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User Manual - Excalibur Engineering

1. RP PRIN stan EEE E ELDER E ee 74 Output SUDSyStem ee rente tei ien istum psi incen desee d tedio iid ein 74 amp SU a Peste E ote tiie 74 OUTP PROT as RP eta eS deca 74 OUTP PROT DEL nre hohen in ote Dette DURO Do Rt 75 i 7 2 teh ror o Eu ei e adu dte ute le nie eed p e res 75 SOUR CURR TRIG nett Rem ERE EUER Ute n dere etri EE rex en 75 SOUR EI eret e eee 76 SOUR CURR PROT erecti tette te ete Ria E sobs REOR UT E De RE ehe 76 SOURS CURR PROTIS TAT o teettn tnl ene doers 76 SOUR CURRSS AS ISC te tete tt eed Ie iei e e it ree 77 ISOUR CURR SAS teh Be nies bd eum 77 SOUR CURR TABLINAME nter EHE E IR SURE RR DERE EU 77 SOUR CURR TABL OFBS rete ep Naa org ee Been eg etd 77 RE e ERE onions RO UR De ERE re ENDS 77 SOUR VOLT es ei eae sie Hideo p tee Eee E du nella ete eed 78 SOUR VOLT TRIG netter rne ee EE P p eire RR EIER PET ee hp 78 ISOUR IVOET PRQY Leer temet terere eter it aen ret 79 SOUR VOLET SAS VQGC 5 teet edere
2. lt 25 ms Output is monotonic over entire rated voltage current temperature range Auto Parallel Configuration Up to three identical models Non volatile Savable States Memory Locations 5 0 through 4 Memory Write Cycles 40 000 typical Prestored state location 0 Unit wiring for 230 Vac 10 is identical to 240 Vac 13 6 Specifications and Application Information 97 Table A 2 Supplemental Characteristics for Agilent E4350B E4351B SAS continued INH FLT Characteristics Maximum ratings FLT Terminals 1 amp 2 INH Terminals 3 amp 4 16 5 Vdc between terminals 1 amp 2 3 amp 4 and from 1 or 2 to chassis ground Low level output current 1 25 mA max Low level output voltage 0 5 V max Low level input voltage 0 8 V max High level input voltage 2 V min Low level input current 1 mA Pulse width 100 us min Time delay 4 ms typical Digital I O Characteristics Digital OUT Port 0 1 2 open collector Digital IN Port 2 internal same as INH FLT Characteristics Output leakage 16V 0 1 mA ports 0 1 12 5 mA port 2 Output leakage 5V 0 1 mA ports 0 1 0 25 mA port 2 Low level output sink current 0 5 V 4mA Low level output sink current 1 V 50 mA Low level input current 0 4 V 1 25 mA Maximum ratings pull up High level input current 5 V 20 25 mA Low level input voltag
3. SOLAR ARRAY SIMULATOR system 1 Function gt VOLTS AMPS DE Local Output Voltag t na 1 I YF V on off Voltage EU l zip a A v Address euren CV CC Unr Dis OCP Prot Cal Shift Rmt Addr SRQ Recall OCP ov OLTAGE CURRENT lt t 1 2 Current O g 0 Figure 5 1 Front Panel Controls and Indicators Front Panel Operation 41 Table 5 1 Front Panel Controls and Indicators See Figure 5 1 Control or Function or Indication Indicator Display VOLTS Shows present output voltage of the Agilent SAS AMPS Shows present output current of the Agilent SAS Status Annunciators CV The Agilent SAS is in constant voltage mode Applies in Fixed mode only CC The Agilent SAS is in constant current mode Unr The Agilent SAS output is unregulated the output is neither CV or CC Dis The Agilent SAS output is disabled OCP The Fixed mode overcurrent protection OCP function is enabled Applies in Fixed mode only Prot A protection circuit has caused the Agilent SAS to shut down Press to determine the reason Err An error has been generated as a result of remote operation Press to display the error code Cal The Agilent SAS is in calibration mode Shift The shift key has been pressed Rmt The Agilent SAS is in the rem
4. a eae bep ie eee ee A es i breed 67 cates set sesh teeta otek sta epo RP 68 iid 68 WAT osi RR adusta di aged aUe aed EU 68 Description of Subsystem Commands essen neret nennen retener tenete entren 69 Calibration Commands ertet or gates ER ATE FUP ERE C SORGE RERO EIFE EO ISDEM URS 71 Display Subsystem sioe een tct bias iie i puteo E RU eie GREG EUR els 71 DISP AEE ue RR OI REOR REANO iie 71 DISE MODE 2 ote iene ties eee hele aie ees Beles sedate Qe 71 Measure Subsystem 25 nonet e bite tire DE Dis pere UR Re DRE 72 MEAS CURR 2 3 5 ente ene i p d i er pouf eie o E ders 72 MEXRS VOET eet RUBe T Dp dee e ed ue Mt 72 Memoty SubSyStem oe Ae dau eA d Redi 73 MEM COPBY TABL ntt EROR OF DE De PR Per PE te HUE PR es 73 aceite etienne iie a ee eee 73 MENMEDEL NAME e REB AUR 73 REPE ad inu a 73 MEM TABE CURR eene OR DH DDR ED REO TREE 73 MEM TABL VOET dp ete dee reote dedere predi pedes 73 MEM TABIE CURR POUN eret e ere ERE oe rb Ter EIE EEES 74 MEM TABIZVOET POIN eite ore ete e ep ete ied 74
5. Procedure Display Explanation Rotate the Voltage control Control operates similarly to Voltage Jand Voltage keys The control first counterclockwise and is rate sensitive Turning it more quickly causes a more rapid change in then clockwise voltage Press T Voltage 4 0 40 00 Program the output to 40 volts Press Display shows default OVP overvoltage protection trip voltage for your unit see Supplemental Characteristics in appendix A Press 0 OV 30 Program the OVP to 30 volts which is less than the output voltage Press Enter 0 000 OVP voltage entered is less than the output voltage This causes the OVP circuit to trip The output drops to zero CV turns off and Prot turns on tripped Return display to meter mode optional step Press Press 5 0 0 000 Program the OVP to 50 volts which is greater than the output voltage Note You cannot clear an OVP trip until you have first removed the cause of the condition Press Shows that the Agilent SAS shuts down because the OVP circuit has Press Prot Clear 40 00 The OVP circuit is cleared restoring the output Prot turns off and CV Shift yt turns on Shift is the unlabeled blue key Checking the Current Function The tests in Table 3 2 check the basic current functions with a short connected across the Agilent SAS output These tests are possible only from the front panel when the unit is operating in Fixed mode Do not prog
6. m You can operate your Agilent SAS from a nominal 100 V 120 V 220 230 V or 240 V single phase line as indicated on the rear panel line Rating label QD See AC Input Ratings in table 1 or table 2 in appendix for the voltage and frequency range for the Agilent SAS Refer to Maximum AC Line Current Ratings for the maximum load current The line fuse is located in a fuseholder on the rear panel The rear panel label shows the fuse value used in the unit See Operator Replaceable Parts in chapter 1 for replacement fuse information Figure 2 1 Agilent SAS Power Connection 20 Installation AC Line Voltage Conversion SHOCK HAZARD Hazardous voltage can remain inside the unit even after it has been turned off This procedure should only be done by qualified electronics service personnel Line voltage conversion is accomplished by changing wire and jumper positions on the ac input of the main power transformer Proceed as follows 1 Turn off the ac power to the unit and disconnect the power cord from the ac line 2 Remove the four screws that secure the two carrying straps and outer cover 3 Slightly spread the bottom rear of the cover and pull it back to disengage it from the front panel 4 Slide the dust cover back far enough to expose the line select jumpers see figure 2 2 5 Move the line voltage select jumpers to the positions corresponding to the desired line voltage To disconnect it from the t
7. e Re HE 105 Current Monitoring Resistof o eR Dor te peo eU Ur ern eei er een de detiene 105 jcuieu m r 106 General Measurement Techniques 106 Programming the Agilent SAS oet eee nione De ertet eter 106 Order of Tests oer etd e erre d uer o i abate sa d nb ete 106 Turn On Checkout noe ee OUO E EE 106 Voltage Programming and Readback Accuracy sess rennen 106 Current Programming and Readback Accuracy sese nee eren eene 107 Calibration eeu es cea nbd babe thaene eased eet 108 Test Equipment Required deo e este er ti de Tec ets 108 General Procedure eA AAAS RAS RET ea GaAs aed 108 Parameters Calibrated 5 oen ee bite iier pH 108 Front Panel Cal bration cde ee ee beer ire y t te ceo edid deed 109 Entering the Calibration Values enm ote tte eren pe Re REUS 109 saving the Calibration Constants 4 ser e be pep nene e 109 Disabling the Calibration Mode sss ene nee rennen tnter etre enne 109 Changing the Calibration Password sees nennen een rennen nennen 109 Recovering From Calibration Problems eese nennen eene rennen eene 111 Calibration Error Message Si
8. 410 END IF 420 IF Err_found THEN 430 PRINT VOLTAGE CALIBRATION NOT SAVED 440 ELSE 450 PRINT VOLTAGE CALIBRATION COMPLETE 460 END IF 470 480 Current_cal Imon DAC and Current DAC calibration 490 Err_found 0 500 PRINT TABXY 5 10 CONNECT INSTRUMENTS AS SHOWN IN FIG 1 2 Then Press Continue 510 PAUSE 520 CLEAR SCREEN 530 Figure 2 Agilent BASIC Calibration Program 114 Verification and Calibration 1540 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 Password is optional only required if set to non zero value Default password is four digit model number OUTPUT Ps CAL STATE ON 4350 OUTPUT Ps VOLT LEV 2 Refer to Table A 1 for correct shunt value for model being calibrated INPUT ENTER VALUE CURRENT SHUNT BEING USED Shunt_val OUTPUT Ps CAL CURRENT LEVEL MIN INPUT ENTER VOLTAGE MEASUREMENT FROM EXTERNAL VOLTMETER Volt read Current Volt_read Shunt_val OUTPUT Ps CAL CURRENT Current OUTPUT Ps CAL CURRENT LEVEL MAX INPUT ENTER VOLTAGE MEASUREMENT FROM EXTERNAL VOLTMETER Volt_read Current Volt_read Shunt_val OUTPUT Ps CAL CURRENT Current GOSUB Save_cal IF Err_found THEN INPUT ERRORS have occurred REPEAT CURRENT CALIBRATION Y OR N
9. Resp IF TRIMS UPCS Resp L1 Y THEN GOTO Volt cal END IF IF Err found THEN PRINT CURRENT CALIBRATION NOT SAVED ELSE PRINT CURRENT CALIBRATION COMPLETE END IF STOP SAVE CALIBRATION REPEAT OUTPUT Ps SYSTEM ERROR ENTER Ps Err_num Err_msg IF Err num gt 0 THEN PRINT ERROR Err msg Err_found 1 END IF UNTIL Err_num 0 IF NOT Err_found THEN INPUT SAVE CALIBRATION CONSTANTS Y OR N IF TRIMS UPCS Resp L1 Y THEN OUTPUT Ps CAL SAVE END IF END IF OUTPUT Ps CAL STATE OFF RETURN END Figure A 2 Agilent BASIC Calibration Program continued Verification and Calibration 115 Digital Port Functions Digital Connector 4 pin connector and a quick disconnect mating plug are provided for digital input and output signals see Figure for wiring connections and appendix A for electrical characteristics This digital port can be configured to provide either Fault Inhibit or Digital I O functions Note Consistent with good engineering practice twist and shield all signal wires to and from the digital connector DIG CNTL izaan JOGI TAL vo FAULT INHIBI 1 ouro Fir output 81 Common NH Common Figure C 1 Digital Port Connector A Insert wires AWG 12 22 Tighten screws 60 1654 Fault Inhibit Operation As shipped from the factory the digital port is configured to provide a fault indicator FLT
