level must be set to a higher level than the main current level See Transient Operation later in this Chapter 6063B gt Oand lt 1 gt 1 and lt 10 0 0000 to 1 0000 0 000 to 10 000 0 000017 to 0 083 0 00017 to 0 83 0 0000 to 1 0000 0 000 to 10 000 Local Operation 55 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 6060B 300 Watt Electronic Load the present range is 0 to 60 C RNG 60 000 and the present CC settings are
34. END 84 Calibration Explanation LINE 10 20 LINE 30 LINE 40 90 LINE 100 LINE 110 LINE 140 LINE 200 220 LINE 230 LINE 240 LINE 260 LINE 270 LINE 280 LINE 300 LINE 310 LINE 350 LINE 360 370 LINE 380 390 LINE 400 LINE 410 LINE 430 LINE 440 LINE 500 LINE 550 560 LINE 570 LINE 590 LINE 600 LINE 610 LINE 630 LINE 640 LINE 680 LINE 690 700 LINE 710 720 LINE 730 LINE 750 LINE 760 LINE 820 LINE 870 890 LINE 900 LINE 930 940 LINE 950 LINE 980 990 LINE 1030 1070 LINE 1080 1090 LINE 1100 LINE 1110 1150 LINE 1160 LINE 1190 1200 LINE 1210 Specify select code address and channel default 705 1 Turn calibration mode on Assign variables for subprograms see module calibration tables Store new constants in EEROM when calibration complete Turn calibration mode off Current calibration subroutine Select channel current mode and range Set high calibration point If high current range wait for internal current shunt to stabilize Send measurement in amperes for high main calibration point If high current range send measurement in amperes for high readback cal point Set low calibration point Send measurement in amperes for low main calibration point If high current range send measurement in amperes for low readback cal point Set low calibration point Select transient toggle mode and GPIB trigger source Turn transient mode on and set transient calibration point Trigger transient le
35. FLOATING VOLTAGE DC ISOLATION 6060B 17 mV via GPIB 20 mV front panel 50 ppm C 1 2 mV C 65 to 70 V typical to 10 Vdc or 0 to 10 Vac 10 kHz 3 db frequency 4 5 75 mA 4 5 250 mA 0 8 200 mV 100 6 9 100 ppm C 1 mV C 49 85 mA 50 ppm C 6 mA C 0 25 40 mV 50 ppm C 0 2 mV C 61 2 A 75 V 6063B 67 mV via GPIB 100 mV front panel 100 ppm C 8 mV C 260 V typical 3 10mA 3 20 mA 0 5 150 mV 150 ppm C 1 mA C 120 ppm C 10 mV C 3 10 mA 100 ppm C 1 mA C 0 4 240 mV 70 ppm C 1 2 mV C 10 2 A 250 V 240 Vdc between or input binding post and chassis ground DIGITAL INPUTS Vlo 0 9 V maximum at Ilo 1 mA Vhi 3 15 V minimum pull up resistor on input DIGITAL OUTPUTS Vlo 0 72 V maximum at Ilo 1 mA 4 4 V maximum at Ilo 20 WA INPUT CURRENT 100 Vac 400 mA 120 Vac 350 mA 220 Vac 200 mA 240 Vac 180 mA 14 General Information Table 1 2 Supplemental Characteristics continued Fuse The ac input is protected by a fuse located in a module on the rear panel 0 5AM for 100 120 Vac input 0 25AM for 220 240 Vac input Maximum VA 60 Peak Inrush Current 2 5 A typical PROGRAMMABLE SLEW RATE For any given input transition the time required will be either the total slew time or a minimum transition time whichever is larger The minimum
36. GPIB TRIG SOUR BUS TURN TRANSIENT MODE ON TRAN 1 OR TRAN ON LOW ipi Y MIDDLE OR HIGH RANGE SEE NOTE 1 SET TRANSIENT CAL POINT FOR LOW RANGE RES TLEV Lo res hipt SEE TABLE 6 2 SEE TABLE 6 2 SET TRANSIENT CAL POINT FOR MIDDLE OR HIGH RANGE RES TLEV Mid res lopt OR RES TLEV Hi res lopt Y TRIGGER TRANSIENT LEVEL TRG DIVIDE VOLTAGE MEASURED AT LOAD INPUT BY THE CURRENT MEASURED ACROSS THE SHUNT ENTER THE VALUE IN OHMS CAL TLEV lt NRf gt Y TURN TRANSIENT MODE OFF TRAN 0 OR TRAN OFF VERIFY THAT TRANSIENT OPERATION IS WITHIN SPEC 0 NO SAVE CAL CONSTANTS CAL SAVE TURN CAL MODE OFF CAL 0 OR CAL OFF Y TURN THE UNIT OFF LOW RANGE Y HIGH RANGE SET LOW CAL POINT FOR LOW RANGE RES lt Lo_res_lopt gt SEE TABLE 6 2 SET HIGH CAL POINT FOR MIDDLE OR HIGH RANGE RES lt Mid_res_hipt gt OR RES lt Hi_res_hipt gt SEE TABLE 6 2 NOTE 1 THE TRANSIENT LEVEL FOR THE MIDDLE AND HIGH OHM RANGES IS LESS THAN THE MAIN LEVEL Figure 6 2 Calibration Flowchart continued Calibration 81 Program Listing 10 210 220 230 240 250 260 270 280 290 300 310 320 330 340 350 360 370 380 390 400 410 420 430 440 450 460 470 480 490 500 510 ASSIG
37. LE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES WHETHER BASED ON CONTRACT TORT OR ANY OTHER LEGAL THEORY ASSISTANCE The above statements apply only to the standard product warranty Warranty options extended support contracts product maintenance agreements and customer assistance agreements are also available Contact your nearest Agilent Technologies Sales and Service office for further information on Agilent Technologies full line of Support Programs SAFETY SUMMARY The following general safety precautions must be observed during all phases of operation service and repair of this instrument Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design manufacture and intended use of the instrument Agilent Technologies assumes no liability for the customer s failure to comply with these requirements GENERAL This product is a Safety Class 1 instrument provided with a protective earth terminal The protective features of this product may be impaired if it is used in a manner not specified in the operation instructions Any LEDs used in this product are Class 1 LEDs as per IEC 825 1 This ISM device complies with Canadian ICES 001 Cet appareil ISM est conforme la norme NMB 001 du Canada ENVIRONMENTAL CONDITIONS This instrument is intended for indoor use in an installation category II pollution degree 2 environment It is de
38. LS TWID 001 Remote Operation 71 Line 10 Line 20 Line 30 Line 40 Line 50 Line 60 Line 70 Line 80 Line 90 Line 100 to Line 190 80 OUTPUT 705 TRAN ON 90 OUTPUT 705 INPUT ON 200 OUTPUT 705 TRG 210 END Turns off Electronic Load input Selects the CR mode Selects the main resistance level to 10 ohms Sets the transient resistance level to 5 ohms Remember in the 1 to 1k range the transient resistance level must be set to a lower level than the main resistance level Selects the GPIB as the trigger source Sets the current slew rate to the fastest rate Remember that in the middle range the resistance slew rate is programmed in amps second Selects pulsed transient operation and sets the pulse width to 1 millisecond Turns on the transient generator Turns on Electronic Load input Other commands are executed Line 200 The TRG command generates a 1 millisecond pulse at the Electronic load input Table 5 1 Remote Programming Ranges HPSL Command Function Short Form Range of Values Constant Current CC Set Range CURR RANG value 6060B 6063B Low Range gt Oand lt 6A gt 0and lt 1 High Range gt lt 60A gt land lt 10 Set Main Level CURR value Low Range OtolA High Range 0 to 60 A 0to 10A Set Slew Rate CURR SLEW value Low Range 100 to 500 000 A s 1 7 to 83 000 A s High Range 1000
39. MING AND READBACK ARE WITHIN SPEC SET DC POWER SUPPLY FOR VOLTAGE CALIBRATION SEE TABLE 6 2 Y SET LOW CAL POINT VOLT lt Volt_lopt gt SEE TABLE 6 2 SET LOW CAL POINT 5 OF VOLTAGE RANGE Y Y TURN TOGGLE MODE ON TRAN MODE TOGG CHECK THAT THE POWER SUPPLY IS IN CC MODE Y SET TRIGGER SOURCE TO GPIB TRIG SOUR BUS MEASURE VOLTAGE ACROSS INPUT TERMINALS ENTER VALUE IN VOLTS CAL LEV LOW lt NRf gt CAL MEAS LOW lt NRf gt TURN TRANSIENT MODE ON TRAN 1 OR TRAN ON Y Y SET HIGH CAL POINT 85 OF VOLTAGE RANGE Y SET TRANSIENT CAL POINT VOLT TLEV lt Volt_hipt gt SEE TABLE 6 2 MEASURE VOLTAGE ACROSS INPUT TERMINALS ENTER VALUE IN VOLTS CAL LEV HIGH lt NRf gt CAL MEAS HIGH lt NRf gt TRIGGER TRANSIENT LEVEL Y TRG SET HIGH CAL POINT 100 OF VOLTAGE RANGE MEASURE VOLTAGE ACROSS INPUTS ENTER VALUE IN VOLTS CAL TLEV lt NRf gt Y MEASURE VOLTAGE ACROSS INPUT TERMINALS ENTER VALUE IN VOLTS CAL LEV HIGH lt NRf gt CAL MEAS HIGH lt NRf gt TURN TRANSIENT MODE OFF TRAN 0 OR TRAN OFF VERIFY THAT TRANSIENT OPERATION IS WITHIN SPEC Y SET LOW CAL POINT VOLT_LOPT Y MEASURE VOLTAGE ACROSS INPUT TERMINALS ENTER VALUE IN VOLTS CAL LEV LOW lt NRf gt C
40. MODE MEASURE CURRENT ACROSS SHUNT ENTER VALUE IN AMPS CAL LEV HIGH lt NRf gt SET HIGH CAL POINT 100 OF CURRENT RANGE Y MEASURE CURRENT ACROSS SHUNT ENTER VALUE IN AMPS CAL LEV HIGH lt NRf gt SEND VALUE IN AMPS TO READ BACK CAL MEAS HIGH lt NRf gt LOW RANGE SET LOW CAL POINT IF HIGH RANGE 4 LSB OF RANGE IF LOW RANGE 10 LSB OF RANGE p VERIFY THAT CC MODE CURRENT PROGRAMMING AND READBACK ARE WITHIN SPEC Y SET LOW CAL POINT FOR HIGH OR LOW RANGE CURR 0 05 curr rng OR CURR 0 05 Lo rng SEE TABLE 6 2 Y TURN TOGGLE MODE ON TRAN MODE TOGG Y SET TRIGGER SOURCE TO GPIB TRIG SOUR BUS Y TURN TRANSIENT MODE ON TRAN 1 OR TRAN ON Y SET TRANSIENT CAL POINT FOR HIGH OR LOW RANGE CURR TLEV 0 85 OR CURR TLEV 0 85 Lo_curr_rng SEE TABLE 6 2 Y TRIGGER TRANSIENT LEVEL TRG y MEASURE CURRENT ACROSS SHUNT ENTER VALUE IN AMPS CAL TLEV lt NRf gt y TURN TRANSIENT MODE OFF TRAN 0 OR TRAN OFF y VERIFY THAT TRANSIENT OPERATION IS WITHIN SPEC y 9 VOLT CAL Figure 6 2 Calibration Flowchart Calibration Va FROM CURR CAL Uo wey d Y SELECT VOLTAGE MODE MODE VOLT Y VERIFY THAT CV MODE VOLTAGE PROGRAM
41. N Ld TO 705 Chan l OUTPUT GLd CHAN Chan CAL ON Cal curr GLd Chan Hi rng Hi offset l Cal curr GLd Chan Lo curr rng Lo curr offset 0 Cal_volt Ld Chan Volt_hipt Volt lopt Cal res GLd Chan Lo res rng Lo res hipt Lo res lopt O Cal res GLd Chan Mid res rng Mid res hipt Mid res lopt l Cal res GLd Chan Hi res rng Hi res hipt Hi res lopt 1 OUTPUT Ld CAL SAV OUTPUT Ld CAL OFF END SUB Cal curr GLd 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 PRINT Press CONT when ready PAUSE OUTPUT Ld CHAN Chan OUTPUT Ld MODE CURR OUTPUT GLd CURR RANG Curr rng OUTPUT GLd CURR 05 Curr rng INPUT Enter current through shunt for low point in amps Lopt curr OUTPUT GLd CAL LEV LOW Lopt curr OUTPUT GLd CURR 85 Curr rg IF Flag THEN WAIT 25 INPUT Enter current through shunt for high point in amps Hipt curr OUTPUT Ld CAL LEV HIGH Hipt_curr OUTPUT GLd CURR Cur rng INPUT Enter current through shunt for high point in amps Hipt curr OUTPUT Ld CAL LEV HIGH Hipt_curr IF Flag THEN OUTPUT Ld CAL MEAS HIGH Hipt_curr IF Flag THEN WAIT 25 IF Flag THEN OUTPUT GLd CURR 4 Curr rng 3750 WAIT 1 INPUT Enter current through shunt for low point in amps Lopt_curr OUTPUT GLd CAL LEV HIGH Lopt curr Curr offset OUTPUT
42. OFF 20 OUTPUT 705 MODE VOLT 30 OUTPUT 705 VOLT TRIG 10 40 OUTPUT 705 TRIG SOUR EXT 50 OUTPUT 705 INPUT ON 60 END Line 10 Turns off Electronic Load input Line 20 Selects the CV mode Line 30 Presets the voltage level to 10 volts Line 40 Selects the external input as the trigger source Line 50 Turns on Electronic Load input In this example when the Electronic Load receives the external trigger signal the input voltage level will be set to 10 volts CR Mode Example This example 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 INPUT OFF 20 OUTPUT 705 MODE RES 30 OUTPUT 705 CURR PROT LEV 2 DEL 5 40 OUTPUT 705 CURR PROT STAT ON 50 OUTPUT 705 RES RANG 25 60 OUTPUT 705 RES 100 70 Remote Operation Line 10 Line 20 Line 30 Line 40 Line 50 Line 60 Line 70 Line 80 Line 90 Line 100 70 OUTPUT 705 INPUT ON 80 OUTPUT 705 MEAS POW 90 ENTER 705 A 100 DISP A 110 END Turns off Electronic Load input Selects the CR mode Sets the current protection limit to 2 A with a trip delay of 5 seconds Enables the current protection feature Selects the middle range Sets the resistance level to 100 ohms Turns on Electronic Load input Measures the computed input power level and stores it in a buffer inside the Electronic L
43. Operating Manual Agilent Technologies Single Input Electronic Load Family Agilent Technologies Agilent Part No 5951 2826 Printed in Malaysia Microfiche Part No 5951 2827 September 2004 CERTIFICATION Agilent Technologies certifies that this product met its published specifications at time of shipment from the factory Agilent Technologies further certifies that its calibration measurements are traceable to the United States National Bureau of Standards to the extent allowed by the Bureau s calibration facility and to the calibration facilities of other International Standards Organization members WARRANTY This Agilent Technologies hardware product is warranted against defects in material and workmanship for a period of three years from date of delivery Agilent Technologies software and firmware products which are designated by Agilent Technologies for use with a hardware product and when properly installed on that hardware product are warranted not to fail to execute their programming instructions due to defects in material and workmanship for a period of 90 days from date of delivery During the warranty period Agilent Technologies will at its option either repair or replace products which prove to be defective Agilent Technologies does not warrant that the operation of the software firmware or hardware shall be uninterrupted or error free For warranty service with the exception of warranty options this product must be retu
44. RENT PRESET LEVEL CURR TRIG RES TRIG OR VOLT TRIG SELECT TRIGGER SOURCE TRIG SOUR EXT BUS HOLD GO TO SHEET 2 Figure 5 1 Remote Programming Flowchart Sheet 1 68 Remote Operation YES CURRENT PROTECTION NO SET PROTECTION LEVEL SET PROTECTION DELRY TURN PROTECTION ON CURR PROT CURR PROT DEL 3 SELECT CONTINUOUS PULSED OR TOGGLED TRANSIENT OPERATION TRAN MODE CONT PULS TOGG Figure 5 1 Remote Programming Flowchart Sheet 2 Remote Operation 69 CC Mode Example This example sets the current level to 0 75 amps and then reads back the actual current value 10 OUTPUT 705 INPUT OFF 20 OUTPUT 705 MODE CURR 30 OUTPUT 705 CURR RANG 1 40 OUTPUT 705 CURR 0 75 50 OUTPUT 705 INPUT ON 60 OUTPUT 705 MEAS CURR 70 ENTER 705 A 80 DISPA 90 END Line 10 Turns off Electronic Load input Line 20 Selects the CC mode Line 30 Selects the low current range Line 40 Sets the current level to 0 75 amps Line 50 Turns on Electronic Load input Line 60 Measures the actual input current and stores it in a buffer inside the Electronic Load Line 70 Reads the input current value into variable A in the computer Line 80 Displays the measured current value on the computer s display CV Mode Example This example presets the voltage level to 10 volts and selects the external trigger source 10 OUTPUT 705 INPUT
45. Resistance 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 Therefore resistance is described by the formula V R I in which input current I is the reference and voltage at the input terminals V is the parameter controlled to determine the resistance of the load The middle and high ranges are regulated with the CC circuits using the input voltage monitor as the reference Resistance is described by the formula 1 R lt in which input voltage V is the reference and current through the input terminals I is the parameter controlled to determine the resistance of the load The reciprocal of resistance 1 R is conductance G Therefore the two highest ranges are best thought of as constant conductance ranges with the CC circuit used to control conductance This affects how the specified accuracy offset errors in siemens or 1 ohms formerly mhos relate to programmed values in ohms Any offset voltages in the op amps that comprise the load s regulator circuits become errors at the input terminals of the load In both CV and CC modes the offset is constant across the specified operating range and can be accounted for during calibration The effects of offsets on CR mode accuracy are specified as plus or minus constant values in mill