10. 67 90 91 SCPI subsystem command ABOR 84 CURR 75 CURR MODE 76 CURR PROT 76 126 Index CURR PROT STAT 76 CURR SAS ISC 77 CURR SAS IMP 77 CURR TABL NAME 77 CURR TABL OFFS 77 CURR TRIG 75 DIG DATA 77 DISP 71 DISP MODE 71 DISP TEXT 72 MEAS CURR 72 MEAS VOLT 72 MEM COPY TABL 73 MEM DEL ALL 73 MEM TABL CAT 74 MEM TABL CURR 73 MEM TABL CURR POIN 74 MEM TABL SEL 73 MEM TABL VOLT 73 MEM TABL VOLT POIN 74 INIT 84 INIT CONT 84 OUTP 74 OUTP PROT CLE 74 OUTP PROT DEL 75 STAT OPER 80 STAT OPER COND 80 STAT OPER ENAB 81 STAT OPER NTR 81 STAT OPER PTR 81 STAT PRES 81 STAT QUES 82 STAT QUES COND 82 STAT QUES ENAB 82 STAT QUES NTR 83 STAT QUES PTR 83 SYST ERR 83 SYST VERS 84 TRIG 85 TRIG SOUR 85 VOLT 78 VOLT TRIG 78 VOLT PROT 79 VOLT SAS VOC 79 VOLT SAS VMP 79 VOLT TABL OFFS 80 shunt regulation 104 simulator mode 16 restrictions 16 equations 103 stand alone connections 37 status operation 80 87 questionable 82 89 standard event 56 62 80 87 89 status bit CAL 76 88 CC 76 88 CME 63 88 CV 76 88 DDE 63 88 ESB 63 68 88 91 EXE 63 88 63 68 88 90 MSS 67 88 90 OC 71 74 77 88 92 OPC 63 88 93 OPER 68 88 92 OT 74 77 88 9 OV 77 83 88 PON 63 88 91 108 PSC 64 65 68 89 91 QUES 68 88 63 77 88 RI 77 88 93 RQS 88 92 UNR 77 88 WTG 70 77 80 88
11. OUTPUT 705 CURR MODE TABLE put in Table mode Output on WAIT 2 change voltage offset OUTPUT 705 VOLT TABL OFFS 2 25 WAIT 2 change current offset OUTPUT 705 CURR TABL OFFS 0 5 Figure 6 3 Programming Agilent SAS Functions 58 Remote Programming 570 delete table 580 Display_msg DELETING 1 590 Output off 600 OUTPUT 705 CURR MODE FIX exit Table mode 610 OUTPUT 705 CURR TABL NAME de activate active table T1 620 space required after NAME 630 OUTPUT 705 MEM TABL SEL de select working table 1 640 space required after SEL 650 OUTPUT 705 MEM DEL T1 delete table T1 660 END 670 680 SUB Display msg Msg 690 OUTPUT 705 DISP TEXT amp MsgS amp E OUTPUT 705 DISP MODE TEXT 710 WAIT 2 OUTPUT 705 DISP MODE NORM 730 SUBEND 2 750 SUB Output_on OUTPUT 705 OUTP 1 770 SUBEND Ee 790 SUB Output_off 800 OUTPUT 705 OUTP 0 810 SUBEND Figure 6 3 Programming Agilent SAS Functions continued Remote Programming 59 Language Dictionary Introduction This section gives the syntax and parameters for all the IEEE 488 2 SCPI commands and the Common commands used by the Agilent SAS It is assumed that you are familiar with the material in chapter 6 Remote Programming That chapter explains the terms symbols and syntactical s
12. Select the first calibration point by pressing If the Agilent SAS is not in CC mode an error occurs 3 Wait for DVM reading to stabilize Then read DVM and compute the first current value DVM reading shunt resistance 4 Use Entry keypad to enter the first current value 5 Select second calibration point by pressing again 6 Wait for DVM reading to stabilize Then read DVM and compute the second current value DVM reading shunt resistance 7 Use Entry keypad to enter the second current value Note If the entered value is not within acceptable range an error occurs Wait for the Agilent SAS to compute the new current calibration constants which will be stored in RAM Display Response VRDG2 Meter mode CAL ERROR Meter mode OVPCAL CAL COMPLETE NOT CV MODE DOES NOT CAL Meter mode IRDGI WRONG MODE Meter mode Meter mode IRDG2 Meter mode Meter mode CAL ERROR CAL COMPLETE NOTES If CAL DENIED appears then an internal jumper has been set to prevent the calibration from being changed See the Service Manual Tf the active password is lost the calibration function can be recovered by moving an internal jumper that defeats password protection However this also will change all calibration constants to their factory default values For more information see the Service Manual Program the output current to 10 of its rated output Program the output voltage to 10 of i
13. 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 s 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 Company 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 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 With the exceptions noted all instruments are intended for indoor use in an installation category II pollution degree 2 environment They are designed to operate at a maximum relative humidity of 9596 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 pro
14. The remaining shifted keys are for calibration see appendix B Calibration joe Front Panel Operation 43 Programming the Output Important These instructions show how to program a single Agilent SAS from the front panel These instructions apply primarily when the unit is set to operate in Fixed mode For example any voltage and current values that you enter from the front panel will have no effect on the unit while it is in Simulator or Table modes but will take effect as soon as the unit is placed in Fixed mode Likewise the OCP function only takes effect in Fixed mode There are also special considerations when you have two or more supplies connected in series or in parallel See chapter 4 User Connections and Considerations The Agilent SAS accepts values directly in volts and amperes Values will be rounded off to the nearest multiple of the output resolution see Average Resolution in appendix A If you attempt to enter a value not in a valid range the entry will be ignored and OUT OF RANGE appears on the display Figure 1 1 on page 1 3 shows the general response of a typical unit in Fixed mode Always keep the output voltage and current within the boundaries of its operating line for the specified mode of operation CV or CC Establishing Initial Conditions Set the Agilent SAS to its RST state by pressing 0 Enter This state was stored in location 0 at the factory If it has since b
15. degrees BR in Hertz Fixed Mode The following four output impedance graphs were generated while both Agilent SAS models where operating in Fixed mode during constant voltage and constant current operation Agilent E4350B Nw LIII LLL Constant C t Operation ERAT Voltage 41 V i penes i PSE Ii Bii Current 79 A Ph L EN AL T TI 0 in 4 degrees ill 40 790 K Frequency in Hertz einer ener HH pam WE Impedance Voltage 80 V n Omeeasa SCR IN RAE 2 N 180 degrees ER ECHTE Frequency in Hertz Specifications and Application Information 101 E Constant Volt f Operation S BA R TTT Voltage 50 V R d 1 10 Phase in degrees Impedance in ohms Constant Voltage Operation Voltage 100 V dli Current 095 CERCLE THM EO RT Impedance in ohms Bien in Hertz Peak Power Tracker Application The peak power tracker is a customer provided application In this application the load is constantly searching for the maximum power point of the I V curve To achiev
16. this cancels any uncompleted trigger actions Disables the calibration function by setting CAL STATe to OFF Sets display functions as follows WIND STATe to ON WIND MODE to NORMal WIND TEXT e Sets INIT CONT to OFF e Sets TRIG SOUR to BUS e Resets the Agilent SAS to FIXed mode CURR MODE FIX At power turn on the Agilent SAS normally is returned to the factory defined turn on state see RST However it also may turn on to the state stored in location 0 see chapter 5 under Turn On Condition Language Dictionary 65 Command Syntax RCL lt NRf gt Parameters 0111213 Example RCL3 Query Syntax None Related Commands PSC RST SAV RST Meaning and Type Reset Device State Description This command resets the Agilent SAS to a factory defined state as defined below RST also forces an ABORt command If Simulator or Table mode had previously been programmed the operation of the unit returns to Fixed mode Simulator mode settings revert to the factory default values and no tables are selected Command State CAL STAT OFF DISP WIND MODE NORM CURR LEV IMM DISP WIND TEXT CURR LEV TRIG INIT CONT OFF CURR MODE FIXed OUTP STAT OFF CURR PROT MAX OUTP PROT DEL CURR PROT LEV TRIG SOUR BUS CURR PROT STAT OFF VOLT LEV IMM CURR SAS ISC VOLT LEV TRIG CURR SAS IMP 0 8 X IMAX VOLT PROT LEV CURR TABL OFFS 0 VOLT SAS VOC VMAX DIG DATA 0 VOLT SAS VMP
17. 0 8 X VMAX DISP WIND STAT ON VOLT TABL OFFS 0 Model dependent value See Table 7 3 Command Syntax RST Parameters None Query Syntax None Related Commands PSC SAV SAV Meaning and Type SAVE Device State Description This command only applies in Fixed operating mode It saves the present state of the Agilent SAS to the specified location in non volatile memory Up to four states can be stored Under certain conditions see Turn On Conditions in chapter 5 location 0 may hold the device state that is automatically recalled at power turn on Simulator and Table mode states cannot be saved by this command The following Agilent SAS parameters are stored by SAV CURR LEV IMM OUTP STAT OUTP REL POL CURR PROT STAT OUTP PROT DEL VOLT LEV IMM DIG DATA VAL OUTP REL STAT VOLT PROT LEV 66 Language Dictionary The Agilent SAS uses nonvolatile memory for recording register states Programs that repeatedly use SAV for recalling states cause frequent write cycles to the memory and can eventually exceed the maximum number of write cycles and may cause the memory to fail see Supplemental Characteristics in appendix A Command Syntax SAV lt NRf gt Parameters 0111213 Example SAV 3 Query Syntax None Related Commands RST SRE Meaning and Type Service Request Enable Device Interface Description This command sets the condition of the Service Request Enable Register This register determines wh
18. 2 VOLTAGE LEVEL 60 PROTECTION 65 CURRENT LEVEL 4 PROTECTION ON Note the use of the optional header LEVEL to maintain the correct path within the voltage and current subsystems and the use of the root specifier to move between subsystems Value Coupling Value coupling results when a command directed to send one parameter also changes the value of a second parameter There is no direct coupling among any Agilent SAS SCPI commands However be aware that until they are programmed uninitialized trigger levels will assume their corresponding immediate levels For example if a unit is powered up and VOLT LEV is programmed to 60 then VOLT LEV TRIG will also be 60 until you program it to another value Once you program VOLT LEV TRIG to another value it will remain at that value regardless of how you subsequently reprogram VOLT LEVEL Including Common Commands You can combine common commands with system commands in the same message Treat the common command as a message unit by separating it with the message unit separator Common commands do not affect the active header path you may insert them anywhere in the message VOLT TRIG 55 INIT TRG OUTP OFF RCL 2 00 ON SCPI Queries Observe the following precautions with queries Remember to set up the proper number of variables for the returned data Set the program to read back all the results of a query before sending another command to the Agilent SAS Otherwise a Query Interrup
19. 40 50 60 65 20 40 60 80 100 120 130 EXE n 1 Impedance dc Resistance 0 62 Q moe Set ae Saas pee ee er EI Piet T e Phase in degrees L Ns PN T XI A Agilent E4350B Test Point 2 Phase in Voltage 60 V degrees Current 7 5 A dc Resistance 4 3 Impedance in ohms Frequency in Hertz Specifications and Application Information 99 Agilent E4350B Test Point 3 Voltage 40 75 V Current 7 9 A dc Resistance 200 Q Impedance in ohms Phase in 13 degrees Agilent 4351 Test Point 1 Voltage 128 8 V Current 0 5 A dc Resistance 2 48 Q Impedance in ohms 111 2 Phase in iil degrees 10 100 1K Frequency in Hertz Agilent EA3518 T t 1 t 2 LS SS mu ONE RED RS DRE Nu _ Phase in oltage 120 lt 10 degrees Current 3 75 A Hille dc Resistance 17 2 ms mp Impedance in ohms Frequency in Hertz 100 Specifications and Application Information Agilent E4351B Test Point 3 Voltage 81 5 V Current 3 95 A BIDS dc Resistance 800 Q an Phase in
20. 400 10 20 30 40 50 60 70 80 490 500 510 20 4 4 4 4 4 4 4 4 540 550 560 WAIT 2 F 5 ORE SAS_DEMO This example program demonstrates how to 1 use the Agilent SAS in Fixed Mode 2 use the Agilent SAS in Simulator Mode 3 use the Agilent SAS in Table Mode This program assumes the Agilent SAS is at GPIB address 5 Resetting the Agilent SAS CL OU EAR 705 705 RST CLS Turn on the output with 5V and 1A current limit Display msg FIXED MODE OUTPUT 705 VOLT 5 CURR 1 Output on Set up and trigger a voltage change OUTPUT 705 VOLT TRIG 6 set trigger output level OUTPUT 705 INIT initiate trigger system WAIT 2 OUTPUT 705 TRIG WAIT 2 Output off Output a Simulator curve Display msg SAS MODE OUTPUT 705 CURR SAS ISC 4 IMP 3 VOLT SAS VMP 40 VOC 55 OUTPUT 705 CURR MODE SAS put in Simulator mode Output on WAIT 2 change the current curve to an auto parallel Slave curve OUTPUT 705 CURR SAS ISC 0 IMP 0 WAIT 2 Output off Table mode Display msg TABLE MODE OUTPUT 705 MEM TABL SEL 1 create table T1 Download data points for table Tl OUTPUT 705 MEM TABL VOLT 0 5 10 40 45 50 OUTPUT 705 MEM TABL CURR 4 3 8 3 6 3 1 30 OUTPUT 705 CURR TABL NAME 1 activate table 1
21. 46 Protect 25 43 45 Prot Clear 25 43 46 Recall 27 42 44 47 Save 27 42 47 shift 24 41 42 Voltage 24 43 44 Voltage 24 43 44 T Voltage 24 43 44 front panel LCD 41 42 front panel RPG controls 42 Current 26 43 45 Voltage 24 25 43 44 fuse 20 124 Index G ground chassis 30 36 earth 13 30 signal 30 GET command 68 84 H handles rack 13 hardware 14 header see SCPI header Agilent BASIC 57 DOS driver 57 GPIB address 27 37 38 cables 13 capabilities 98 connections 37 38 program errors 121 16 54 103 impedance analog input 37 load see inductive load output 15 35 47 99 implied colon 50 51 decimal point 52 header see header optional message terminator 52 inductive load 31 32 INH input 30 93 117 118 initial conditions see turn on conditions interrupt 56 90 Isc 16 54 104 isolation see output isolation J jumper calibration 108 digital port configuration 119 line voltage selection 21 K keyword see header kit rack mounting 13 L LED see front panel LEDs line cord 19 20 line fuse see fuse linked connections 37 local voltage sensing 31 load capacitive see capacitive load inductive see inductive load load wire 29 maximum power 16 17 measurement subsystem 72 memory table subsystem 73 message error see error messages meter mode 24 monitor current
22. 67 68 89 90 TRG 51 55 62 64 68 84 85 TST 62 68 W AT 62 64 68 92 Common P 29 connections see GPIB connections connector analog port 118 digital port 118 119 CRD 53 Current control 31 42 47 current monitor 29 105 107 current monitoring resistor 105 CV bit see status bit CV mode 43 47 58 60 D data boolean 53 66 71 74 83 character 53 multiplier 53 numerical 53 suffix 53 device clear 50 64 68 93 DDE bit see status bit default state see RST state DFI 35 92 93 98 digital port 117 applications 120 connections 117 configuration jumper 119 pin configuration 120 electrical characteristics 97 E electrostatic discharge 20 equations 103 error messages Index 123 calibration 111 122 hardware 121 runtime 28 121 selftest 28 121 system 121 error queue 83 90 exhaust fan 19 20 23 external current control 37 ESB bit see status bit ESD pulse 20 EXE bit see status bit F factory default state see RST state Fixed mode 17 restrictions 18 FLT output 30 92 98 117 front panel 17 18 41 42 front panel annunciators see annunciators front panel data ENTRY keys 42 front panel keys 5 25 43 45 47 Address 27 42 43 Cal Save 109 110 43 26 43 45 Current 26 42 45 T Current 26 42 45 Enter 24 43 42 42 OCP 26 33 42 43 Output on off 23 43 47 25 27 42 43
23. COPY TABL This command copies the table that was selected with MEM TABL SEL to non volatile memory You can use the same name or a different name Names cannot be longer than 12 alphanumeric characters and must start with an alpha character A maximum of 30 tables can be stored in non volatile memory Non volatile memory has only 3 500 table points available to be shared among all tables Tables larger than 3 500 points cannot be copied Command Syntax MEMory COPY TABLe STR Parameters valid table name Examples MEM COPY TABL curvel MEM DEL ALL MEM DEL NAME These commands delete all or the specified user defined table in both volatile and non volatile memory Note that MEM DEL ALL does not delete any tables if a table has been activated with the SOURe CURRent TABLe command Command Syntax MEMory DELete ALL MEMory DELete NAME STR Parameters valid table name Examples MEM DEL ALL MEM DEL NAME curvel MEM TABL SEL This command creates a new table to be programmed with a list of voltage and current points Table names cannot be longer than 12 alphanumeric characters and must start with an alpha character This command is also used to select an existing table in volatile memory to be copied into non volatile memory using MEM COPY TABL If you send this command without specifying a table name it will de select any selected table Command Syntax MEMory TABLe SELect lt name gt Parameters valid table name Examples MEM TAB
24. MAX 73 0 V 140 0 V Programming range is 0 to MAX RST OVP value 73 0 V 140 0 V Calibration Commands See appendix B Display Subsystem This subsystem controls the state and output of the alphanumeric portion of the display DISP Enables or disables the display When disabled the display characters are blank The annunciators are not affected by this command Command Syntax Parameters RST Value Examples Query Syntax Returned Parameters Related Commands DISP MODE DISPlay WINDow STATe bool 0I 1I OFFI ON ON DISP ON DISPLAY STATE DISPlay WINDow STA Te NR1 0 or 1 DISP MODE DISP TEXT RST Switches the display between its normal metering mode and a mode in which it displays text sent by the user Command Syntax Parameters RST Value Examples Query Syntax Returned Parameters Related Commands DISPlay WINDow MODE lt CRD gt NORMal TEXT NORM DISP MODE NORM DISPLAY MODE NORMAL DISPlay WINDow MODE lt CRD gt NORMAL or TEXT DISP DISP TEXT RST Language Dictionary 71 DISP TEXT Sends character strings to the display when the display mode is TEXT The LCD display has the following character set LCD Character Set uppercase letters A through Z Case sensitive entry digits 0 through 9 punctuation _1 lt gt blank space A display is capable of showing up to 12 characters However the three punctuation characte
25. MS pia 4 f 0 D m mm m gt OAnalog Connectors Slave Units _ Master Unit Load e Set all units to either local sensing or remote sensing e Optional remote sense connections Note that because there is already an output impedance associated with the units in Simulator and Table modes in many cases remote sensing has little effect especially if the load lead resistance is kept low Figure 4 7 Auto Parallel Connection in Simulator Mode Remote Sensing Optional Auto Parallel Programming in Simulator and Table modes When operating in Simulator mode all units must be programmed with identical curves However the Isc and Imp values sent to the slave units must be set to zero 0 This is because in auto parallel mode the master unit controls the output current of the slave units When operating in Table mode all units must be programmed with identical table data However you must append a value of 999 at the end of the current data and a value of 999 at the end of the voltage data for slave units This again allows the master unit to control the output current of the slave units Refer to chapter 6 under Programming Units in Auto parallel for a programming example Auto Parallel Wiring in Fixed Mode Figure 4 8 illustrates how units can be connected in auto parallel for increased current output with current sha