46. SOUR EXT Selects the external trigger input TRAN MODE PULS Selects pulsed transient operation CURR 5 Sets main current level to 5 amps CURR TLEV 10 Sets transient current level to 10 amps TRAN TWID 001 Sets pulse width to 1 millisecond TRAN ON Turns on transient operation Figure 2 5 shows the waveform that would result in this pulsed transient operation example The Electronic Load starts conduction at the main current level setting 5 amps When the transient mode is turned on and an external trigger signal is received the input level starts increasing at a rate determined by the slew rate When the value specified by the transient level setting 10 amps is reached it stays there for the remainder of the time determined by the pulse width setting 1 millisecond After this time has elapsed the input level decreases to the main level again at the rate specified by the slew setting and remains there until another trigger is received Any triggers that occur during the time the transient level is in effect will be ignored NOTE THERE MAY BE A DELAY BETWEEN THE TRIGGER AND THE LEADING EDGE OF THE PULSE AT EACH MODULES INPUT TRIG Figure 2 5 Pulsed Transient Operation Toggled Transient Operation Toggled transient operation causes the load input to alternate between two predefined levels as in continuous operation except that the transient points are controlled by explicit triggers instead of the internal transient generator
47. Y keys or via the GPIB TRAN FREQ command The duty cycle can be set from 3 to 97 0 25 Hz to 1 kHz or from 6 to 94 above 1 kHz at the front panel and ENTRY keys or via the GPIB TRAN DCYC command 24 Operation Overview For example assume that the CC mode is active the slew rate is at the default setting maximum rate and the applicable transient operation parameters have been set as follows HPSL Command Description TRAN MODE CONT Sets continuous operation CURR 5 Sets main current level to 5 amps CURR TLEV 10 Sets transient current level to 10 amps TRAN FREQ 1000 Sets transient generator frequency to 1 kHz TRAN DCYC 40 Sets transient generator duty cycle to 40 TRAN ON Turns on transient operation Figure 2 4 shows the waveform that would result in this example The load input current will slew to and remain at 10 amps for 40 of the period 400 us then slew to and remain at 5 amps for the remaining 60 600 us of that cycle FREQ Figure 2 4 Continuous Transient Operation The load starts conduction at the main level in this case 5 amps When transient operation is turned on and at a time specified by the frequency setting the input level starts increasing at a rate determined by the slew rate When the value specified by the transient level setting is reached it stays there for the remainder of the time determined by the frequency and duty cycle settings After this time has elapsed the input level decrease
48. all pending preset levels to the actual level For the presently active mode the new level appears at the input For the modes which are not presently active the preset levels will not take effect at the input until the applicable mode becomes active Triggering a transient pulse Generates a transient pulse of programmable width when pulsed transient operation is in effect Toggling Changes the input between the main level and the transient level when toggled transient operation is in effect Three triggering methods are available over the GPIB the GET function the TRG common HPSL command and the TRIG subsystem HPSL command refer to Programming Reference Guide The HPSL TRIG subsystem allows you to select the TRIG command as the trigger source There is also a TRIGGER connector on the rear panel for external trigger inputs Triggering cannot be done via the front panel TRG and the TRIG command are both synchronous with other commands that is the load is not triggered until pending operations are completed GET and external triggers are all asynchronous that is the loads are triggered as soon as the trigger signal is received The rear panel TRIGGER connector also provides a trigger output signal This signal is generated synchronously with the trigger signal sent by the load The trigger output signal can be used to trigger an external device such as an oscilloscope DVM or another Electronic Load The Electronic Load has a status
49. ases or fumes KEEP AWAY FROM LIVE CIRCUITS Operating personnel must not remove instrument covers Component replacement and internal adjustments must be made by qualified service personnel Do not replace components with power cable connected Under certain conditions dangerous voltages may exist even with the power cable removed To avoid injuries always disconnect power discharge circuits and remove external voltage sources before touching components DO NOT SERVICE OR ADJUST ALONE Do not attempt internal service or adjustment unless another person capable of rendering first aid and resuscitation is present DO NOT EXCEED INPUT RATINGS This instrument may be equipped with a line filter to reduce electromagnetic interference and must be connected to a properly grounded receptacle to minimize electric shock hazard Operation at line voltages or frequencies in excess of those stated on the data plate may cause leakage currents in excess of 5 0 mA peak DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT 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 Instruments which appear damaged or defective should be made inoperative and secured against unintended operation until they can be repaired by qualified
50. bled 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 When a mode is selected via the front panel or via the GPIB most of the associated parameters will take effect at the input exceptions are noted in the mode descriptions Constant Current CC Mode In this mode the load will sink a current in accordance with the programmed value regardless of the input voltage see Figure 2 1 The CC mode can be set with front panel keys MODE and or via the GPIB MODE CURR command The CC mode parameters are discussed in the following paragraphs Ranges Current may be programmed in either of two overlapping ranges a low range and a high range The low range provides better resolution at low current settings The range can be set at the front panel ENTRY keys or via the GPIB CURR RANG command Any value in the low range selects the low range Any value above the maximum of the low range selects the high range Changing the range affects the load in the same manner as changing modes i e it causes the input to go through a non conducting state for approximately 0 2 milliseconds Note that the values of the present current settings may be automatically adjusted to fit the new range For example if 10 A is the present setting and the 0 to 6 A range
51. c 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 Programming Reference Guide Transient Current Level The transient current level can be set at the front panel ENTRY keys or via the GPIB CURR TLEV command The transient current level determines the higher current level when transient operation described later in this chapter is turned on The load will switch between the main level and the transient level when transient operation is turned on Software Current Limit The Electronic Load allows the user to set a current limit from 0 to 102 of full scale via the GPIB CURR PROT command which will shut down the input if the current limit is exceeded beyond a programmable time delay Note that the software current limit is in effect for any mode of operation not just the CC mode The software current limit feature is described later in this chapter under Protection Features Operation Overview 21 Slew Rate Slew rate determines the rate at which the input level changes to a new programmed value Slew rate can be set at the front panel CURE and ENTRY keys or via the GPIB CURR SLEW command This slew rate remains in effect for the immediate triggered and transient level changes previously described There are 12 discrete current slew rates within each slew rate range Any slew rate value can b
52. ch Electronic Load is connected to the source using separate wires Using the source as the current distribution point allows larger wires to be used for each Electronic Load connection and also reduces the common impedance inherent in daisy chained configurations Figure 3 13 shows one method of triggering Electronic Loads that are connected in parallel The TRIG OUT signal of Electronic Load number 1 is connected to the TRIG IN input of Electronic Load number 2 Additional Electronic Loads can be daisy chained to Electronic Load number 2 in the same manner Once the new settings of the Electronic Loads have been programmed one trigger signal can be used to simultaneously set all of the Electronic Loads to their new settings Zero Volt Loading Connections As shown in Figure 3 14 the Electronic Load can be connected in series with a voltage source or auxiliary power supply greater than 3 V so that the Electronic Load can test devices at its full current capacity down to a zero volt level Remote sensing is recommended for improved load regulation and when turning the short on 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 Areainmm Olkm 5A 10A 20A 30A 40A 50 60A 22 16 15 6 3 las dd 0 77 0 62 0 52 0 5 40 1 25 12 06 04 10 31 0 25 0 21 20 10 16 9 5 45
53. ction with the ENTRY keys to recall the saved settings from the specified location Recall 0 through Recall 7 Recall 7 recalls the factory default settings Save shifted Recall key Used in conjunction with the ENTRY keys to save all of the present settings mode current resistance voltage etc in the specified register SAVE 0 thru SAVE 6 The settings in locations 1 thru 6 will be lost when ac power is cycled However SAVE 0 will cause the settings to be stored in non volatile memory and the next time the Electronic Load is turned on these settings will become the power on settings blue shift Key Activates shifted key functions e g Error Save Slew etc The Shift annunciator goes on when this key is pressed 50 Local Operation Table 4 1 Controls and Indicators continued Item 6 FUNCTION Keys Description Returns the display to the metering function selected the display will show the measured input voltage and current the computed input power or certain status conditions e g INPUT SHORT ON OC etc Press the Meter key to continually step through the displays Displays the setting for current C RNG or resistance R RNG depending upon which function is selected The settings can be changed using the ENTRY keys Input onloff Toggles the input and off Input Off disables the Electronic Load Input On enables the input and returns the Electronic Load to the original settings
54. ctronic Load is in the constant current CC mode Note that Figure 4 1 shows the Electronic Load is in the CC mode CC annunciator is on CR Indicates the Electronic Load is in the constant resistance CR mode CV Indicates the Electronic Load is in the constant voltage CV mode Tran Indicates that transient operation is enabled Unr Indicates that the Electronic Load is unregulated applies only in the CC mode and in the middle and high ranges of the CR mode Prot Indicates when any protection features CC OV OP OT etc are active Err Indicates that remote programming error s have occurred Shift Indicates that the shift key bottom key blue in SYSTEM group was pressed Rmt Indicates that the Electronic Load is in the GPIB remote state In the remote state the only front panel key that will function is the Local key Addr Indicates that the Electronic Load is addressed to talk or to listen over the GPIB SRQ Indicates that the Electronic Load is requesting service over the GPIB i e the service request line SRQ is active 5 SYSTEM Keys Returns the Electronic Load from remote computer control to local front panel control Displays the Electronic Load s GPIB address You can change the address using the numeric entry keys You cannot query or change the address remotely over the GPIB Error J shifted address key Displays error codes that resulted from remote programming Used in conjun
55. d In each example it is assumed that a dc power source is connected to the Electronic Load s input binding posts Also the following points are important to remember when you are remotely programming current resistance and voltage values 66 Remote Operation Modes The CC CR and CV values can be programmed whether or not the associated mode is active If the input is turned on all of the applicable values will take effect at the input when the associated mode is selected Ranges Changing the CC or CR programming range can cause the present settings to be automatically adjusted to fit within the new range See Setting CC Values and Setting CR Values in Chapter 4 During a range change the input will go through a non conducting state to minimize overshoots Transient levels The transient CC or CV level must be set to a higher level than the respective main level In the low range the transient CR level must be set to a higher level than the main CR level In the middle and high ranges the transient CR level must be set to a lower level than the main CR level Slew Rates The CC slew rate is programmed in amps second There are 12 steps for each of the two current ranges low and high The Electronic Load automatically selects one of the 12 steps that is closest to the programmed value The CV slew rate is programmed in volts second There are 12 steps within the voltage range The Electronic Load automatically selects one of the 1
56. d The protection shutdown PS and voltage fault VF conditions also latch when tripped The Prot annunciator on the front panel goes on when any of the above features are tripped To reset any of these protection features press Prot Clear Note The condition that caused the protection feature to trip must be removed or it will trip again as soon as it is reset Also if OT occurs the Electronic Load must have sufficiently cooled down in order for the to take effect Using The System Keys These keys consist of Local Address Error shifted Address key Recall Save shifted Recall key and the blue shift key The Local key and the Shift key have already been discussed The remaining SYSTEM keys are described in the following paragraphs Local Operation 61 Setting The Electronic Load s GPIB Address Before you can program the Electronic Load remotely via a GPIB computer you must know its GPIB address You can find this out by pressing The Electronic Load s GPIB address will be displayed for example ADDRESS 5 The Electronic Load is shipped from the factory with its address set to 5 If you want to leave the address set at 5 you can return to the metering mode by pressing the Meter key If you want to change the address you can enter a new value Any integer from 0 to 30 can be selected For example to change the address to 12 press Address 27 Enter This new address will remain set and will not be los
57. d GmbH Herrenberger Strafe 130 071034 B blingen Germany Revision B 00 00 Issue Date Created on 11 24 2003 3 34 Document No 60xyz Loads 11 24 doc To obtain the latest Declaration of Conformity go to http regulations corporate agilent com and click on Declarations of Conformity Table of Contents General Information What sn this Manual eec de eet een eder ee eite dp ea idee e iei dp ie leet oed 9 a ua aaa Vere gu e BEES Free UP cee assia 9 a use ege edite em eee e ERU 9 satety Requirements i ete e o P t ete repro Ot riesigen 10 Specifications uy ie eem benign lege en leen e eni 10 Operation Overview Ini mr E M 19 Front Panel Description pe RO e RUE ERU ese ee eden eee 19 Remote Programming cater reser DERE Net Te ore eei Ep EEE E 19 L ocal Remote Conttol 5 5 te ete t sce co rure UR ORI RU GRE EORR 20 Programmable Features e eec iade 20 Modes of Op rationci siete iod Ble ete eel RR eel need Soe eee Stes 20 Constant Current CC Mode iss pene cereo h ibu atasi 20 Constant Resistance CR 2 1 4 0 00000000000000000000000000000 00000080000000 entere nnne nnns 22 Constant Voltage CV cer E ete ER Run 23 Transient eene ea R tee eR Petr 24 Trig