26. Operation Status group The commands to do this are STAT OPER PTR 1280 ENAB 1280 It is not necessary to change any other registers since the programming for the operation summary bit OPER path has already been done Servicing Questionable Status Events To add OC overcurrent and OT overtemperature events to this example program Questionable Status group bits 1 and 4 STAT QUES PTR 18 ENAB 18 Next you must program the Service Request Enable register to recognize both the questionable QUES and the operational OPER summary bits SRE 136 Status Reporting 91 Now when there is a service request read back both the operational and the questionable event registers STAT OPER EVEN QUES EVEN Monitoring Both Phases of a Status Transition You can monitor a status signal for both its positive and negative transitions For example to generate RQS when the Agilent SAS either enters the CC constant current condition or leaves that condition program the Operational Status PTR NTR filter as follows STAT OPER PTR 1024 NTR 1024 STAT OPER ENAB 1024 SRE 128 The PTR filter will cause the OPER summary bit to set RQS when CC occurs When the controller subsequently reads the event register STAT OPER EVEN the register is cleared When CC subsequently goes false the NTR filter causes the OPER summary bit to again set RQS SCPI Command Completion SCPI commands sent to the Agilent SAS are processed either sequentially or in par
27. PRI IRAM Primary internal RAM thermistor reading E6 PRI ROM Primary ROM checksum E12 DACS Secondary VDAC IDAC E7 GPIB GPB R W to serial poll readback Checksum Errors If the display shows EE CHKSUM the Agilent SAS has detected an EEPROM checksum error A checksum error can occur due to the following conditions m Excessive number of write cycles to an EEPROM see Supplemental Characteristics This condition which would appear only after extended use is not recoverable and requires service W Loss of ac input power during a checksum calculation This condition which is very unlikely is recoverable You may be able to recover from a checksum error by writing to the EEPROM while the Agilent SAS is in the calibration mode To do this proceed as follows 1 Enable the calibration mode by pressing 1 Enter 2 PASWD will appear on the display 3 Press the number keys corresponding to the password followed by Enter The Cal annunciator will go on Note On new equipment the default calibration password corresponds to the model number such as 4350 See appendix B under Changing the Calibration Password for more information 4 Save any operating state for example press 0 Enter 5 Turn the power off and then back on A normal display free of error messages should appear If not the Agilent SAS requires service Runtime Error Messages Under unusual operating conditions the VOLT o
28. RR aec De een 47 Unregulated Operation seeni I PUESTOS 47 Saving and Recalling States ede re OSEE rere etit cte eme Eres 47 Lutn orn de ete e ia a dees aes ledere t dt cle one de ek ene 47 Setting the GPIB Address o teet e reU sr UR HEP ue de EET ENTERS 48 Types of GPIB Addresses eio epar etre e 48 Changing the GPIB Address esiti ete ripe ipee prie DE ee cip tpe 48 Remote Programming GPIB Capabilities of the Power Supply tiere ERG Re Tee RETE ERES Fe ERO 49 Introduction to S CPI ete efte ree AE e OH nh p i eee Hp reed erret 49 Conventions ito e D teo e EE Ere per be tere Uer e hughes 49 Lypes of SCPI Commands IRR eR 50 Multiple Commands in a EEEn Erse SE R 50 Moving Among SUbSyStelns eer d ieu eR testesite bed nerven 51 Value Coupling oe ene PEG aO ORE UOI 51 Including Common Commands treten trennen 51 SCPI Qu erles ii 51 Types of SCPI Messages 5 nocentem ree D DROP D BRI De pietre RHET 51 The Message tenen db p eR Hera tp eee eive e edet e t e d ERR 52 eret Dac ERI ote ed annie Uo e 52 Qu
29. RST For VOLT TRIG VOLT RST SOUR VOLT PROT This command sets the overvoltage protection OVP level of the Agilent SAS If the output voltage exceeds the OVP level then the Agilent SAS output is disabled and the Questionable Condition status register OV bit is set see chapter 8 for more information An overvoltage condition can be cleared with the OUTP PROT CLE command after the condition that caused the OVP trip is removed The OVP always trips with zero delay and is unaffected by the OUTP PROT DEL command Command Syntax Parameters Default Suffix RST Value Examples Query Syntax Returned Parameters Related Commands SOUR VOLT SAS VOC SOURce VOLTage PROTection LEVel lt NRf gt Table 7 3 V MAX VOLT PROT 21 5 VOLT PROT LEV MAX VOLTAGE PROTECTION LEVEL 145E 1 SOURce VOLTage PROTection LEV el SOURce VOLTage PROTection LEVel MIN SOURce VOLTage PROTection LEVel MAX lt NR3 gt VOLT PROT returns presently programmed OVP level VOLT PROT MAX and VOLT PROT MIN return the maximum and minimum programmable OVP levels OUTP PROT CLE RST RCL This command sets the open circuit voltage in Simulator mode If you are programming a slave unit that is paralleled to a master unit you must set the same Voc value to the master and the slave unit Command Syntax Parameters RST Value Examples Query Syntax Returned Parameters Related Commands SOUR VOLT SAS VMP SOUR
30. Remote Programming 55 Writing to the Display You can include messages to the front panel LCD in your programs The description of DISP TEXT in chapter 7 shows the number and types of permitted display characters In order to write to the display you must first change it to text mode as shown in the following example DIS MODE TEXT Switch display to text mode RECALLED 2 Write Recalled 2 to the display DIS MODE NORM Return display to its normal mode Programming Status You can use status programming to make your program react to events within the Agilent SAS Chapter 8 Status Reporting explains the functions and bit configurations of all status registers Refer to figure 8 1 in that chapter while examining the examples given here Usually you will want the Agilent SAS to generate interrupts assert SRQ upon particular events For this you must selectively enable the appropriate status register bits The following examples allow the unit to assert SRQ under selected conditions STAT OPER ENAB 1280 PTR 1280 SRE 128 Assert SRQ when the unit switches between CV and CC modes STAT OPER ENAB 1 PTR 1 NTR 1 SRE 128 Assert SRQ when the unit enters or leaves calibration mode STAT QUES 3 PTR 3 SRE 128 Assert SRQ when the unit goes into overvoltage or overcurrent STAT OPER ENAB 1280 PTR 1280 Assert SRQ under any event occurring in the operation or STAT QUES 3 PTR 3 SRE 136 questionable registers The following example illustrates how you
31. Returned Parameters Related Commands TRIGer SOURce lt CRD gt BUS BUS TRIG SOUR BUS TRIGGER SOURCE BUS TRIGger SOURce BUS RST TRG TRIG IMM Language Dictionary 85 Status Reporting Agilent SAS Status Structure Figure 8 1 shows the status register structure of the Agilent SAS The Standard Event Status Byte and Service Request Enable registers and the Output Queue perform standard GPIB functions as defined in the JEEE 488 2 Standard Digital Interface for Programmable Instrumentation The Operation Status and Questionable Status registers implement status functions specific to the Agilent SAS Table 8 2 and Figure 8 1 show the bit configuration of each status register Operation Status Group Register Functions The Operation Status registers record signals that occur during normal operation The group consists of the following registers Condition register that holds real time status of the circuits being monitored It is a read only register A PTR NTR positive transition negative transition Filter that functions as described under STAT OPER NTRIPTR COMMANDS in chapter 7 Language Dictionary This is a read write register An Event register that latches any condition that is passed through the PTR or NTR filters Reading the Event register clears it Enable register that functions as described under STAT OPER ENAB in chapter 7 Language Dictionary This is a read write register The outputs o
32. SAS it is capable of generating a FLT signal at the digital port see appendix C Digital Port Functions The source for the DFI signal can be any Questionable Operation or Standard Event status event see Figure 8 1 92 Status Reporting RI Remote Inhibit Whenever a remote inhibit signal is received at the digital port see appendix C Digital Port Functions the Agilent SAS will receive an RI event at the Questionable Status register By programming the status subsystem you may use RI to generate a service request SRQ to the controller and or to create a DFI output at the digital port By using RI DFI in this way you can chain the power supplies to create a serial shutdown in response to the INH input To enable the OV OC OT and the RI conditions to generate an FLT signal program the Questionable Status register as follows STAT QUES ENAB 531 Using Device Clear You can send a device clear at any time to abort a SCPI command that may be hanging up the GPIB interface The status registers the error queue and all configuration states are left unchanged when a device clear message is received Device clear performs the following actions The input and output buffers of the dc source are cleared The dc source is prepared to accept a new command string The following statement shows how to send a device clear over the GPIB interface using Agilent BASIC CLEAR 705 IEEE 488 Device Clear The following statement shows
33. Syntax CALibrate VOLTage DATA lt NRf gt Parameters See applicable Output Ratings in appendix Default Suffix Examples CAL VOLT 322 5 CAL VOLT DATA 3 225 Related Commands CAL SAVE CAL STAT CAL VOLT LEV This command sets the Agilent SAS to a calibration point that is then entered with CAL VOLT DATA During calibration two points must be entered and the low end point MIN must be selected and entered first Command Syntax CALibrate VOLTage DATA MINIMAX Parameters lt CRD gt MINimum Examples CAL VOLT LEV MIN CAL VOLT LEV MAX Related Commands CAL VOLT DATA CAL STAT CAL VOLT PROT This command calibrates the Agilent SAS overvoltage protection OV circuit The output voltage must be in calibration before this procedure is performed Also the Agilent SAS output must be enabled and operating in the constant voltage CV mode If present the optional relay accessory must either be disconnected or set to the off open state The Agilent SAS automatically performs the calibration and stores the new OV constant in nonvolatile memory CAL VOLT PROT is a sequential command that takes several seconds to complete Command Syntax CALibrate VOLTage PROTection Parameters None Example CAL VOLT PROT Related Commands CAL STAT Verification and Calibration 113 Agilent BASIC Calibration Program The following program can be run on any controller operating under Agilent BASIC The assumed Ag