58. d using the ENTRY keys The Dcycle setting determines the TLEV portion percentage of the duty cycle in continuous transient operation Prot Clear Clears the latching type protection circuits overvoltage overpower overtemperature and overcurrent user programmed Displays the active mode constant current MODE CURR constant resistance MODE RES or constant voltage MODE VOLT The active mode can be changed using the CURR RES or VOLT key followed by the Enter key Displays the main current setting e g CURR 3 275 This setting can be changed using the ENTRY keys The CURR key also selects the CC mode MODE CURR in conjunction with the MODE and Enter keys Local Operation 51 Table 4 1 Controls and Indicators continued Item Description 6 FUNCTION Keys continued Displays the resistance setting e g RES 1000 This setting can be changed using the ENTRY keys The RES key also selects the CR mode MODE RES in conjunction with the MODE and Enter keys VOLT Displays the voltage setting e g VOLT 5 567 This setting can be changed using the ENTRY keys The VOLT key also selects the CV mode MODE VOLT in conjunction with the MODE and Enter keys 7 ENTRY Keys 0 to 9 Set the value of the specified function e g CURR 2 525 RES 1000 VOLT 7 000 etc F backspace Erases the previous keystroke in order to make corrections before entering a new setting Enters
59. ddress 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 7 shows the rear panel of the Agilent 6060A Electronic Load GPIB POWER INPUT BINDING POST CONNECTOR CONNECTOR SENSE CONTROL TRIGGER SWITCH CONNECTOR CONNECTOR Figure 3 7 Rear Panel Input Binding Posts Two screw down binding posts and connect the input wires to the Electronic Load see Figure 3 8 Connections are made as follows 1 Strip back the wire insulation as indicated Wire Size Strip back AWG 4 16mm AWG 8 13 mm AWG 10 or smaller 10 mm AWG 4 is the maximum wire size AWG 6 or 8 is the recommended wire If you are connecting more than one wire on each post solder or twist the wires to ensure a good contact on each wire when the adjustment knob is tightened 2 Insert the wire into the binding post Do not extend the wire beyond the bottom of the binding post 40 Installation 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 Ibf for a secure connection Installation for the optional front panel binding posts is the same as for the rear terminal binding posts CAUTION Do not use lubricants or contact cleaners on the binding posts Certain chemical agents can damage the LEXAN mate
60. does not have to be sent until all ranges and modes have been calibrated If the unit is turned off before CAL SAVE is sent the new calibration constants are lost Calibration Flowcharts The flowchart in Figures 6 2 describes the calibration procedure It corresponds to the example calibration program The flowchart indicates the appropriate statement that is used in the program example to accomplish each step It also indicates when to set the power supply to the appropriate voltage and current output Refer to Table 6 2 for the variable values power supply settings and current shunts associated with the model that you are calibrating Calibration mode is turned on at the beginning of the calibration procedure Remember to save the calibration constants after you have verified that they are within specifications Do not turn calibration mode off until after you have saved the new calibration constants otherwise the new calibration constants will be lost Note When calibrating the high calibration point of the high current range and high current transient level you must wait about 30 seconds for the internal current shunt of the module to stabilize with the full current applied before you execute the CAL MEAS HIGH command Because the high current range calibration causes the Electronic Load to heat up you should also allow about 30 seconds time for the unit to cool down to room temperature before continuing to calibrate any other modes or range
61. drop in the load leads remote sensing provides greater accuracy by allowing the load to regulate directly at the source s output terminals as well as measure the voltage there 32 Operation Overview Monitor Outputs The IMON and VMON output signals indicate the input current and voltage A 0 to 10V signal at the appropriate output indicates the zero to full scale input current or voltage An external DVM or oscilloscope can be connected to monitor the input voltage and current 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 Figure 2 9 shows the input waveform that would result from the following setup CC Mode High Range 60 Full Scale programmed via GPIB or front panel 1 V 2 V pk pk 1 kHz external programming signal The external programming signal and volt corresponds to and 1 10 full scale values at the input 1 volt external programming input 1 10 full scale Therefore the load s input current values between 50 and 70 of full scale as shown in Figure 2 9 Fault The Fault signal becomes ac
62. e ERROR 100 Self test error ERROR 5 Internal trigger failed ERROR 101 Secondary RAM failure ERROR 102 Secondary ROM failure power board disconnected or thermistor open ERROR 103 Secondary timer trigger failed ERROR 104 Calibration EEprom failed ERROR 105 Main DAC high ERROR 106 Main DAC low ERROR 107 Transient DAC high ERROR 108 Transient DAC low Requires calibration Another indication that the Electronic Load has failed selftest is if the ERR annunciator on the display remains on after selftest completes If the Electronic Load has failed selftest return the unit to the nearest Agilent Sales and Service Office for repair 38 Installation Power Test Note The following checkout assumes that the Electronic Load is set to the factory defaults listed in Table 4 6 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 circuits The settings of the power supply were only selected to agree with the following procedure You can use different settings but you must set the Electronic Load accordingly 1 Connect the power supply to the Electronic Load input binding posts using heavy wires to minimize the voltage drop in the wires 2 Observe that the front panel of the Electronic Load displays the voltage that the power supply was set to 10 V 3 Depress the following front panel keys in the indicated order CURR
63. e above protection features are active Also the Prot annunciator comes on and the front panel alphanumeric display indicates which conditions have been detected For example if an overtemperature OT condition has been detected causing the input to be turned off protection shutdown PS the display will indicate PS OT Resetting Latched Protection All of the protection features latch remain set when they are tripped except for the hardware overcurrent and reverse voltage The latched protection features can be reset via the GPIB RST or INP PROT CLE commands or at the front panel LProt Clear Of course the condition that caused the protection feature to trip must be removed or it will trip again as soon as it is reset CAUTION To protect the Electronic Load from possible damage the input voltage must not exceed the specified maximum input voltage rating Never apply the ac line voltage to a load s input binding posts Overvoltage The overvoltage protection circuit is set at a predetermined voltage which cannot be changed if the overvoltage circuit has tripped the load will attempt to limit the voltage by drawing current from the DC source The load limits the value of current drawn such that the resulting power is within the power rating The overvoltage OV and voltage fault VF status register bits are set when the OV condition occurs and will remain set until they are reset as previously described An overvoltage
64. e dimensions of the Electronic Load The cabinet has plastic feet that are shaped to ensure self alignment when stacked with other Agilent System II cabinets The feet may be removed for rack mounting Your Electronic Load must be installed in a location that allows sufficient space at the sides and rear of the unit for adequate air circulation The unit can be mounted in a standard 19 inch rack panel or enclosure Rack mount kits are available as option numbers 908 and 909 with handles Installation instructions are included with each rack mounting kit Instrument support rails are recommended for non stationary installations The unit can operate without loss of performance within the temperature range of 0 to 40 C and with derated performance from 40 to 55 C A variable speed fan cools the unit by drawing in air through the sides and exhausting it out the back Using Agilent rack mount or slide kits will not impede the flow of air Turn On Checkout The simplified turn on checkout procedure discussed in this section verifies that about 90 of the Electronic Load is operating correctly The Service Manual Option 910 contains detailed performance and verification tests Before connecting the power cord and turning on the Electronic Load check that the line voltage is set correctly and that the sense switch is set to Local Check Line Voltage Your Electronic Load can operate with a 100 120 220 or 240 Vac input as indicated on the label o
65. e sent to a load there are no upper and lower limits that would cause an error and a load will automatically select one of the 12 rates that is closest to the programmed value The slew rate is rescaled to the closest fit in the 1 12 discrete steps if the current range is changed Constant Resistance CR Mode In this mode the load will sink a current linearly proportional to the input voltage in accordance with the programmed resistance see Figure 2 2 The CR mode can be set at the front panel MODE and Enter keys or via the GPIB MODE RES command The CR mode parameters are described in the following paragraphs LOAD CURRENT INPUT VOLTAGE Figure 2 2 Constant Resistance Mode Ranges Resistance may be programmed in any of three overlapping ranges low middle high The range can be set at the front panel RES 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 range and above the maximum low range value selects the middle range Any value that is within the high range and above the maximum middle range value selects the high range Note that the values of the present resistance settings may be automatically adjusted to fit within the new range Immediate Resistance Level The resistance level can be set at the front panel and ENTRY keys or via the GPIB RES command If the CR mode is the active mode the n
66. e transient level must be set to a lower resistance value than the main level Slew Rate Slew rate in resistance mode is not programmed in ohms second In the low resistance range slew rate is programmed in volts second Whatever value is programmed for the voltage slew rate is also used for the low resistance range In the middle and high resistance ranges slew rate is programmed in amps second Whatever value is programmed for the current slew rate is also used for the middle or high resistance ranges Constant Voltage CV Mode In this mode the load will attempt to sink enough current to control the source voltage to the programmed value see Figure 2 3 The load acts as a shunt voltage regulator when operating in the CV mode The CV mode can be set at the front panel MODE VOLT and Enter keys or via the GPIB MODE VOLT command The CV mode parameters are described in the following paragraphs Range Voltage mode has only one range INPUT VOLTAGE LOAD CURRENT Figure 2 3 Constant Voltage Mode Operation Overview 23 Immediate Voltage Level The voltage level can be set at the front panel VOLT and ENTRY keys or via the GPIB VOLT command If the CV mode is the active mode the new setting immediately changes the input level at a rate determined by the voltage slew setting If the load is not in the CV mode the new setting is saved for use when the mode is changed to CV Triggered Voltage Level The voltage l
67. emember that if the CC mode is active the incremented or decremented values will immediately change the actual input 3 Set Slew Rate a First press the blue shift key and note that the Shift annunciator goes Now press shifted Tran Level key to determine the slew setting Note that the display indicates C SLW and the maximum slew rate setting for the low range b slew rate to 0 0025 A us by pressing CJ 0 0 5 Press Slew again and check that the display indicates C SLW 0 0025 or the closest slew rate step to this value depending upon the model being programmed 4 Set Transient Level The transient current level C TLV is meaningful only if transient operation described later is turned on Note Remember that you set the main current level to 0 5 amps in step 2 In CC mode the transient level must be set to a higher level than the main level a Set the transient level to amp by pressing 56 Local Operation b Press again and note that the display indicates C TLV 1 0000 Note that you can use the Input ENTRY keys to increment and decrement the transient current level Operation is similar to that described above for the main current level Setting CR Values The CR values are programmed by pressing the applicable FUNCTION keys and then setting the desired value using the ENTRY keys The display identifies the selected function for example R RNG identifies resistance ran
68. ent voltage level Operation is similar to that described above for the main voltage level Transient Operation Transient operation can be used in the CC CR or CV mode It causes the Electronic Load to switch between two load levels Only continuous transient operation can be programmed from the front panel Pulsed and toggled transient operation as well as continuous transient operation can only be programmed remotely via the GPIB computer In continuous transient operation a repetitive pulse train switches between two load levels Transient operation is turned on and off at the front panel using the Tran on off key Before you turn on transient operation you should set the desired mode of operation as well as all of the values associated with transient operation The two load levels in transient operation are the main and transient levels previously described for CC CR and CV The rate at which the level changes is determined by the associated slew rate setting In addition to the mode dependent parameters mentioned above the frequency and the duty cycle of the continuous pulse train are programmable see Table 4 5 Table 4 5 Continuous Pulse Train Programming Ranges Function Key Display Range of Values Frequency FREQ value 0 25 to 10000 Hz Duty Cycle shifted DCYCLE value 3 to 97 0 25 Hz to 1 kHz 6 to 94 1 kHz to 10 kHz The following example illustrates how to program transient operation in the CC mode 1 Setup
69. erence summary of all of the HPSL commands that can be used to program the Electronic Load It also covers the Electronic Load s GPIB functions status reporting capabilities and error messages Note The programming examples that follow are written in BASIC Programming Language for use with HP Series 300 computers You may convert these 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 Electronic Load to listen and sends information to the Electronic Load is OUTPUT The Agilent BASIC language statement that addresses the Electronic Load to talk and reads information back from the Electronic Load is ENTER The Electronic Load s front panel Rmt annunciator is on when it is being controlled remotely via a GPIB controller and its Addr annunciator is also on when it is addressed to talk or to listen GPIB Address Before you can program your Electronic Load remotely via a GPIB computer you need to know its GPIB address Each instrument you connect to the GPIB interface has a unique address assigned to it The address allows the system controller to communicate with individual instruments The Electronic Load s GPIB address is set locally at the front panel using the Address key as described in Chapter 4 The examples in this chapter assume that the Electron