34. Technologies Canada Ltd 5150 Spectrum Way Mississauga Ontario LAW 561 905 206 4725 Europe Agilent Technologies European Marketing Center P O Box 999 1180 AZ Amstelveen The Netherlands Japan Yokogawa Agilent Technologies Ltd Measurement Assistance Center 9 1 Takakura Cho Hachioji Shi Tokyo 192 Japan 81 426 48 3860 Latin America Agilent Technologies Latin American Region Headquarters 5200 Blue Lagoon Drive 9th Floor Miami Florida 33126 U S A 305 267 4245 4220 Manual Updates The following updates have been made to this manual since the print revision indicated on the title page 3 01 00 All references to HP have been changed to Agilent All references to HP IB have been changed to GPIB Information about installing VXIplug amp play instrument drivers has been added to page 21 9 20 04 The declarations page has been updated 5 11 09 A URL has been added to the declarations pages to obtain the latest declaration of conformity The RF field annotation note has been removed from Table A 1 Corrections have been made to Figure C 5
35. VOLT CURR INIT TRIG INIT TRG MEAS VOLT CURR Disable the output Program the voltage to 55V and the triggered level to 60 V Program the current to 2 5 A and the triggered level to 3 A Check all the programmed values Enable the output Read back the immediate levels from the sense terminals Arm the trigger circuit and send a single trigger Same as above except using a common command Read back the triggered levels from the sense terminals If you need to send two or more triggers program the trigger circuit for continuous arming OUTP OFF Disable the output VOLT LEV IMM 60 TRIG 55 Program the voltage to 60 V and the triggered level to 55 V INIT CONT ON Program the trigger circuit for continuous arming OUTP ON Enable the output to 60 V TRIG Trigger the output voltage to 55 V VOLT TRIG 60 TRIG INIT CONT OFF Saving and Recalling States Set the pending trigger level to 60 V and send a single trigger Remove the continuous trigger arming You can remotely save and recall operating states See SAV and RCL in chapter 7 for more information Note When you turn the Agilent SAS on it automatically retrieves the state stored in location 0 When a unit is shipped this location contains the factory defaults see RST in chapter 7 OUTP OFF VOLT LEV 6 5 PROT 6 8 CURR LEV 335 PROT STAT ON SAV 2 RCL 2 Program a desired operating state Save this state to location 2 Later recall this same state
36. a screwdriver Do not stack more than 3 connectors on a GPIB receptacle GPIB cable see Accessories in Chapter 1 From 1 to 15 linked supplies may be connected to 1 direct unit Either receptacle Jl or J2 may be used as an input or an output Serial Link Cable see Accessories in Chapter 1 2 meters 1 is supplied Maximum total length of all GPIB cables including controller not to exceed 20 meters Use caution with individual lengths over 4 meters Maximum total length of all serial cables not to exceed 30 meters NOTES A direct Agilent SAS is connected to the controller interface and must have a unique primary GPIB bus address The stand alone configuration uses only direct supplies connected to the controller interface The linked configuration uses 1 or more linked units connected to each direct unit Each linked unit has a unique secondary GPIB bus address and derives its primary address from the direct unit Figure 4 12 Controller Connections User Connections 39 Front Panel Operation Introduction Note Only in Fixed mode are front panel operations fully functional The Agilent SAS can be operated as a standard source in Fixed mode SAS functions are available when the unit is set to Simulator or Table mode You cannot switch modes from the front panel Modes can only be switched over the GPIB This chapter shows you how to operate the unit from front panel It is assumed that you are familiar with the turn on
37. air Resistance at 20 deg C Q m O ft 20 8 33 0 0345 0 01054 18 15 4 0 0217 0 00663 16 19 4 0 0137 0 00417 14 31 2 0 0086 0 00262 12 40 0 0054 0 00165 Analog Connector This connector which is on the rear panel is for connecting remote sense leads external current monitors and external current programming sources The connector accepts wires sizes from AWG 22 to AWG 12 Insert Wires 2 Tighten screws vo P Differential current programming input positive Differential current programming input negative 2 SAS_ Auto parallel output connection SAS mode only 1 PV output for IM and SAS signals HMM Current monitor output referenced to PV 8 remote sense input positive 5 remote sense input negative IP IP SAS IMS S oe o ee Figure 4 1 Rear Panel Analog Connector Note It is good engineering practice to twist or shield all signal wires to and from the analog and digital connectors To minimize spurious operation make sure that all analog wiring except for the and sense wires does not exceed 3 meters in length User Connections 29 Digital Connector This connector which is on the rear panel is for connecting fault inhibit digital I O or relay link signals The connector accepts wires sizes from AWG 22 to AWG 12 Pin No Fault Inhibit Digital 1 FLT OUTPUT OUT 0 2 FLT OUTPUT OUT 1 3 INH
38. and current values that you enter from the front panel will have no effect on the unit while it is in Table mode The front panel values will take effect as soon as the unit is placed in Fixed mode Likewise the OCP function only takes effect in Fixed mode All other functions such as Local Error Output On Off Protect are active while the unit is operating in Simulator mode 18 General Information Installation Inspection Damage When you receive your Agilent SAS inspect it for any obvious damage that may have occurred during shipment If there is damage notify the shipping carrier and the nearest Agilent Sales and Support Office immediately Warranty information is printed in the front of this guide Packaging Material Until you have checked out the Agilent SAS save the shipping carton and packing materials in case the Agilent SAS has to be returned to Agilent Technologies If you return the Agilent SAS for service attach a tag identifying the model number and the owner Also include a brief description of the problem Items Supplied In addition to this manual check that the following items in Table 2 1 are included with your Agilent SAS Table 2 1 Items Supplied Power cord Your Agilent SAS was shipped with a power cord for the type of outlet specified for your location If the appropriate cord was not included contact your nearest Agilent Sales and Support Office see end of this guide to obtain the correct cord Caution
39. b ADDR 5 the GPIB address factory default is 5 4 The display then goes into the meter mode with the Dis annunciator on and all others off Meter mode means that the VOLTS digits indicate the output voltage and the AMPS digits indicate the output current These values will be at or near zero 5 Verify that the Agilent SAS fan is on by placing your hand near the rear grill to feel the air flow You may also be able to hear the fan operating 6 Press Output on off once The Dis annunciator will go off and the CV annunciator will go Note If the Agilent SAS detects an error during self test the display will show an error message Go to In Case of Trouble at the end of this chapter Turn On Checkout 23 Using The Keypad Shifted Keys Some of the front panel keys perform two functions one labeled in black and the other in blue You access the blue function by first pressing the blue key which is not labeled When the Shift annunciator is on you will know you have access to the key s shifted blue function Backspace Key The key is erase key If you make mistake entering a number and have not yet entered it not pressed Enter you can delete the number by pressing You may delete as many numbers as you wish by repeatedly pressing this key Output Checkout Important When the Agilent SAS is turned on it asserts the state stored in EEPROM memory location 0 For a new unit this
40. bit ASCII This data type has String Response Data Returns string parameters enclosed in double quotes Remote Programming 53 Examples Most examples given here are generic without regard to the programming language or type of GPIB interface Because SCPI commands are sent as ASCII output strings within the programming language statements the SCPI syntax is independent of both programming language and interface The examples are followed by sample program code written for an Agilent BASIC controlled GPIB interface Programming Voltage and Current Note The Agilent SAS responds simultaneously to both digital and analog programming inputs If it is receiving an input over the GPIB and a corresponding input from the front panel and from the analog programming port the output will be the algebraic sum of the inputs Analog programming applies in Fixed mode only The following statements program both voltage and current and return the actual output from the sense terminals OUTP OFF Disable the output VOLT 55 CURR 2 5 Program the voltage and current VOLT CURR Read back the programmed levels OUTP ON Enable the output MEAS VOLT MEAS CURR Read back the outputs from the sense terminals Programming Protection Circuits This example programs the voltage and current programs an overvoltage protection value and turns on the overcurrent protection It then reads back all the programmed values Note the required use of the opt
41. controlled by bits 0 and 1 Pin 3 is controlled by bit 3 and can be programmed to serve either as an input or an output Pin 4 is the digital ground Language Dictionary 77 Bit position 2 normally serves as an output To change it to an input it must first be programmed high The DIG DATA query returns the last programmed value in bits 0 and 1 and the value read at pin 3 in bit 2 The bits are turned on and off in straight binary code as follows Digital I O Port Programming Chart Pins 1 and 2 are always outputs Command Syntax Parameters RST Value Examples Query Syntax Returned Parameters Related Commands SOUR VOLT SOUR VOLT TRIG Bit Bit Configuration Pin Configuration Configuration Pin Configuration Value 0 1 25 lu 32 3 4 Value 0 1 2 1 2 3 4 0 0 0 0 Lo Lo Output Gnd 4 0 0 1 Lo Lo Input Gnd 1 1 0 0 Hi Lo Output Gnd 5 1 0 1 Hi Lo Input Gnd 2 0 1 0 Lo Hi Output Gnd 6 0 1 1 Lo Hi Input Gnd 3 1 1 0 Hi Hi Output Gnd 7 l1 1 1 Hi Hi Input Gn SOURce DIGital DATA VALuel lt NRf gt 0 t0 7 0 DIG DATA7 DIGITAL DATA VALUE 7 SOURce DIGital DATA NRI Values from 0 to 7 RST RCL SAV These commands set the immediate voltage level or the pending triggered voltage level of the Agilent SAS The immediate level is the voltage programmed for the output terminals The pending triggered level is a stored voltage value that is transferred to the output terminals when a trigger occurs A pe