70. ers will probably refer only to the Programming Reference Guide The programming guide covers all of the programming details whereas Chapter 5 in this manual gives a few simple examples to help you get started in writing computer programs Options Unless one of the following line voltage options is ordered the unit is shipped from the factory set for 120 Vac 48 63 Hz ac input power If Option 100 220 or 240 is ordered the unit will be factory set for the appropriate line voltage For information about changing the line voltage setting see Turn On Checkout in Chapter 3 100 Input Power 100 Vac 48 63 Hz 220 Input Power 220 Vac 48 63 Hz 240 Input Power 240 Vac 48 63 Hz Additional options are 020 Front paenl input binding posts 908 One rack mount kit 909 One rack mount kit with handles 910 One service manual with extra Operating Manual and Programming Reference Guide General Information 9 Safety Requirements This product is a Safety Class 1 instrument which means that it is provided with a protective earth ground terminal This terminal must be connected to an ac source that has a 3 wire ground receptacle Review the instrument rear panel and this manual for safety markings and instructions before operating the instrument Refer to the Safety Summary page at the beginning of this manual for a summary of general safety information Specific safety information is located at appropriate places in this manual The Elec
71. es The following examples illustrate how to program CV values Before you do these examples press to set the CV values to their factory default values 1 Set Main level a Set the main voltage level to 20 volts by pressing VOLT 2 0 Enter b Press VOLT again and check that the display indicates VOLT 20 000 Local Operation 59 Note that you can use the ENTRY keys to increment A or decrement W the main VOLT level setting You can see the VOLT setting being incremented or decremented one step at a time 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 2 Set Slew Rate a First press blue shift key and note that the Shift annunciator goes on Now press shifted Tran Level key to determine the present slew setting Note that the display indicates V SLW and the maximum slew rate b Setthe slew rate to 0 5 V us by pressing Enter c Press and again and note that the display indicates V SLW 0 5000 or the closest slew rate step to this value depending upon the model being programmed 3 Set Transient Level a Setthe transient voltage level to 30 volts by pressing 0 b Press again and note that the display indicates V TLV 30 000 Note that you can use the Input Entry keys to increment and decrement the transi
72. ette 22 external programming IpBputu a u nennen teen trennen enne enne W ass 34 44 external tigger i senes donee OE Nae Des 28 45 F factory default settings noce era t PERO P OU ORE RI Rb t beer eie REPE Re RUE 32 68 fatispeed zas uma aa n n a maaa tite b tenti tese eee testet ouest eee Ee 21 i E D kaa 44 Irequency e RU RESISTE a 63 front panel display eee eet Dee re ee e nee 51 54 nini PC ee eres 53 54 55 Index 89 INDEX continued G et rete eu t tere ee eT 42 64 67 m ee eum m ce E 41 GPIB device ren ar na Neate 67 GPIB sU RUND O 22 67 H HPSIEcommiands teet E E EH ELE ERE NRI vA HUE 22 67 68 1mmediate current Q ha S a h a u EFE br RE rd E 23 IMMeEdiate r sistance EK EE 24 immediate voltage x n D Hired eripe pere 25 input CONNECTIONS 42 nig
73. evel can be preset stored in the Electronic Load allowing the input level to change when a trigger is received instead of immediately as previously described The voltage level can only be preset via the GPIB VOLT TRIG command Transient Voltage Level The transient voltage level can be set at the front panel VOLT and ENTRY keys or via the GPIB VOLT TLEV command The load input will switch between the main level and the transient level when transient operation is turned on The transient voltage level determines the higher voltage level Slew Rate Slew rate determines the rate at which the voltage changes to a new programmed setting Slew rate can be set at the front panel VOLT Slew and ENTRY keys or via the GPIB VOLT SLEW command This slew rate remains in effect for the immediate triggered and transient voltage level changes described above There are 12 discrete slew rates that can be programmed for CV Mode slew rate Any slew rate value can be sent to the load there are no upper and lower limits that would cause an error The load will automatically select one of the 12 rates that is closest to the programmed value It is important to note that the fastest slew rates cannot be achieved because of bandwidth limitations refer to the specifications table Transient Operation Transient operation enables the load to periodically switch between two load levels as might be required for testing power supplies A power sup
74. evel is 1 ohm maximum value low range R TLV 1 0000 transient level is 1 ohm maximum value low range V SLW 5 0000 slew rate is 5 V us low range uses the CV slew rate setting If you now select the high range R RNG 10000 the settings will be automatically adjusted to fit into the new range as follows RES 10 000 main level is 10 ohms minimum value high range R TLV 10 000 transient level is 10 ohms minimum value high range C SLW 50000 slew rate is 0 5 A us high resistance range uses the CC slew rate setting Examples The following examples illustrate how to set CR values Before you do these examples press to set the CR values to their factory default states see Table 4 6 1 Set Range a Press RES to select the CR function Now press to determine which range is presently selected Note that the display indicates R RNG and the maximum middle range resistance value This means the middle range is presently selected b Selectthe low range by pressing c Press and note that the display indicates R RNG and the maximum low range value This means the low range is presently selected 2 Set Main Level a Press and note that the display indicates RES and the maximum low range resistance value b Setthe main resistance level to 0 4 ohms by pressing 4 c Press again and check that the display indicates RES 0 4000 You can use ENTRY keys to increment and decrement W the RES setting You can
75. ew setting immediately changes the input at a rate determined by the voltage or current slew setting see description below If the load is not in the CR mode the new setting is saved for use when the mode is changed to CR 22 Operation Overview Triggered Resistance Level The resistance level can be preset stored in the Electronic Load allowing the input level to change when a trigger is received instead of immediately as previously described The resistance level can only be preset via the GPIB RES TRIG command The preset capability is not available at the front panel If the CR mode is the active mode the preset resistance level will become the actual value and the input will be updated when a trigger occurs If the CR mode is not the active mode the preset resistance level will become the actual value when a trigger occurs but there will be no effect on the input until the CR mode becomes active Once a level is triggered subsequent triggers will have no effect on the input unless another CURR TRIG command is sent Transient Resistance Level The transient resistance level can be set at the front panel RES and ENTRY keys or via the GPIB RES TLEV command The transient level and the main level are used in transient operation which is described later in this chapter In the low resistance range the transient level must be set to a higher resistance value than the main level However in the middle and high resistance ranges th
76. ferent computer or programming language you will have to modify the program before you can run it The program can be used to calibrate all Electronic Load models You must specify the address of the Electronic Load that you are calibrating as shown in line 10 The program assumes address 705 Line 20 specifies channel 1 which is the channel number used by all Single Input Electronic Load models You must make the variable assignments for the model that you are calibrating in lines 40 through 90 Refer to table 6 2 for the values that apply to the model you are calibrating Do not change the last value Flag in lines 40 50 70 80 and 90 When the program is run it will stop at appropriate places and prompt you to set the power supply according to Table 6 2 enter your measured values into the computer and verify that the values are within specifications Calibration 77 Table 6 2 Calibration Information Ranges and Calibration Points High Current Range High Current Offset Low Current Range Low Current Offset Voltage Range Voltage Hi point Voltage Lo point Low Resistance Range Low Resistance Hi point Low Resistance Lo point Middle Resistance Range Middle Resistance Hi point Middle Resistance Lo point High Resistance Range High Resistance Hi point High Resistance Lo point 78 Calibration Variables Hi curr rng Hi offset Lo curr rng Lo curr offset N A Volt hipt Volt lopt Lo res rng Lo res hipt L
77. g blue shift key shifted You can change the Electronic Load s settings as required and then return to the settings stored in register 2 by pressing Enter 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 The main advantage in using internal registers 1 through 6 is that it simplifies the repetitive programming of different settings The Save key can be used in conjunction with the Input on off key to store settings while the input is off The Recall key can be used at a later time to recall desired settings while the input is turned on 62 Local Operation Table 4 6 Factory Default Settings Function Setting 6060B 6063B Input on off on on Short on off off off CURR level 0A 0A CURR transient level 0A 0A CURR slew rate 1 A us 0 83 A us CURR range 60A 10A CURR protection level 612 A 102 CURR protection delay 15s 15s CURR protection on off off off VOLT level 60 V 240 V VOLT transient level 60 V 240 V VOLT slew rate 5 V us 2 V us RES level 1000 Q 2400 Q RES transient level 1000 Q 24000 Q RES range 1000 Q 24000 Mode CC CC Transient Operation off off Frequency 1 kHz 1 kHz Duty Cycle 50 50 Transient mode continuous continuous
78. ge TRANSIENT VOLTAGE LEVEL Resolution Temperature Coefficient CURRENT READBACK Resolution Temperature Coefficient 6060B 1 6 mA 16 mA 100 ppm C 5 mA C both ranges 0 27 mQ 0 27 mS 0 027 mS 800 ppm C 0 4 mQ C 300 ppm C 0 6 m 8 9 16 mV 100 ppm C 5mV C 4 4 26 mA 260 mA 100 ppm C 7 mA PC 4 3 mQ 4 3 mS 0 4 mS 260 mV 150 ppm C 5 mA C 17 mA via GPIB 20 mA front panel 50 ppm C 5 mA C 6063B 0 26 mA 2 6 mA 150 ppm C 1 mA PC both ranges 6 mQ 0 011 mS 0 001 mS 300 ppm C 0 03 mS C 64 mV 120 ppm C 10mV C 4 800 ppm C 10 marc 4 4mA 43 mA 180 ppm C 1 2 mA C 0 18 mS 0 018 mS 1 0V 100 mQ 120 ppm C 10 mA C 27 mA via GPIB 10 mA front panel 100 ppm C 1 mA C General Information 13 Table 1 2 Supplemental Characteristics continued VOLTAGE READBACK Resolution Temperature Coefficient Maximum Readback Capability EXTERNAL ANALOG PROGRAMMING Bandwidth Accuracy Low Current Range High Current Range Voltage Range Temperature Coefficient Current Range Voltage Range EXTERNAL CURRENT MONITOR 0 TO 10 V Accuracy Temperature Coefficient referenced to Analog Common EXTERNAL VOLTAGE MONITOR 0 TO 10 V Accuracy Temperature Coefficient referenced to Analog Common MAXIMUM INPUT LEVELS Current Voltage programmable to lower limits DC
79. ge See Appendix A for considerations regarding high resistance applications Ranges The resistance values can be programmed in a low middle or high range The valid CR values that can be programmed are listed in Table 4 3 along with the applicable front panel key and display identifier Note that all resistance levels are programmed in ohms and the slew rate is in amps microsecond or volts microsecond depending upon the resistance range Table 4 3 CR Programming Ranges Function Key Display Range of Values 6060B 6063B Set Range R RNG value Low range 20or X1 20and lt 24 Middle range gt 1 lt 1000 gt 24 or 24000 High range gt 1000 or lt 10000 gt 24000 or lt 240000 Set Main Level RES RES value see Note 1 Low range 0 033 to 1 0000 0 200 to 24 000 Middle range 1 0000 to 1000 0 24 000 to 24000 High range 10 000 to 10000 240 000 to 240000 Set Slew Rate Low range shifted V SLW value see Note 2 Middle or High range C SLW value Set Transient Level Tran Level R TLV value see Notes and 3 Low range 0 033 to 1 0000 0 200 to 24 000 Middle range 1 0000 to 1000 0 24 000 to 24000 High range 10 000 to 10000 240 000 to 240000 Notes resistance in the low range 1 In the middle and high ranges the resolution of the main level and the transient level degrades as higher values are entered The value of resistance displayed will be the closest one to the value entered A simi
80. ged to Agilent AII references to HP IB have been changed to GPIB 9 20 04 The Declaration of Conformity has been updated 5 27 09 A URL has been added to the declaration page to obtain the latest declaration of conformity
81. gered Operation rete niter iei RP ERIT etg erra E E T Ferret 27 Slew Rate and Minimum Transition 27 Input Current Voltage and Power Measurement sess eene enne 28 Short a L S u a eint A 29 Input On off onn eeheet oerte pp nter OR ORT D eine pp 30 Saving and Recalling Settings serioen onenian eed te sitne p o ted eH Ee er 30 Reading Remote Programming Errors eene eerte trennen trennen 30 Status Reporting cu nene eere eae edere eee ete ee dee teeth 30 Protection Features ee rte te De Dt ri eet ER EE CER CCS Ee Petr Ehe 31 Resetting Eatched Protection eoi ee Noten gen RE RENE UI ONU GERE RR 31 Overvolt ge k a hu a RU e REUS Oe t etc ee dien etis 31 Overcurrent ROREM UBI dese Ip RARO 31 OV GLPO Wer PEE CR uem 32 Overtempetatufe s ice eet rete tee rep caus eet o a di ied gen 32 Reverse Voltage 2 eg EEUU ERU IEEE Ion qe spb cus repe een pe ER TE ENSURE 32 Control Connector noue RUIN REIR 32 Remote 32 Monitor OUtpUts eR Cate pto teta tre Reto reed t 33 External Programming 33 Fals sss Get ak eS E a A ee ee ete I ea eleva et nM 33 Port On Off EE meh pO De ot peg PUR 34 Ins
82. gled transient operation dece e O eben rtr eret 29 transient current level 2 ntose unde oe e etre OM afe ER ORE 23 transient OperatiOn ye ete eo t e pe mo pei duit b aet e dba dee ie 26 62 transient resistance ettet rues 25 transient voltage level i one nee deem eei meh lee eine 26 transition 29 e eee i 44 triggered current level a a a bk eat SA i e REN 23 triggered operation uyo s vereda o t tee RAT 29 triggered resistance deyel u a n n a qaa Shu ehh ERE 24 t gsered Voltage level f retiro eec ace ea et diea i peu dier ede peior peg 26 V 22 EEUU 55 w Np EM M ERE 65 NATURAE LE 47 Z zero voltloading rueda eed ite pe Hbri E 46 92 Index 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 a
83. hm typ 0 20 ohm 0 10 ohm typ PROGRAMMABLE OPEN CIRCUIT 20 k typical 80 k typical DRIFT STABILITY Over an 8 hour interval Current 0 0396 10 mA 0 03 15 mA Voltage 0 01 10 mV 0 01 20 mV With unit on 100 A 20 A With unit off 40 A 10A GPIB PROGRAMMING COMMAND PROCESSING TIME Typical time required for a GPIB command to be processed by the Electronic Load 70 ms GPIB CAPABILITIES REVERSE CURRENT CAPACITY SHI T6 L4 SRI DTI WEIGHT 6 12 kg 13 5 Ib net 8 16 kg 18 Ib shipping DIMENSIONS Width 425 5 mm 16 75 in Height 88 1 mm 3 5 in Depth 346 mm 13 6 in not including 50 mm for binding posts General Information 17 Operation Overview Introduction The Electronic Load is used for design manufacturing and evaluation of dc power supplies batteries and power components The primary operating features of the Electronic Load are constant current CC mode constant voltage CV mode or constant resistance CR mode The input can also be turned on or off open circuit or short circuited Other features include a built in GPIB interface and a built in pulse generator Pulse mode allows dynamic testing of power supplies and components without giving the device under test time to heat up This flexible mode provides three triggering methods allowing synchronization with a wide variety of events A Save Recall feature allows you to save u
84. ic Load s address is 05 Series 300 computers have a GPIB interface select code which is 7 Only one instrument connected to the interface can have address 05 Thus the complete GPIB address assumed in the upcoming programming examples is 705 You may modify the examples to have any GPIB address Remote Operation 65 Sending A Remote Command To send the Electronic Load a remote command combine your computer s output statement with the GPIB interface select code the GPIB device Electronic Load address and finally the Electronic Load s HPSL command For example to set the input current of a previously specified channel to 10 amps send OUTPUT 705 CURR 10 BASIC Statement GPIB Interface Select Code GPIB Device Address HPSL Command Input Current Value Getting Data Back The Electronic Load is capable of reading back the values of parameter settings as well as its actual input voltage and current or computed input power It can also return information relating to its internal operation and instrument identification In order to read back the desired information you must send the appropriate query to the Electronic Load For example the query MEAS CURR asks the Electronic Load to measure the actual input current at the INPUT binding posts Refer to the Agilent Electronic Loads Programming Reference Guide for complete details on using queries The Electronic Load stores its response to the query in an output buffer which will h
85. iohms low range or millisiemens middle or high ranges and are less than 196 of full scale In the two higher ranges of CR mode the constant conductance ranges the effect on the programmed resistance value is not linear over the resistance range because resistance is the reciprocal of conductance Also because lt G the effect of an offset in current I on conductance G is greater at low input voltages and less for large input voltages The electronic load designs are optimized for high current applications Therefore the effects of offsets are more pronounced at high resistance very low current values This may not represent a problem in typical applications such as those in which the load is used to test a power supply For example a 5 volt power supply being tested at 1 amp will require a load resistance of 5 ohms which is equivalent to 0 2 siemens The worst case offset of 0 008 siemens produces a resistance of between 4 8 ohms and 5 2 ohms which represents a 4 error By contrast a 10 000 ohm load connected to a 60 volt power supply will draw only 6 milliamps Electronic loads are not designed to regulate such small currents Considerations For Operating In Constant Resistance Mode 87 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 p
86. ion time This is shown in Figure 2 8 for the twelve programmable slew rates in current mode operation The actual transition time will be either the total slew time transition divided by slew rate or the minimum transition time whichever is longer In voltage mode all minimum transition times are based on a low capacitance current source These transition times are affected by capacitive loading of the inputs For example a capacitance of 2 2 microfarads increases the 85 microsecond minimum transition time shown in the specifications table to 110 microseconds Therefore no graph is provided for minimum transition time and slew rate in voltage mode operation In resistance mode the low resistance range uses the slew rate that has been programmed for voltage mode The middle resistance range uses the slew rate that has been programmed for the high current range The high resistance range uses the slew rate that has been programmed for the low current range Input Current Voltage and Power Measurement Each load s input current voltage and power can be measured at the front panel Meter 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 With remote control in effect a load may be instructed to measure its dc input voltage current or power by
87. ions FIRE HAZARD To satisfy safety requirements load wires must be heavy enough not to overheat WARNING while carrying the short circuit output current of the device connected to the Electronic Load Refer to Table 3 1 for the ampere capacity of various stranded wire sizes Input connections are made to the and binding posts on the panel Input connections can also be made to the optional front panel binding posts A major consideration in making input connections is the wire size The minimum wire size required to prevent overheating may not be large enough to maintain good regulation It is recommended that stranded copper wires be used The wires should be large enough to limit the voltage drop to no more than 0 5 V per lead Table 3 2 gives the maximum load lead length to limit the voltage drop to the specified limit Local Sense Connections Figure 3 11 illustrates a typical setup with Electronic Load connected for constant current or constant resistance operation Local sensing is used in applications where lead lengths are relatively short or where load regulation is not critical The sense switch must be set to LCL Load leads should be bundled or tie wrapped together to minimize inductance Remote Sense Connections Figure 3 12 illustrates a typical setup with Electronic Load connected for remote sense operation The remote sense terminals of Electronic Load are connected to the output of the power supply Remote sensing com
88. it is exceeded The protection limit can only be programmed via the GPIB It is turned on off using the CURR PROT STATE ONIOFF command The software current limit level in amps is set using the CURR PROT command A programmable delay in seconds before trip is also provided Operation Overview 31 If the software overcurrent limit is exceeded and persists beyond the specified delay time the input is turned off Also for these conditions the OC and PS protection shutdown status register bits are set and will remain set until the OC condition is removed and the bits are reset as previously described Overpower Nominal Power Limit The nominal power limit boundary is set by software that monitors the input current and voltage If the input power exceeds the nominal power limit the load sets the overpower status bit which will reset if the overpower condition ceases If the overpower condition persists for 50 ms the input turns off and the OP and PS status bits are both latched on The input remains off and the OP and PS status bits remain set until protection clear occurs Of course if the overpower condition is not corrected the input will turn off again Overtemperature The Electronic Load has an overtemperature OT protection circuit that turns off the input if the internal temperature exceeds safe limits If the OT circuit activates the OT and PS status register bits are set and will remain set until they are reset If the OT cond
89. ition still exists when the reset is executed the input will remain off You must wait until the load cools down before you can reset the OT circuit The fan will continue to operate to cool the unit as quickly as possible Reverse Voltage CAUTION This feature protects the Electronic Load in case the input dc voltage lines are connected with the wrong polarity If a reverse voltage RV condition is detected turn off power to the dc source and the load and make the correct connections The Electronic Load conducts reverse current when the polarity of the DC source connection is incorrect The maximum safe reverse current is specified in Table 1 1 The reverse voltage RV and voltage fault VF bits in the status register are set when reverse voltage is applied When the reverse voltage is removed the RV bit is cleared However the VF bit remains set until it is reset As previously described the Fault output signal at the control connector tracks the state of the VF bit The Fault signal can be used to control an external relay in order to disconnect the load from the dc source if an RV condition occurs Control Connector The Electronic Load has a 10 pin connector mounted on its rear panel The connector signals are described in the following paragraphs See Chapter 3 for connection details Remote Sensing The remote sensing inputs S and S can be used in CV or CR modes By eliminating the effect of the inevitable voltage
90. key To change the mode of operation from CC to CR first press RES which changes the display to MODE RES Now to activate the CR mode press As soon as the Enter key is pressed the CR annunciator goes on the resistance settings affect the input provided that the input is turned on and the display returns to the metering mode Note The Range Tran Level and Slew shifted Tran Level keys are common to the CC CR and CV functions These keys become associated with a particular function when you press the applicable function key CURR RES or VOLT If you do not select a function they are associated with the function that is presently active Setting CC Values The CC values are programmed by pressing the applicable FUNCTION keys and setting the desired values using the ENTRY keys The display identifies the selected function for example C SLW identifies current slew rate Ranges The CC values can be programmed in either a low range or a high range The valid CC values that can be programmed are listed in Table 4 2 along with the applicable front panel key and display identifier Note that all current levels are programmed in amps and current slew rates are programmed in amps microsecond Table 4 2 CC Programming Ranges Function Key Display Range of Values C RNG value Set Range Low A Range High Range Set Main Level Low Range High Range CURR value UR gt Set Slew Rate
91. lar effect will occur with the and keys Refer to Appendix A for considerations regarding high resistance applications 2 In the low resistance range the resistance slew rate is programmed in volts microsecond instead of in ohms microsecond Whatever value is programmed for the voltage slew rate see Setting CV Values is also used for In the middle and high ranges the resistance slew rate is programmed in amps microsecond Whatever value is programmed for the current slew rate see Setting CC Values is also used for resistance in either the middle or high ranges 3 In the low range the transient resistance level must be set to a higher value than the main resistance value In the middle and high ranges the transient resistance level must be set to a lower value than the main resistance value 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 6060B 300 Watt Electronic Load the present range is 1 to 1 ohms R RNG 1000 0 and the present settings are Local Operation 57 RES 50 000 main level is 50 ohms 40 000 transient level is 40 ohms C SLW 50000 slew rate is 0 5 A Us 1 to 1 k ohms range uses the CC slew rate setting If you now select the low range R RNG 1 0000 the settings will automatically be changed to fit into the new range as follows RES 1 0000 main l
92. modes the total amount of change is determined by the selected range The protection features are described briefly in Chapter 2 Operation Overview in this guide When programming the Electronic Load remotely you can use the 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 Note If the input voltage exceeds the maximum measurement capability of the Electronic Load an overload OVLD condition will occur This will cause the front panel display to change from indicating the volts amps values or the computed power value to indicating OVLD Using The Function Keys Most of an Electronic Load s functions can be programmed using these keys Figure 4 2 is a flow chart that shows a recommended programming sequence Note that the sequence includes turning the input off before you program any values This is a good practice because it insures that there is no input current while you are setting up your test program Programming is accomplished by selecting a mode of operation CC CR or CV and setting the desired values for range if applicable the main operating level and the slew rate If transient operation is desired set the applicable transient level make the desired frequency and duty cycle settings and turn transient operation on The settings you make will take effect at the input as soon
93. n the rear panel see Figure 3 2 Make sure that the factory check mark corresponds to your nominal line voltage Skip this procedure if the label is correctly marked CY UNE FUSE RATING 100 0 5 60VA 120v 250V MAX E 220V 0 254 90 60 240v 250 Hz Figure 3 2 Line Label With the unit off disconnect the power cord and remove the four cover screws M5 Use a number 2 Pozidriv Locate the voltage select switches 8552 S553 in the unit see Figure 3 3 Refer to the drawing on the PC board next to the switches and set the switches to the proper voltage Replace the cover and mark the correct voltage on the rear panel label Check the rating of the line fuse and replace it with the correct fuse if necessary see next step The line fuse is located below the ac line receptacle see Figure 3 4 With the power cord removed use a small screwdriver to extract the fuseholder from under the ac socket Replace the fuse with the appropriate type as indicated below These are time delay fuses D EQUES 36 Installation Line Voltage Fuse Agilent Part No 100 120 Vac 0 5 AT 2110 0803 220 240 Vac 0 25 AT 2110 0817 7 Re install fuse holder and connect the line cord siia SWITCH SETTINGS 2 120 228 240 E r b 553 555 e F RECEPTACLE Figure
94. nd ask for a test and measurement sales representative United States Agilent Technologies Test and Measurement Call Center P O Box 4026 Englewood CO 80155 4026 tel 1 800 452 4844 Canada Agilent Technologies Canada Inc 5150 Spectrum Way Mississauga Ontario L4W 5G1 tel 1 877 894 4414 Europe Agilent Technologies Test amp Measurement European Marketing Organisation P O Box 999 1180 AZ Amstelveen The Netherlands tel 31 20 547 9999 Japan Agilent Technologies Japan Ltd Measurement Assistance Center 9 1 Takakura Cho Hachioji Shi Tokyo 192 8510 Japan tel 81 426 56 7832 fax 81 426 56 7840 Technical data is subject to change Latin America Agilent Technologies Latin American Region Headquarters 5200 Blue Lagoon Drive Suite 950 Miami Florida 33126 U S A tel 305 267 4245 fax 305 267 4286 Australia New Zealand Agilent Technologies Australia Pty Ltd 347 Burwood Highway Forest Hill Victoria 3131 tel 1 800 629 485 Australia fax 61 3 9272 0749 tel 0 800 738 378 New Zealand fax 64 4 802 6881 Asia Pacific Agilent Technologies 24 F Cityplaza One 1111 King s Road Taikoo Shing Hong Kong tel 852 3197 7777 fax 852 2506 9284 Agilent Sales and Support Office 93 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 chan
95. nic Load receives a command via the GPIB A built in GPIB interface and HPSL compatible commands allow control and readback of all functions when the Electronic Load is used in computer controlled applications With remote control in effect only the computer can control the Electronic Load the front panel keypad has no effect You can however still use the front panel display to view the input voltage and current readings You can return the Electronic Load to local control from remote control by pressing Local This will return the Electronic Load to local control unless the local lockout command has been received from the GPIB computer Details of local operation are covered in Chapter 4 and fundamentals of remote programming are given in Chapter 5 Complete HPSL programming details are given in the Programming Reference Guide The remaining paragraphs in this chapter describe the operating modes transient operation protection features and other operating features of the Electronic Load Programmable Features Modes of Operation The three modes of operation are e constant current CC e constant voltage CV e constant resistance CR When programmed to a mode the Electronic Load 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 load s input is disabled for approximately 6 milliseconds non conducting state before the new mode is ena