42. discharging the load capacitor under overvoltage conditions Excessive currents can damage the unit The peak discharge current is limited by the sum of the external capacitor s ESR equivalent series resistance and the series resistance of the external circuit For the Agilent E4351B s external capacitance limit of 2 000 the total resistance must not be less than 56 milliohms For smaller values of external capacitance the total resistance may be derated linearly Inductive Loads When operating in Simulator mode load inductance should be kept under 200UH For twisted pair wires or zipcord figure approximately 0 25uH per foot of load lead wire Connecting to an External Voltage Source The Agilent SAS s overvoltage circuit contains a crowbar SCR that effectively shorts the output of the unit whenever OVP trips Note If the OVP trips you must remove any external source of current in order to reset the internal SCR as part of clearing the OVP circuit see Clearing the OV Condition in chapter 8 If an external voltage source such as a battery is connected across the output and the OVP is inadvertently triggered the Agilent SAS will continuously sink a large current from the source This could damage the Agilent SAS To avoid this insert a reverse blocking diode in series with either output of the Agilent SAS in the direction of normal output current flow The diode s voltage rating should be at least 150 of the HP SAS s outpu
43. how to send a device clear over the GPIB interface using the GPIB command library for C or QuickBASIC IOCLEAR 705 Status Reporting 93 Specifications and Application Information Specifications and Supplemental Characteristics Performance specifications are warranted over a temperature range of 0 to 40 C unless specified otherwise Unless otherwise noted specifications apply to Fixed Simulator and Table modes Supplemental Characteristics are not warranted but are descriptions of performance determined either by design or type testing Table A 1 Performance Specifications for Agilent E4350B E4351B SAS Agilent E4350B Agilent E4351B Parameter Simulator Table Mode Output Ratings Fixed Mode Output Ratings Output Voltage Ripple amp Noise from 20 Hz to 20 MHz with a resistive load outputs ungrounded or either output grounded Output Current Ripple amp Noise from 20 Hz to 20 MHz with a resistive load outputs ungrounded or either output grounded Programming Accuracy 22 C 5 C Readback Accuracy from front panel or over GPIB with respect to actual output 22 5 C Fixed Mode Load Regulation change in output voltage or current for any load change within ratings Fixed Mode Line Regulation change in output voltage or current for any line voltage change within ratings Maximum Power Maximum Open Circuit Voltage Maximum Short Circuit Current Minimum Impedance Vol
44. installing the VXI plug amp play instrument driver make sure that you have one of the supported applications installed and running on your computer Access Agilent Technologies Web site at http www agilent com find drivers Select the instrument for which you need the driver Click on the driver either Windows 95 or Windows NT and download the executable file to your pc Locate the file that you downloaded from the Web From the Start menu select Run lt path gt agxxxx exe where path is the directory path where the file is located and agxxxx is the instrument driver that you downloaded 5 Follow the directions on the screen to install the software The default installation selections will work in most cases The readme txt file contains product updates or corrections that are not documented in the on line help If you decide to install this file use any text editor to open and read it 6 Tousethe VXI plug amp play instrument driver follow the directions in the VXI plug amp play online help under Introduction to Programming Tear Accessing Online Help A comprehensive online programming reference is provided with the driver It describes how to get started using the instrument driver with Agilent VEE LabVIEW and LabWindows It includes complete descriptions of all function calls as well as example programs in C C and Visual BASIC e To access the online help when you have chosen the default Vxipnp start folder clic
45. is the factory default RST state The following procedures assume that the factory default state is still in location 0 see Turn On Conditions in chapter 5 for details Checking the Voltage Function The tests in Table 3 1 check the basic voltage functions with no load connected to the Agilent SAS These test are possible only from the front panel when the unit is operating in Fixed mode The VOLTS display will show various readings Ignore the AMPS display Table 3 1 Checking the Voltage Functions with Output Terminals Open Procedure Display Explanation Either leave the output terminals open or connect them to a voltmeter If the Dis annunciator is on turn it off by pressing Output on off Press key VOLT 0 000 Default voltage setting CV annunciator should be on If CC annunicator is on increase the current by pressing Curent one or more times until CC turns off and CV turns on Press 4 0 VOLT 40 Program output to 40 volts Press 40 00 Enter the voltage Meter mode displays output voltage During these tests there may be a small relative to full output AMPS reading that will be ignored Press Voltage several Voltage decreases several millivolts each time you press the key times Press T Voltage the same Voltage increases several millivolts each time you press the key number of times 24 Turn On Checkout Table 3 1 Checking the Voltage Functions with Output Terminals Open continued
46. letters such as VOLT STAT DEL Query Indicator Following a header with a question mark turns it into a query VOLT VOLT PROT If a query contains a parameter place the query indicator at the end of the last header VOLT PROT MAX Message Unit Separator When two or more message units are combined into a compound message separate the units with a semicolon STATus OPERation QUEStionable Root Specifier When it precedes the first header of a message unit the colon becomes a root specifier This indicates that the command path is at the root or top node of the command tree Message Terminator A terminator informs SCPI that it has reached the end of a message Three permitted messages terminators are Newline NL which is ASCII decimal 10 or hex Endoridentify END W Both of the above lt NL gt lt END gt In the examples of this manual there is an assumed message terminator at the end of each message If the terminator needs to be shown it is indicated as NL regardless of the actual terminator character 52 Remote Programming SCPI Data Formats All data programmed to or returned from the unit is ASCII The data may be numerical or character string Numerical Data Table 2 1 Numerical Data Formats Symbol Data Form Talking Formats NRI Digits with an implied decimal point assumed at the right of the least significant digit Examples 273 0273 lt NR2 gt Digits with an e
47. lt NRf gt MODE mode PROTection LEVel lt NRf gt STATe bool SASimulator ISC lt gt lt NRf gt TABLe NAME lt name gt OFFSet lt NRf gt DIGital VALue lt NRf gt VOLTage LEVel IMMediate AMPLitude lt NRf gt TRIGgered AMPLitude lt NRf gt PROTection LEVel n SASimulator lt NRf gt VMP lt NRf gt TABLe OFFSet lt NRf gt STATus OPERation EVENt CONDition ENABle lt gt NTRansition lt NRf gt PTRansition lt NRf gt PRESet QUEStionable EVENt CONDition ENABle lt NRf NTRansition lt NRf gt PTRansition lt NRf gt VERSion TRIGger IMMediate SOURce lt source gt Sets the output current level Sets the triggered output current level Sets the operating mode FIX SAS TABL Sets over current protection level in Simulator and Table modes Enable Disable Fixed mode current limit protection 0 1 OFF ON Sets the short circuit current in simulator mode Sets the maximum power current in simulator mode Selects a table for use when the operating mode is Table Sets the offset current when the operating mode is Table Sets and reads the digital control port Sets the voltage level Sets the triggered voltage level Sets the overvoltage protection threshold Sets t
48. lt NRf gt lt bool gt SRE None ESE None PSC None STB None ESR None RCL lt NRf gt TRG None IDN None RST None TST None OPC None SAV lt NRf gt WAI None CLS Meaning and Type Clear Status Device Status Description This command causes the following actions see Chapter 4 Status Reporting for descriptions of all registers Clears the Standard Event Status Operation Status Event Questionable Status Event and Status Byte registers Clears the Error Queue If CLS immediately follows a program message terminator NL then the output queue and the bit are also cleared Command Syntax CLS Parameters None Query Syntax None ESE Meaning and Type Event Status Enable Device Status Description This command programs the Standard Event Status Enable register bits The programming determines which events of the Standard Event Status Event register see ESR are allowed to set the ESB Event Summary Bit of the Status Byte register A 1 in the bit position enables the corresponding event All of the enabled events of the Standard Event Status Event register are logically ORed to cause the Event Summary Bit ESB of the Status Byte register to be set See chapter 4 Status Reporting for descriptions of all three registers Bit Configuration of Standard Event Status Enable Register Bit Position 7 6 5 4 3 2 1 0 Bit Name PON 0 CM