96. nit for service attach a tag identifying the owner and model number Also include a brief description of the problem In addition to this manual check that the following items have been received with your Electronic Load Power Cord Your Electronic Load was shipped with a power cord for the type of outlet used at your location If the appropriate cord was not included refer to Figure 3 1 for the part number and order option for your type of cord Contact your nearest Agilent Sales and Service Office to obtain the correct cord Refer to Check Line Voltage to check the line voltage selection and fuse type Quick Disconnect A 10 pin mating plug for the control connector and a 4 pin mating plug for the trigger connector Mating Plugs are shipped with the Electronic Load These mating plugs are discussed later in this chapter Programming This guide enables you to use HPSL commands to remotely control your Electronic Load from a Reference Guide controller using the HPSL programming language Change Sheet Change sheets may be included Make corrections in the manual accordingly BOP FOO Option 900 912 917 Agilent 8120 1351 8120 1369 8120 1689 8120 1378 8120 0698 8120 2104 8120 2956 8120 4211 Part No L Line or Active Conductor also called live or hot N Neutral or identified Conductor E Earth or Safety Ground Figure 3 1 Power Cord Configurations Installation 35 Location and Cooling Table 1 1 gives th
97. o res lopt Mid res rng Mid res hipt Mid res lopt Hi res rng Hi res hipt Hi res lopt Variable Values 60 0 0282 6 0 0197 N A 60 2 7 1 1 04 6060B Power Supply Settings 5 V 61 A 5 61 V 5 15 V 10 9 A 10 9 V 15 A 60 V 6 A Current Shunt 100A 15A N A 15A 15A Variable Values 10 0 0048 1 0 0032 N A 240 6063B Power Supply Settings 25 V 10 5 A 25 2 246 V 0 6 60 V 1 8 A 43 6 V 4 A 240 V 2 A Current Shunt 15A 15A N A 15A 15A 15A HIGH RANGE C START D mum TURN CAL MODE ON CAL 1 OR CAL ON SELECT CURRENT MODE MODE CURR Y MEASURE CURRENT ACROSS SHUNT ENTER VALUE IN AMPS IF HIGH RANGE CAL LEV HIGH Measurement High current offset IF LOW RANGE CAL LEV LOW Measurement Low current offset gt HIGH RANGE LOW RANGE SEND VALUE IN AMPS TO READ BACK CAL MEAS LOW lt NRf gt F 9 SELECT HIGH OR LOW RANGE CURR RANG lt Hi_curr_rng gt OR CURR RANG lt Lo_curr_rng gt SEE TABLE 6 2 SET DC POWER SUPPLY AND CONNECT SHUNT FOR HIGH OR LOW RANGE CALIBRATION SEE TABLE 6 2 SET LOW CAL POINT 5 OF CURRENT RANGE MEASURE CURRENT ACROSS SHUNT ENTER VALUE IN AMPS CAL LEV LOW lt NRf gt SET HIGH CAL POINT 85 OF CURRENT RANGE Y CHECK THAT THE POWER SUPPLY IS IN CV
98. oad Reads the computed power level into variable A in the computer Displays the computed power level on the computer s display Continuous Transient Operation Example This example sets the CC levels and programs the slew frequency and duty cycle parameters for continuous transient operation Line 10 Line 20 Line 30 Line 40 Line 50 Line 60 Line 70 10 OUTPUT 705 INPUT OFF 20 OUTPUT 705 MODE CURR 30 OUTPUT 705 CURR 5 40 OUTPUT 705 CURR TLEV 1 SLEW 2500 50 OUTPUT 705 TRAN MODE CONT FREQ 5000 DCYC 40 60 OUTPUT 705 TRAN ON 70 OUTPUT 705 INPUT ON 80 END Turns off Electronic Load input Selects the CC mode Sets the main current level to 5 A Sets the transient current level to 1 A and the slew rate to 2500 A s or the closest slew rate step to this value depending upon the model being programmed Selects continuous transient operation sets the transient generator frequency to 5 kHz and sets the duty cycle to 40 Turns on the transient generator Turns on Electronic Load input Pulsed Transient Operation Example This example sets the CR levels selects the bus as the trigger source sets the fastest slew rate programs a pulse width of millisecond for pulsed transient operation 10 OUTPUT 705 INPUT OFF 20 OUTPUT 705 MODE RES 30 OUTPUT 705 RES 10 40 OUTPUT 705 RES TLEV 5 50 OUTPUT 705 TRIG SOUR BUS 60 OUTPUT 705 CURR SLEW 5000000 70 OUTPUT 705 TRAN MODE PU
99. ol by pressing the Local key provided that the local lockout command has not been received from the GPIB controller With local control in effect you can use the front panel display to view the input voltage current values and the computed power value as well as certain fault and status conditions that may be present This is referred to as the metering mode The display can also be used to view programmed settings when certain SYSTEM and FUNCTION keys are pressed This is referred to as the programming mode You can return the display to the metering mode from the programming mode by pressing Meter Continually pressing the Meter key will cause the display to step through the following 52 Local Operation INPUT OFF if active SHORT ON Volts Amps input metering for example 9 99 0 99 Computed power value for example 9 0 WATTS Protection Features if any are active VF voltage fault OV overvoltage RV reverse voltage PS protection shutdown OC overcurrent OP overpower OT overtemperature If the display is metering the input voltage current or the computed power you can use the Input ENTRY keys to increase or decrease the actual input These keys simulate front panel control knobs Pressing will cause the main level current resistance or voltage of the active mode to increase while pressing will cause the main level to decrease You can continually press an Input key to speed up the changes In the CC and CR
100. old the information until it is read by the computer or is replaced with new information Use your computer s enter statement to read the response from the Electronic Load s output buffer The following example asks the Electronic Load its actual input current and then reads the response back to the computer 10 OUTPUT 705 MEAS CURR 20 ENTER 705 A 30 DISPA 40 END Line 10 Measures the actual input current Line 20 Reads the actual input current level back into variable A in the computer Line 30 Displays the input current value on the computer s display Remote Programming Commands The 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 All of these details are given in the Agilent Electronic Loads Programming Reference Guide The Electronic Load s major functions can be programmed using a relatively few number of these commands Figure 5 1 illustrates how to program these functions using the applicable HPSL commands Table 5 1 lists the programming ranges associated with each function as well as the applicable HPSL commands The factory default settings for each function are listed in Table 4 6 The remaining paragraphs in this chapter give a few simple programming examples to help you get starte
101. on iio to nee NO Le Ue tt dee t ote diea II RE te ates 55 OVELPOWEL cet eren Ln cde sal En n DI In METRE E d 34 55 OVertemperatute iicet ptr LR PR TR EE DERE ERE HERE TRIS h 34 55 OMA SC T 33 55 P Parallel conn ctions iu ettet etm ie o agente lieet Soper Shatter ieee 46 potrton off sii Nea o Rete ele ec M eUam 35 44 power cordons nan Un deese RE mnm ys Beis alee 37 iem pe 40 POWOL LIMIT CUTVES E M 22 programmable current protecti n a enne nennen een 69 protection features eR SEU RR UE ae ae ain Hae ear ee Ase 32 55 protection 5 D HH 55 EE 27 pulse wWidth Bead eii ee e Ie cie E E ote deceret noa cite Ue Dee doe eeu ea a S eus 27 pulsed transient operation u eee epe ee pete peret ere bte ib epp berti e peter Ete 27 73 Q 68 STATUS Het d een eu Rie EUR 32 R PACK mounting eoe Rete UE qu eia Ee e e EE RUE ERE RUNE UR E REL ERIT EUCH ATP UE EE 38 reading remote programming errors eeeeeeceeeceseceseceaeceaecsaecseecsese
102. ons continued DERATED CURRENT DETAIL VOLTS CONSTANT CURRENT MODE Ranges Low Range 0to6A OtolA High Range 0to60A Oto 10A Accuracy after 30 sec wait 0 1 75 mA 0 15 10 mA both ranges both ranges Regulation 10 mA both ranges 8 mA both ranges CONSTANT RESISTANCE MODE Ranges Low Range 0 033 to 1 Q 0 20 to 24 Q Middle Range 1 to 1000 Q 24 to 10 000 Q High Range 10 to I 0 000 Q 240 to 50 000 Q Accuracy Low Range 0 8 8 mO 0 8 200mQ with 2 6 A at input with 2 1 A at input Middle and High Ranges 0 3 8 mS 0 3 0 3 mS with gt 6 V at input with 224 Vatinput CONSTANT VOLTAGE MODE Range 0 to 60 V 0 to 240 V Accuracy 0 1 50 mv 0 12 120 mV Regulation 10 mV remote sense 10 mV remote sense 40 mV local sense 40 mV local sense TRANSIENT OPERATION Modes Continuous pulsed or toggled Continuous Mode Freq Range 0 25 Hz to 10 kHz Freq Accuracy 3 Duty Cycle Range 3 to 97 0 25 Hz to kHz 6 to 94 1 kHz to 10 kHz Duty Cycle Accuracy 6 of setting 2 Pulsed Mode Pulse Width 50 us 3 minimum 4 s 3 maximum General Information 11 Table 1 1 Specifications continued TRANSIENT CURRENT LEVEL Ranges Low Range High Range Accuracy Low Range High Range TRANSIENT RESISTANCE LEVEL Ranges Low Range Middle Range High Range Accuracy Low Range Middle Range High Range TRANSIENT VOLTAGE LEVEL Range
103. or the are programmed by pressing the applicable FUNCTION keys and setting the desired values using the ENTRY keys The display identifies the selected function for example V TLV identifies the transient voltage level Range The voltage values can only be programmed in one range The valid CV values are listed in Table 4 4 along with the applicable front panel key and display identifier All voltage levels are programmed in volts and the voltage slew rate is programmed in volts microsecond Table 4 4 CV Programming Ranges Function Key Display Range of Values 6060B 6063B Set Main Level VOLT VOLT value 0 000 to 60 000 0 000 to 240 000 Set Slew Rate V SLW value 0 0010 to 0 5000 V us Note 1 0 0040 to 2 000 V us shifted Set Transient Level Tran Level value 0 000 to 60 000 Note 2 0 000 to 240 00 Notes 1 There are 12 discrete steps within the voltage slew range Because of bandwidth limitations only 9 slew rate steps can be achieved see Table 1 1 Any slew rate can be programmed There are no upper and lower limits that would cause an error The Electronic Load automatically selects one of the 12 slew rates that is closest to the programmed value See Chapter 2 Operation Overview in this manual 2 The transient voltage level is meaningful only if transient operation is turned on The transient voltage level must be set to a higher value than the main voltage level See Transient Operation Exampl
104. p to 7 complete instrument setups one of which can be saved in non volatile memory so that it is recalled automatically at power on Also standard is GPIB readback of actual input voltage and current and extensive protection and status reporting capability The Electronic Load contains a fan whose speed automatically increases or decreases as the heatsink temperature rises and falls This reduces the overall noise level because the fan does not run at maximum speed at all times The input power rating curve for the Electronic Load is shown in Table 1 1 Refer to the extended power paragraphs in this section for a description of the power rating curves Note that regardless of the power rating input current is derated linearly from 2 volts down to 0 volts If your application requires a greater power or current capacity than one Electronic Load can provide Electronic Loads can be connected in parallel in CC or CR mode Front Panel Description The front panel includes a 12 character alphanumeric display 11 status indicators and three groups of keypads Ordinarily the alphanumeric display shows the input voltage and current By using the key you can sequentially display input power programming error codes and protection circuit status If any protection circuits are active that status will be displayed first when you use the key The alphanumeric display shows what function is being performed when you use the keypads The display also include
105. pensates for the voltage drop in applications that require long lead lengths It is only useful when Electronic Load is operating in CV or CR mode or when using voltage readback The sense switch must be set to RMT Load leads should be bundled or tie wrapped together to minimize inductance Table 3 1 Stranded Copper Wire Ampere Capacity Wire Size Ampacity Notes AWG Cross Section 1 Ratings for AWG sized wires derived from MIL W 5088B Area in mm Ratings for metric sized wires derived from IEC Publication 33 51 Ampacity of aluminum wire is approximately 84 of that listed for copper wire When two or more wires are bundled together ampacity for each wire must be reduced to the following percentages 2 conductors 9496 3 conductors 89 4 conductors 8396 5 conductors 7696 Maximum temperatures Ambient 50 C Conductor 105 C 44 Installation Parallel Connections Figure 3 13 illustrates how Electronic Loads can be paralleled for increased power dissipation Up to six Electronic Loads can be directly paralleled in CC or CR mode Units cannot be paralleled in CV mode Each Electronic Load will dissipate the power it has been programmed for For example if two Electronic Loads are connected in parallel with Electronic Load number 1 programmed for 10 A and module number 2 programmed for 20 A the total current drawn from the source is 30 A In Figure 3 13 all lead connections are terminated at the source Ea
106. ply s regulation and transient characteristics can be evaluated by monitoring the supply s output voltage under varying combinations of load levels frequency duty cycle and slew rate Transient operation can be turned on and off at the front panel key or via the GPIB TRAN ON and TRAN OFF commands Before you turn on transient operation you should set the desired mode of operation as well as all of the parameters associated with transient operation Transient operation may be used in the CC CR or CV modes and can be continuous pulsed or toggled Note that the pulsed or toggled operation cannot be programmed from the front panel 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 On Off key The two load levels in the transient operation are the previously described main level immediate or triggered and transient level for current resistance or voltage The rate at which the level changes is determined by the slew rate see slew rate descriptions for CV CR or CV mode as applicable In addition the frequency and duty cycle of the continuous pulse train are programmable The frequency can be set from 0 25 to 10000 Hz at the front panel FREQ and ENTR
107. r 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 have been read Pressing the key displays just the error number The SYST ERR query returns the error number and a short description of the error to the computer Refer to Chapter 6 in the Agilent Electronic Loads Programming Reference Guide Local programming errors generated by front panel operations are not put into the error list but are immediately put on the Electronic Load s front panel display e g OUT OF RANGE 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 will be reported Chapter 5 of the Agilent Electronic Loads Programming Reference Guide describes the status reporting capability in detail Note that for a Single Input Electronic Load the same information is available in both the channel status and questionable status registers 30 Operation Overview Protection Features The Electronic Load includes the following protection features Overvoltage Overcurrent hardware and software Overpower hardware and software Overtemperature Reverse Voltage The appropriate bits in the status registers are set when any of th