49. mode only Press to display the OV trip voltage setting After pressing Ov you may use the ENTRY keys to change When the Prot annunciator is on press to see which protection circuit caused the Agilent SAS ENTRY Keys Voltage Press to increment the output voltage in the CV mode or to increase the voltage setting after you have pressed the key Press and hold this key for an increasingly rapid change Fixed mode only Press to decrement the output voltage in the CV mode or to decrease the voltage setting after you have pressed the key Press and hold this key for an increasingly rapid change Fixed mode only Press to increment the output current in the CC mode or to increase the current setting after you have pressed the key Press and hold this key for an increasingly rapid change Fixed mode only Press to decrement the output current in the CC mode or to decrease the current setting after you have pressed the key Press and hold this key for an increasingly rapid change Fixed mode only Current Press to select numerical values Press to enter a minus sign Press to delete the last keypad entry Use this key to remove incorrect digits before they are entered lear Ent Press to delete an entire keypad entry and return to the meter mode Use this key to exit from a value before it is entered Select by pressing C Press to enter a value or to accept an existing value and return the display to the meter mode
50. output and a remote INH input Unplug the mating plug to make the connections After you have finished making all connections plug the wired plug back into the connector FLT Output Used to indicate that a fault has occurred in power supply Pins and 2 are the open collector pins and 2 output of an optocoupler with pin the collector and pin 2 the emitter When a fault has occurred pin is driven low with respect to pin 2 negative true INH Input pin 3 Used to shut down the power supply output Pin 3 is a high impedance input The supply shuts down when this input is driven low negative true This can be done by shorting pin 3 to pin 4 INH Common pin 4 Provides the common connection for the INH input Three examples are provided to show how to use the FLT INH circuits of your power supply Use twisted wire connections to reduce or prevent EM in all cases If shielded wire is used connect only one end of the shield to the chassis signal ground binding post to prevent ground loops In Figure C 2 the INH input is connected to a switch that shorts pin 3 to pin 4 whenever it is necessary to externally disable the output of the supply This will activate the remote inhibit RI fault protection circuit causing the front panel Prot annunciator to come on It also sets the RI event bit in the supply s Questionable Status Event register see chapter 8 Status Reporting To re enable the supply after it has been disabled by the INH i
51. specifications 95 supplemental characteristics 96 status 87 subsystem commands 69 switch sense 30 31 support rails 13 20 I table mode 15 restrictions 15 memory 17 97 offsets 18 temperature characteristics 95 96 temperature environment 20 30 tree diagram 50 62 trigger continuous 84 immediate 69 84 initiating 84 source 85 turn on conditions 47 49 90 U units see data suffix UNR bit see status bit unregulated operation 20 32 42 47 V value coupling 51 verification test 106 Vmp 16 54 103 Voc 16 54 103 voltage sensing see local or remote voltage sensing W wait state 68 warning see safety warning wire size 29 WTG bit see status bit Index 127 Agilent Sales and Support Offices For more information call your local Agilent sales office listed in your telephone directory or an Agilent regional office listed below for location of your nearest sales support office United States of America Agilent Technologies Company Test and Measurement Organization 5301 Stevens Creek Blvd Bldg 51L 5C Santa Clara CA 95052 8059 800 452 4844 Asia Pacific Agilent Technologies Asia Pacific Ltd 17 21 F Shell Tower Time Square 1 Matheson Street Causeway Bay Hong Kong 852 2599 7070 Australia New Zealand Agilent Technologies Australia Ltd 31 41 Joseph Street Blackburn Victoria 3130 Australia 131 347 ext 2902 Canada Agilent
52. stand alone primary address and a direct primary address or a direct primary address and a secondary address 48 Front Panel Operation Remote Programming GPIB Capabilities of the Agilent SAS All Agilent SAS functions except for setting the GPIB address are programmable over the IEEE 488 bus also known as the General Purpose Interface Bus or GPIB The IEEE 488 1 capabilities of the Agilent SAS are listed in the Supplemental Characteristics in appendix A The Agilent SAS operates from a GPIB address that is set from the front panel see System Considerations at the end of this chapter Introduction To SCPI Important Learn the basics of Agilent SAS operation see chapter 5 Front Panel Operation before using SCPI SCPI Standard Commands for Programmable Instruments is a programming language for controlling instrument functions over the GPIB IEEE 488 instrument bus SCPI is intended to function with standard GPIB hardware and conforms to the IEEE Standard Digital Interface for Programmable Instrumentation SCPI is layered on top of the hardware portion of IEEE 488 2 The same SCPI commands and parameters control the same functions in different classes of instruments For example you would use the same DISPlay command to control the Agilent SAS display state and the display state of a SCPI compatible multimeter Note TMSL Test and Measurement System Language was an earlier versions of SCPI If you have programmed in this l
53. status bit R reading registers 33 56 89 90 real time status 80 82 87 90 recalled parameters 65 66 recalling states 14 27 41 48 55 65 66 register commands status byte 68 89 status operation 76 87 status preset 81 status questionable 82 89 standard event 63 64 89 regulation series 104 shunt 104 remote inhibit see RI remote voltage sensing 16 31 and output noise 32 and output rating 32 and output stability 32 switch 30 31 reset state see RST state Index 125 response message 51 resistor current monitoring 105 RI description 93 98 117 connector 30 117 118 root specifier 52 RQS bit see status bit RST state 66 90 RST POWER ON 48 S safety class 13 safety compliance 98 safety cover ac input 14 safety warning 13 20 21 29 30 36 65 105 saved parameters 66 saving states 27 47 55 66 SCPI active header path 51 command tree 50 69 70 common commands 50 62 completed commands 92 conventions 40 coupled commands 51 definition 49 message structure 52 message terminator 52 message unit 52 message unit separator 52 query indicator 52 related commands 61 root specifier 52 version 84 SCPI header conventions 52 long form 52 optional 49 51 path 51 separator 52 short form 52 serial poll 67 89 series connections 36 operation 36 regulation 104 service request see SRQ SETUP BAS 60 lt SRD gt 53 83 SRQ 42 56 65
54. then no transition of that bit at the Operation Condition register can set the corresponding bit in the Operation Event register Note Setting a bit in the value of the PTR or NTR filter can of itself generate positive or negative events in the corresponding Operation Event register Command Syntax STATus OPERtion NTRansition lt NRf gt STATus OPERtion PTRansition lt NRf gt Parameters 0 to 32767 Suffix None Default Value 0 Examples STAT OPER NTR 32 STAT OPER PTR 1312 Query Syntax STAT OPER NTR STAT OPER PTR Returned Parameters lt NRI gt Register value Related Commands STAT OPER ENAB STAT PRES This command sets all defined bits in the Status Subsystem PTR registers and clears all bits in the subsystem NTR and Enable registers STAT OPER PTR is set to 1313 and STAT QUES PTR is set to 1555 Command Syntax Parameters Examples Query Syntax Related Commands STA Tus PRESet None STAT PRES STATUS PRESET None None Language Dictionary 81 Status Questionable Registers Bit Configuration of Questionable Registers Bit Position 15 11 10 9 8 7 6 5 4 3 pt c 0 Condition UNR RI NU NU NU NU OT NU NU OC OV Bit Weight 1024 512 256 128 64 32 16 8 4 2 1 NU Not used Overcurrent protection circuit OCP or hardware overcurrent level OC has tripped OT Overtemperature status condition exists OV Overvoltage protection circuit has tripped RI Remote inhibit is active UNR Agilent SAS output is unre
55. 161 Invalid block data e g END received before length satisfied 168 Block data not allowed block data not accepted where positioned 220 Parameter error 221 Settings conflict uncoupled parameters 222 Data out of range e g outside the range of this device 223 Too much data out of memory block string or expression too long 240 Hardware error device dependent 241 Hardware missing device dependent 310 System error device dependent 313 Calibration memory lost out of calibration due to memory failure 330 Self test failed more specific data after 350 Queue overflow errors lost due to too many errors in queue 400 Query error generic query error 410 Query INTERRUPTED query followed by DAB or GET before response complete 420 Query UNTERMINATED addressed to talk incomplete programming message received 430 Query DEADLOCKED too many queries in command string 440 Query UNTERMINATED query received after query for indefinite response 0 No error 1 CAL jumper prevents calibration 2 CAL passcode is incorrect 3 CAL not enabled 4 Computed readback CAL constants are incorrect 5 Computed programming CAL constants are incorrect 6 Wrong sequence of calibration commands 7 or CC status is incorrect for this command 100 Table data not monotonic 101 Tables not same length of voltage points different from of current points 102 Table full 103 No tab
56. 30 Inductive Loads iiec tede oie epe t e i t Ree e rtp e ec rtent 31 Connecting to an External Voltage Source sess nennen een eene 31 Sense ConnectioDs cea a ade RISE emt He Oe eene pde 31 Remote Voltage Sensing cette eec te ete bebe p IRR HEU rire IE RUE Rebus 31 CV Regulation oori a ERU E RU meri U eee ite iba ied 32 Overvoltage Protection Considerations essent nennen nene 32 Output Ratings rion pe ca ee eines Aish ie flees nie Aas Glas Blea 32 doeet pd DD e ROTE 32 Sell de 32 Over Current Protection Considerations esee eene 33 Hardware Overcurrent Circuit nennen tren 33 Operating ConfiguratloDs uenerit repe p Ut a HERR EUR CREE terne ep REDE 33 Connecting the Load to One Unit eese eR e dee antes existe mde 33 Connecting Supplies in Parallel sessi nennen enn 34 Connecting Supplies in tenete nene 35 Auto Parallel Programming treten enne tenete TRESE SES tenerent 36 Connecting SUpphes qn S6r68 tie RU eere tret ined n es 37 Analog Current Control 9 3 ede Ue e E erbe erbe es 38 Controller Connections eet eO R