108. ractical in applications requiring a fixed resistive load The following examples illustrate the worst case error possibilities resulting from op amp offsets The examples are based on a 300 watt unit having 1 ohm 1 kilohm and 10 kilohm ranges These examples do not include the effects of gain errors on accuracy specified in percent Note Note that typical performance is far better than the worst case possibilities shown here Example 1 1 O range 0 033 Q to 1 Q The offset error for this range is specified as 8 milliohms Therefore if 1 ohm is programmed the actual resistance will be 10 0 008 0 992 to 1 008 Similarly if 0 033 ohms is programmed the actual resistance will be 0 033 Q 0 008 0 032 to 0 048 Q Example 2 1 range 1 to 1 or 1 S to 0 001 S Because this range is in effect a constant conductance range offset is specified in siemens 1 ohms Resistance however is programmed in ohms Therefore to compute the contribution of offset error to programmed value error the programmed value must be reciprocated first The offset is then applied to the programmed value in siemens and the result is once again reciprocated Note that 1 ohm equals 1 siemen and 1 kilohm equals 0 001 siemens Therefore the conductance 0 001 siemens at full scale resistance 1 kilohm is a very small percentage of scale conductance If 1 ohm is programmed the corresponding conductance value is 1 siemen The
109. rial of the binding post causing the part to fail INSERT WIRE HAND TIGHTEN NOTES 1 WIRE SIZE AWG 4 MAX 2 STRIP BACK INSULATION 13mm FOR AWG 6 OR 8 3 INSERT WIRES IN HOLE IN 8INDING POSTS 4 TIGHTEN TO 8 in Ibf 5 OBSERVE PROPER POLARITY WHEN CONNECTING LEADS TO SOURCE Figure 3 8 Input Binding Post Control Connector A ten pin terminal block TB301 connector and a quick disconnect mating plug RTB1 are provided for connecting remote sense leads external V I monitors an external programming input and external control lines see Figure 3 9 You must remove the safety cover before you can disconnect mating plug RTB1 Consistent with good engineering practice all leads connected to the control connector should be twisted and shielded to maintain the instrument s specified performance 3 45 56 maw jid _ SO Waaa T830 1 Lori o TIGHTEN SCREWS AER 23456738910 INSERT WIRES RTB AWG 14 28 P N 0360 2345 Figure 3 9 Control Connector Installation 41 S and S IM and VM pins 3 and 4 Common pin 5 Ext Prg pin 6 Pin7 Fit pin 8 Port pin 9 Common pin 10 Used to connect the remote sense leads to the power source Pin 1 connects the S signal and pin 2 connects the S signal Used to monitor the Electronic Load s input current and voltage A 0 V to 10 V signal at the appropriate pin
110. rned to a service facility designated by Agilent Technologies Customer shall prepay shipping charges by and shall pay all duty and taxes for products returned to Agilent Technologies for warranty service Except for products returned to Customer from another country Agilent Technologies shall pay for return of products to Customer Warranty services outside the country of initial purchase are included in Agilent Technologies product price only if Customer pays Agilent Technologies international prices defined as destination local currency price or U S or Geneva 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 Inc LIMITATION OF WARRANTY The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by the Customer Customer supplied software or interfacing unauthorized modification or misuse operation outside of the environmental specifications for the product or improper site preparation and maintenance NO OTHER WARRANTY IS EXPRESSED OR IMPLIED AGILENT TECHNOLOGIES SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE EXCLUSIVE REMEDIES THE REMEDIES PROVIDED HEREIN ARE THE CUSTOMER S SOLE AND EXCLUSIVE REMEDIES AGILENT TECHNOLOGIES SHALL NOT BE LIAB
111. rs the actual transient level value measured by an external instrument that corresponds to the present transient setting The low level value of the main DAC is used as the low point for the transient calibration Note that for the middle and high resistance ranges the transient level is LOWER than the high level of the main DAC CALibration MEASure HIGH lt NRf gt Enters the actual high level value measured by an external instrument that corresponds to the present high level setting The input signal must remain applied to the Electronic Load while this command is executed because the unit takes a reading with the readback DAC to calibrate itself An error is generated if the high level value is not greater than the low level value Both high and low CAL MEAS commands must be sent before the constants are recalculated and stored in RAM CALibration MEASure LOW lt NRf gt Enters the actual low level value measured by an external instrument that corresponds to the present low level setting The input signal must remain applied to the Electronic Load while this command is executed because the unit takes a reading with the readback DAC to calibrate itself An error is generated if the low level value is not less than the high level value Both high and low CAL MEAS commands must be sent before the constants are recalculated and stored in RAM 76 Calibration CALibration SAVE Writes the present calibration constants into the EEPROM This command
112. s One shortcut that is used in this calibration procedure is that the readback DAC is calibrated for current readback after the high current range calibration and calibrated for voltage readback after the voltage range calibration This is because the readback setups are the same as the setups for the high current and voltage ranges Another shortcut is that the same values are used to calibrate the main DAC as well as the readback DAC You may wish to use different values to calibrate the readback DAC to optimize accuracy It is not necessary to calibrate the current readback for the low current range or for reading back resistance values This is because the high current readback calibration takes care of the low current range The resistance values that are readback are calculated based on the voltage at the input terminals and the current through the internal current shunt resistor If the readback DAC has been calibrated for voltage and current readback resistance readback will be accurate Note Remember to turn the unit off after you have saved the new calibration constants When the unit is turned on again the new calibration constants are used to recalculate the software OP and OC limits These limits are not updated until power is cycled Example Program The 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 dif
113. s 11 annunciators that point to the 11 status labels printed on the front panel These are Constant Current Constant Resistance Constant Voltage Transient Unregulated Protection Error Shift Remote Address and Service ReQuest Three keys perform two functions with the alternative function labeled in blue above the key The alternative function is selected by first pressing the blue shift key which turns on the Shift annunciator and enables the alternative function Remote Programming Commands sent to the Electronic Load via GPIB are decoded by the primary microprocessor which detects syntax and range errors The primary processor also prescales data and maintains the status registers Three commands have aliases for compatibility with other HPSL instruments MODE can also be called FUNCtion INPut can also be called OUTPut and INSTrument can also be called CHANnel OUTPut and INSTrument would typically be used if you want your program to refer to the Electronic Load in terms of the device or instrument under test When using the CHANnel command remember that the Electronic Load is always channel 1 Operation Overview 19 Local Remote Control Local front panel control is in effect immediately after power is applied The front panel keypad and display allow manual control when the Electronic Load is used in bench test applications Remote computer control goes into effect front panel Rmt annunciator is on as soon as the Electro
114. s to the main level again at the rate specified by the slew setting and stays there for the remainder of the period prescribed by the frequency setting Pulsed Transient Operation Pulsed transient operation is similar to continuous operation with the following exceptions a In order to get a pulse an explicit trigger is required The trigger can be an external trigger signal received via the TRIGGER input on the rear panel the GPIB GET function the TRG common HPSL command or the TRIG subsystem HPSL command 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 c There may be a delay between the generation of the trigger and the appearance of the pulse at the load s input For pulse widths of 17 ms or greater delay is less than 1 6 of the pulse width For pulse widths of less than 17 ms delay is less than 4 of the pulse width In this example assume that the CC mode is active the slew rate is at the factory default setting maximum rate an external trigger input is connected to the Electronic Load s rear panel and the applicable transient operation parameters have been set as follows Operation Overview 25 HPSL Command Description TRIG
115. see the RES setting being incremented or decremented one step at a time each time you press the applicable Input key The values are entered automatically you don t press the Enter key Remember if the CR mode is active the incremented or decremented values will immediately change the actual input 3 Set Slew Rate a First press the blue shift key and note that the Shift annunciator goes on Now press shifted Tran Level key to determine the present slew setting Note that the display indicates V SLW and the maximum voltage slew rate The Electronic Load automatically selects the voltage slew rate when the low resistance range is selected b Setthe slew rate to 0 25 V us by pressing J 3 5 c Press CJ and again and check that the display indicates V SLW 0 2500 or the closest slew rate step to this value for the particular model being programmed 58 Local Operation 4 Set Transient Level The transient resistance level R TLV is meaningful only if transient operation described later is turned on a Setthe transient level to 0 8 ohm by pressing Enter Remember that in the low range the transient level must be set higher than the main level b Press again and note that the display indicates R TLV 0 8000 Note that you can use the Input ENTRY keys to increment and decrement the transient resistance level Operation is similar to that described for the main resistance level Setting CV Values The CV values f
116. sending the appropriate query command e g MEAS CURR The results will be read back when the load is addressed to talk Voltage and current measurements are performed with approximately 12 bit resolution of full scale ratings Power is computed from this information 28 Operation Overview Short On Off A load can simulate a short circuit at its input by turning the load on with full scale current The short circuit can be toggled on off at the front panel Short on off key or via the GPIB INPUT SHORT ONIOFF command The short on off change uses the slew rate setting of the active mode and range MINIMUM MAXIMUM TRANSITION TRANSITION TIME TIME ges pees es WAH ES oe i e nA cy gj inj gt T2ms 8 0ms n d 2 Z 6ms t 9 i pane 5 HH 3 2 5 7 t 3 Sip f SS o A 24ms 1 6 5 gt gt a4 xs Ebo 1 2ms ATIME t 4 2 1 BOOAs 1 600us r T av Tl 3204s it lal 240 45 16045 i i 8045 r 60us 52 45 4us 16 5 f Hm Gus 12 5 pi 59 1339 167 50 100 A CURRENT OF FULL SCALE Figure 2 8 Transition Times and Slew Rates The actual value of the electronic short is dependent on the mode and range that are active when the shor
117. service personnel SAFETY SYMBOL DEFINITIONS Direct current Terminal for Line conductor on permanently installed equipment Alternating current i Caution risk of electric shock Both direct and alternating current Caution hot surface Three phase alternating current Caution refer to accompanying documents Earth ground terminal In position of a bi stable push control Protective earth ground terminal Out position of a bi stable push control ee EE a Terminal for Neutral conductor on O Off supply permanently installed equipment Terminal is at earth potential Used for Standby supply measurement and control circuits designed O Units with this symbol are not completely to be operated with one terminal at earth disconnected from ac mains when this switch is potential off To completely disconnect the unit from ac mains either disconnect the power cord or have a qualified electrician install an external switch Herstellerbescheinigung Diese Information steht im Zusammenhang mit den Anforderungen der Maschinenl minformationsverordnung vom 18 Januar 1991 Schalldruckpegel Lp 70 dB A Am Arbeitsplatz Normaler Betrieb Nach EN 27779 Typprufung Manufacturer s Declaration This statement is provided to comply with the requirements of the German Sound Emission Directive from 18 January 1991 Sound Pressure Lp 70 dB A At Operator Position Normal Operation According to EN
118. seseeeeeseeeseeeeesecssecssecssecseeeseseseseeeeeseeeeeeeeees 32 rear panel a vetri rir rr FREE RU etr s asnapa Ee ERE LR 42 recalling the factory default Values ent orte re texere E ente DERE PH Les 64 remote Control ipeton ee IAES 22 remote Sense CONMECHON r uy ta U n aS epe eec toit ee p N ee ES 45 48 RATOLESTI D IR 34 uir M Y 51 resetting latched protection eec m eR eR PRI UD E K duree tele due Rehd et Ine ee REESS 33 reverse Voltage cunas ROO eoe ede Rt ee tena Res 34 55 S saving and recalling settings de aie eet hal REPRE BU nen iin EPI debe 32 64 cm M D 40 SenSeSWILeR u 42 45 CC Valves d 57 Settme CR values ode Ee UU UOI pap EUROS 59 Setting CV Vales cn 61 settingthe mode OF operation IA it o cH iere 57 shorting th 1nput EL 63 SLEW rate u ehe Rp uec nn 24 25 26 29 Index 91 INDEX continued software current HII nett een tie aee tuii te p deri pereo d mede ti eee ieu dene dg 33 Status TEpOFtilig hae edocs ad coda ERE IRURE a ROSEO i E ORDEI gous iE eie gie e 32 55 systemiKeys i tiie Neale eee ISO Reemi ettet 52 63 T tog
119. signed to operate at a maximum relative humidity of 9546 and at altitudes of up to 2000 meters Refer to the specifications tables for the ac mains voltage requirements and ambient operating temperature range BEFORE APPLYING POWER Verify that the product is set to match the available line voltage and the correct fuse is installed GROUND THE INSTRUMENT This product is a Safety Class 1 instrument provided with a protective earth terminal To minimize shock hazard the instrument chassis and cabinet must be connected to an electrical ground The instrument must be connected to the ac power supply mains through a three conductor power cable with the third wire firmly connected to an electrical ground safety ground at the power outlet Any interruption of the protective grounding conductor or disconnection of the protective earth terminal will cause a potential shock hazard that could result in personal injury ATTENTION Un circuit de terre continu est essentiel en vue du fonctionnement s curitaire de l appareil Ne jamais mettre l appareil en marche lorsque le conducteur de mise la terre est d branch FUSES Only fuses with the required rated current voltage and specified type normal blow time delay etc should be used Do not use repaired fuses or short circuited fuseholders To do so could cause a shock or fire hazard DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE Do not operate the instrument in the presence of flammable g
120. sing As soon as the Enter key is pressed the Electronic Load will be set to its factory default values Note that the Electronic Load is also set to the factory default values when the RST common command is sent via the GPIB see the Programming Reference Guide If you also want the factory default settings to be the wake up settings you can recall them as described above and then press LL blue shift key shifted 0 Enter Now when power is turned off and on the Electronic Load will be set to the factory default settings 64 Local Operation Remote Operation Introduction Chapter 4 Local Operation described how to program the Electronic Load manually using the front panel keys This chapter describes the fundamentals of programming the Electronic Load remotely from a GPIB controller The similarities between local and remote programming will become apparent as you read this chapter The intent of this chapter is to help first time users quickly become familiar with operating their Electronic Load remotely from a GPIB controller Only the most commonly used HPSL commands will be discussed Programming examples given in this chapter use the HPSL commands in their simplest form abbreviated commands no optional key words etc Refer to the Agilent Electronic Loads Programming Reference Guide for a detailed description of all commands The Programming Guide includes a complete Language Dictionary as well as a quick ref
121. t is turned on In CV mode it is equivalent to programming zero volts In CC mode it is equivalent to programming full scale current for the present CC range In CR mode it is equivalent to programming the minimum resistance for the present resistance range Note that turning the short on in CV mode may cause the load to draw so much current that the software current limit operates which may turn the input off Turning the short circuit on does not affect the programmed settings and the input will return to the previously programmed values when the short is turned off CAUTION 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 Operation Overview 29 Input On Off A load s input can be toggled on off at the front panel Input on off key or via the GPIB INPUT ONIOFF command The input on off change does not use the slew rate setting so the input will change at the maximum slew rate Turning the input off zero current does not affect the programmed settings The input will return to the previously programmed values when the input is turned on again Note that the Input On Off command supersedes the mode commands and Short On Off command Saving and Recalling Settings The Electronic Load has internal registers in which settings mode
122. t when power is cycled Note that the Address setting is not affected by the Save and Recall functions described below Displaying Error Codes Remote programming errors are indicated when the Err annunciator is on To display the error code s first return to local control by pressing Local To display an error code press blue shift key shifted Errors are recorded in a list and are displayed in the order in which they occurred Each time the shifted Error key is pressed an error code is displayed Once an error is displayed it is removed from the error list ERROR 0 indicates there are no errors present and will be displayed when all errors in the list have been displayed 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 Saving and Recalling Settings The Electronic Load s settings mode input state current levels resistance levels etc can be saved and then recalled for use in various test setups The complete list of parameters that can be saved and recalled are the same parameters as listed in Table 4 6 The present settings of all parameters can be saved in a specified storage register 0 to 6 using the Save shifted Recall key Ata later time you can recall the settings from the specified register using the Recall key For example you can store the present settings in register 2 by pressin
123. tallation Introduction dI ue eS Pede ee usus 35 Inspection EE 35 Location and Cooling er nti asit A N eui ottenendo 36 Turn On Checko t 4 si ese heh ea IG a Om ORE dde aee iiem t 36 Check Line Voltage ee tese RE eles 36 Connect the Power Cord sesso bee eter me pp deter ette emet 38 Turn On Selftest etes edo eee eps 38 Power Test eise ene ee duele Eu Miet tr ES 37 Table of Contents continued Controller Connection e RR ee ree 39 GPIB COnDn6CIOf z ee eoe ie ede vee nes ere ete eet eite oed pesos 39 D EU UR IUE dues UI ERREUR ORO REISEN PIDE usia 40 Rear Panel Connectors and Switches seseesssssessseeseeeeee eene nennen nennen nennen nnne ens 40 Input Binding Posts oeste iet PR he Ore OP ERE ripae Eon cba PUR abo EEE EE ve haqayna 40 Control Connector 5 o tette ot eh tet pete d io e precio Rhee 41 Tigger Connector sette neo eter Petre ee PROIN Petre hist cud Poe ice ded noe Re eMe tege ies 43 Sense S WICH rei nieto ee erede eh ete eed 43 Application Connections einen ee p RH DOG OR 44 Wiring Considerations s iei dee e bee e p e p pite t pe eee 44 Local Sense Connections ot aei ERI RO betes REDE EORR EEO even conte 44 Remote Sense Connections iscrisse yiee er RE o aE
124. the values on the display for the specified function or selects the mode of operation and returns the front panel to the metering mode and These keys simulate front panel control knobs They can be used to change the main level or the transient level of the function shown on the display The new values are entered automatically Enter key is not used and they take effect as soon as they are displayed You can also use these keys to change the actual input level when the display is monitoring the input voltage current or the computed power Note that these keys have no effect on range slew frequency etc Local Control Overview In order to use the front panel keys to control the Electronic Load local control must be in effect Local control is in effect immediately after power is applied With local control in effect Rmt annunciator off the SYSTEM FUNCTION and ENTRY keys can be used to program the Electronic Load The power on wake up settings for all of the Electronic Load s functions can be the factory default values or other user selected values as described later in this chapter In the remote state front panel Rmt annunciator on the front panel keys will have no effect only the GPIB controller can program the Electronic Load You can still use the front panel display to view the input voltage and current readings while the remote state is in effect You can return the Electronic Load to local control from remote contr
125. tive if an overvoltage or reverse voltage occurs at the input as described in the Protection Features paragraphs 604 504 LOAD INPUT CURRENT VARIES INPUT 404 BETWEEN 14A amp 26A CURRENT EXT PROG SIGNAL Figure 2 9 External Programming Example Operation Overview 33 Port On Off Port is a general purpose output port that can be used to control an external device such as a relay for power supply test purposes The output is toggled on and off via the GPIB PORTO ON OFF command It cannot be controlled from the front panel The Port output signal is a TTL compatible signal that becomes active high level when the PORT command is programmed ON and becomes inactive low level when the PORT command is programmed OFF 34 Operation Overview Installation Introduction This chapter discusses how to install and make connections to the rear panel of your Electronic Load A turn on checkout procedure as well as application considerations for specific operating modes are also discussed Inspection When you receive your Electronic Load inspect it for any obvious damage that may have occurred during shipment If there is damage notify the carrier immediately and notify the nearest Agilent Sales Office Warranty information is printed on the inside front cover of this manual Save the shipping cartons and packing materials in case the unit must be returned to Agilent Technologies in the future If you return the u
126. to 5 000 000 A s 17 to 830 000 A s Set Transient Level CURR TLEV value Same as CC main level Set Triggered Level CURR TRIG value Same as CC main level 72 Remote Operation Table 5 1 Remote Programming Ranges continued HPSL Command Function Short Form Range of Values Constant Resistance CR Set Range RES RANG value 6060B 6063B Low Range gt 0or lt 1 9 gt lt 240 Middle Range gt 1 Q and lt KQ lt 24 Q and lt 24 High Range gt 1 and lt KQ gt 24 and lt 240 Set Main Level RES value Low Range 0 10 010240 Middle Range 1 Q to 1 kO 24 to 24 High Range 10 Q to 10 240 to 240 Set Slew Rate Low Range VOLT SLEW value Same as CV slew rate Middle High Range CURR SLEW value Same as CC slew rate Set Transient Level RES TLEV value Same as main CR level Set Triggered Level RES TRIG value Same as main CR level Constant Voltage CV 6060B 6063B Set Main Level VOLT value 0 to 60 V 0 to 240 V Set Slew Rate VOLT SLEW value 1000 to 5 000 000 V s 4000 to 2 000 000 V s Set Transient Level VOLT TLEV value Same as main CV level Set Triggered Level VOLT TRIG value Same as main CV level Transient Operation Set Frequency Set Duty Cycle Set Pulse Width Current Protection Set Current Level Set Delay Time value TRAN DCYC value TRAN TWID val
127. transition time increases when operating with input currents under 1 AM 6060B or 0 2 AM 6063B and decreases with input currents over 20 A 6060B or 2 A 6063B The following are typical values 25 tolerance Current Slew Rate Model 6060B Ac performance specified from 3 to 60 V Rate High Range Step Low Range Step Transition Time 1 1 A ms 0 1 A ms 8 0 ms 2 2 5 A ms 0 25 A ms 3 2 ms 3 5 A ms 0 5 A ms 1 6 ms 4 10 A ms 1 A ms 800 us 5 25 A ms 2 5 A ms 320 us 6 50 A ms 5 A ms 160 us 7 0 1 A us 10 A ms 80 us 8 0 25 A us 25 A ms 32 us 9 0 5 A us 50 A ms 16 us 10 1 A us 0 1 A us 12 us 11 2 5 Alus 0 25 A us 12 us 12 5 Alus 0 5 A us 12 us Model 6063B Ac performance specified from 3 to 240 V Rate High Range Step Low Range Step Transition Time 1 0 17 A ms 17 Als 8 0 ms 2 0 42 A ms 42 Als 3 2 ms 3 0 83 A ms 83 A s 1 6 ms 4 1 7 A ms 0 17 A ms 800 us 5 4 2 A ms 0 42 A ms 320 us 6 8 3 A ms 0 83 A ms 160 us 7 17 A ms 1 7 A ms 80 us 8 42 A ms 4 2 A ms 32 us 9 83 A ms 8 3 A ms 20 us 10 0 17 A us 17 A ms 20 us 11 0 42 A us 42 A ms 16 us 12 0 83 A us 83 A ms 16 us General Information 15 Table 1 2 Supplemental Characteristics continued Voltage Slew Rate 6060B 0 to 60V Rate Voltage Step Voltage Step 1 1 V ms 4 V ms 2 2 5 V ms 10 V ms 3 5 V ms 20 V ms 4 10 V ms 40 V ms 3 25 V ms 100 V ms 6 50 V ms 200 V ms 7 0 1 V us 0 4 V us 8 0 25 V us 1 V us 9 0 5 V us 2 V us Transition
128. tronic Load is designed to comply with the following safety and environmental requirements e 348 Safety requirements for electronic measuring apparatus e CSA 22 2 No 231 Electronic instruments and scientific apparatus for special use and applications e UL 1244 Electrical and electronic measuring and testing equipment Specifications Table 1 1 lists the specifications of the Single Input Electronic Loads Specifications indicate warranted performance in the 25 C x 5 C region of the total temperature range 0 to 55 C Table 1 2 lists the supplemental characteristics of the Single Input Electronic Loads Supplemental characteristics indicate nonwarranted typical performance and are intended to provide additional information by describing performance that has been determined by design or type testing Table 1 1 Specifications SPECIFICATIONS AC INPUT RATING Two internal switches permit operation from 100 120 220 or 240 Vac nominal lines Amplitude 13 to 6 nominal line voltage Frequency 48 to 63 Hz 6060B 6063B Current 0 to 60A 0to 10A Voltage 3 V to 60 V see derated 3 V to 240 V see derated current detail current detail Power 300 W at 40 C derated to 250 W at 40 C derated to x DC INPUT RATING OPERATING CHARACTERISTICS 225 W at 55 C 300 w CONTOUR QERATED CURRENT 30 60 AMPERES VOLTS 187 W at 55 C 10 General Information Table 1 1 Specificati
129. ue CURR PROT value CURR PROT DEL value 0 25 to 10000 Hz 3 to 9796 0 25 Hz to 1 kHz 6 94 1 kHz 10 kHz 0 00005 to 4 seconds 6060B 6063B 0to61 2A 0 to 10 2 A 0 to 60 seconds Can only be programmed remotely via the GPIB Remote Operation 73 Calibration Introduction This chapter describes the calibration procedures for the Electronic Load and gives a sample calibration program The Electronic Load should be calibrated annually or whenever certain repairs are made refer to the Service Manual Calibration is accomplished entirely in software by sending calibration constants to the Electronic Load via the GPIB This means that the Electronic Load can be calibrated without removing its cover or removing it from its cabinet if rack mounted There are three DACS in the Electronic Load that must be calibrated a main DAC a readback DAC and a transient level DAC Six ranges must be calibrated for both the main DAC and the transient DAC a voltage range a low resistance range a middle resistance range a high resistance range a low current range and a high current range The main DAC requires two operating points to be calibrated for each range a high point and a low point The transient DAC requires only the high operating point to be calibrated for each range it uses the same low operating point as the main DAC Note that the transient level for the middle and high resistance ranges is lower than the high le
130. vel If high current range wait for internal current shunt to stabilize Send measurement in amperes for high transient calibration point Turn transient mode off Voltage calibration subroutine Select channel and voltage mode Set high calibration point Send measurement in volts for high main calibration point Send measurement in volts for high readback calibration point Set low calibration point Send measurement in volts for low main calibration point Send measurement in volts for low readback calibration point Set low calibration point Select transient toggle mode and GPIB trigger source Turn transient mode on and set transient calibration point Trigger transient level Send measurement in volts for transient calibration point Turn transient mode off Resistance calibration subroutine Select channel resistance mode and range Set high calibration point Calculate and send measurement in ohms for high main calibration point Set low calibration point Calculate and send measurement in ohms for low main calibration point If middle and high range set high calibration point otherwise set low point Select transient toggle mode and GPIB trigger source Turn transient mode on If middle and high range set lower transient point otherwise set higher point Trigger transient level Calculate and send measurement in ohms for transient calibration point Turn transient mode off Calibration 85 Considerations For Operating In Constant
131. vel of the main DAC The readback DAC is only calibrated for the high current range and the voltage range It also requires two operating points to be calibrated for each range a high point and a low point For the sake of convenience you can use the same values to calibrate the main and the readback DAC but you could also use different values to optimize accuracy Note All calibration must be done when the Electronic Load is at room temperature Example Programs The example programs in this chapter are written using the Agilent BASIC Language If you are using an HP Series 200 300 computer simply type in the programs and run them At appropriate places in the program you will be prompted to measure and enter values into the computer and verify that the values are within specifications If you are using a different computer or programming language you will have to modify the programs before you can run them Equipment Required Table 6 1 lists the equipment required for calibration Note that less accurate and less expensive current shunts may be used than those listed but the accuracy to which current and resistance programming as well as readback can be checked must be reduced accordingly Figure 6 1 illustrates how the calibration equipment should be connected Table 6 1 Equipment Required for Calibration Equipment Characteristics Recommended Model Shunts 0 1 15 A 0 04 25 W Guildline 9230 15 0 01 100 A

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