57. 30 000 points Tables are programmed using the MEMory commands as previously discussed Command Syntax Parameter RST Value Examples Query Syntax Returned Parameters SOUR CURR PROT SOURce CURRent MODE mode FIXed SASimulator TABLe FIXed CURR MODE TABL CURR MODE lt CRD gt This command sets an overcurrent protection level This is a hardware protection function similar to overvoltage protection Although always active its primary use is in Simulator and Table modes which do not have the constant current OCP protection that is available in Fixed mode When activated both front panel OV and OC annunciators are lit Note that the OUT PROT DEL command does not apply to this hardware overcurrent protection function Command Syntax Parameters RST Value Examples Query Syntax Returned Parameters Related Commands SOUR CURR PROT STAT SOURce CURRent PROTection LEVel lt level gt 0 to MAX Imax 1 1 CURR PROT 5 SOURce CURRent PROTection LEVel lt NRI gt OUTP PROT CLE RST This command is active in Fixed mode only It enables or disables the Agilent SAS overcurrent protection OCP function If the overcurrent protection function is enabled and the Agilent SAS goes into constant current operating mode then the output is disabled and the Questionable Condition status register OC bit is set see chapter 8 for more information An overcurrent condition can be cleared with the OUTP PROT CLE com
58. 8 Digital Port Functions FRONT 1 2 INPUT RAILLEDS 4 CONFIGURATION JUMPERS Pin configuration on earlier models FLT NH Position As Shipped Troubleshooting Digital UO Position Figure C 4 Digital Port Configuration Jumper Changing The Port Configuration As shipped from the factory the digital port is configured for FLT INH operation You can change the configuration of the port to operate as a general purpose digital input output port to control your custom circuitry as shown in Figure C 4 To change the port configuration you must move a jumper on the GPIB board Shock Hazard Hazardous voltage can remain inside the power supply even after it has been turned off This procedure should only be done by qualified electronics service personnel Proceed as follows Turn off the power supply and disconnect the power cord from the power source Remove the four screws that secure the two carrying straps and outer cover Spread the bottom rear of the cover and pull it back to disengage it from the front panel Slide the outer cover back to expose the top of the GPIB board Refer to Figure C 4 and use needle nose pliers to move the jumper to the Digital I O position Replace the outer cover and secure the carrying straps Make the necessary wire connections to the digital connector WN _ Digital I O Operation The digital port can be con
59. A 1 25 mA Overvoltage Protection 325 mV 600 mV Overcurrent Limit 45 mA 23 mA Programming Accuracy Overvoltage Protection 0 65 V 12 Overcurrent Limit 0 5 200mA 0 5 100 mA Current Monitor 2 5 120mA 1 5 60mA referenced to P common Fixed Mode Analog Current Programming Analog Programming 2 5 5mA 1 5 2 5 Ip to Ip Differential Input O0to 4V 0to 4V 0 to full scale Max common mode voltage 18 V 18 V referenced to OUT Nominal Input Impedance 20 KQ 20 Output Current Settling Time output recovery to within 1 5 A of an operating 5s 5 us point on the I V curve V 9096 of VMP after switching from a short circit to a fixed load Drift Temperature Stability change in output over 8 hours under constant Voltage 0 04 1 mV 0 04 2 mV load line and ambient following a 30 minute Current 0 1 0 8 mA 0 1 0 4 mA warmup Temperature Coefficients output change per C Voltage 0 01 250 UV 0 01 500 u V Current 0 02596 200 uA 0 025 100 HA Output Capacitance lt 100 nF lt 50 nF Maximum Capacitive Load for stable operation Simulator Table mode No Restriction No Restriction Fixed mode 2000F 200038 Modulation Accuracy for peak power tracker application see figure A 1 see figure A 1 96 Specifications and Application Inf
60. A lt string gt INITiate IMMediate CONTinuous bool MEASure CURRent DC VOLTage DC MEMory COPy TABLe name DELete ALL DELete lt name gt NAME name TABLe CATalog CURRent MAGNitude lt NRf gt POINts SELect lt name gt VOLTage MAGNitude lt NRf gt POINts OUTPut STATe lt bool gt PROTection CLEar DELay lt NRf gt Table 7 2 Subsystem Commands Syntax Resets the trigger system to the Idle state See Appendix B Enable disable front panel display 0 1 OFF ON Set display mode NORM TEXT Sets the text that is displayed Initiates the output trigger system Sets continuous initialization 0 1 OFF ON Returns dc current Returns dc voltage Copy selected table to non volatile memory with new name Delete all user defined tables Delete specified user defined table Returns names of all user defined tables Appends current points to selected table Returns number of current points in selected table Selects a table for subsequent table commands Appends voltage points to selected table Returns number of voltage points in selected table Enables disables the dc source output Reset latched protection Delay after programming before protection 0 to 32 767 Language Dictionary 69 Table 7 2 Subsystem Commands Syntax continued SOURce CURRent LEVel MMediate AMPLitude lt NRf gt TRIGgered AMPLitude
61. Agilent SAS responds to the 13 required common commands that control status reporting synchronization and internal operations The Agilent SAS also responds to five optional common commands controlling triggers power on conditions and stored operating parameters Subsystem Commands Subsystem commands are specific to Agilent SAS functions They can be a single command or a group of commands The groups are comprised of commands that extend one or more levels below the root The description of subsystem commands follows the listing of the common commands Language Dictionary 61 Description Of Common Commands Table 7 1 shows the common commands and queries These commands are listed alphabetically in the dictionary Ifa command has a corresponding query that simply returns the data or status specified by the command then both command and query are included under the explanation for the command If a query does not have a corresponding command or is functionally different from the command then the query is listed separately The description of each common command or query specifies any status registers affected In order to make use of this information you must refer to Chapter 4 Status Reporting which explains how to read specific register bits and use the information that they return Table 7 1 Common Commands Command Parameters Command Parameters Command Parameters CLS None OPC None SRE lt NRf gt ESE
62. CURR TABL NAME SOURce CURRent SASimulator IMP lt NRf gt lt ISC 0 configures the unit as a slave 0 8 X 8 16A for Agilent E4350B 0 8 X 4 08A for Agilent E4351B CURR SAS IMP 4 CURR SAS ISC 5 IMP 4 VOLT SAS VOC 60 VMP 50 CURR SAS ISC 0 IMP 0 VOLT SAS VOC 60 VMP 50 auto paralleled slave CURR SAS IMP NRI This command activates a user defined table when the unit is operating in Table mode If the unit is not in Table mode the specified table becomes the active table when Table mode is invoked If you send this command with a space as the table name it de selects the active table This allows the MEMory DELete ALL command to delete all tables in memory Command Syntax Parameter Examples Query Syntax Returned Parameters SOUR CURR TABL OFFS SOURce CURRent TABLe NAME name a valid table name or a space CURR TABL NAME curvel CURR TABL NAME lt CRD gt This command adds a current offset when operating in Table mode Command Syntax Parameter RST Value Examples Query Syntax Returned Parameters SOUR DIG DATA SOURce CURRent TABLe OFFSet lt NRf gt 0 to Imax 0 CURR TABL OFFSet 4 CURR TABL OFFS NRI This command sets and reads the Agilent SAS digital control port when that port is configured for Digital I O operation Configuring of the port is done via an internal jumper see Appendix D The port has three signal pins and a digital ground pin Pins and 2 are output pins
63. CURRent TABLe NAME Maximum Power lt 480 W AV AI 2 25 for Agilent E4350B gt 1 for Agilent E4351B Voc lt 65 Agilent E4350B 130V Agilent E4351B Isc lt 8A Agilent E4350B 4A Agilent E4351B The Vmp and Imp points are calculated internally and need not be supplied NOTE When the unit detects an invalid voltage current point it will generate an error light the ERR annunciator on the front panel and will not use the new parameters Instead it will operate with the last valid table settings Therefore although it may seem that the unit is operating correctly it will NOT be using the values that you have programmed for table mode Table Offsets A new table can be generated by applying a limited voltage or current offset to an existing table This can be helpful in simulating temperature angular rotational or aging changes Offset values are non cumulative they can be either positive or negative and can be applied to any table Each time a voltage or current offset is programmed a new I V curve is calculated based on the user defined table that is presently active and the supplied offset values Offset values affect the original I V curve as follows Positive Voltage Offsets The original curve is shifted to the right gt along the positive voltage axis and the first point on the curve is extended horizontally at Isc until it intersects the current axis Thus the new Voc equals the original Voc plus the off
64. E EXE DDE QYE 0 OPC Bit Weight 128 64 32 16 8 4 2 1 CME Command error DDE Device dependent error EXE Execution error OPC Operation complete PON Power on QYE Query error 62 Language Dictionary If PSC is programmed to 0 the ESE register bits are stored in nonvolatile memory The nonvolatile memory has a finite maximum number of write cycles see Supplemental Characteristics in appendix A Programs that repeatedly write to nonvolatile memory can eventually exceed the maximum number of write cycles and may cause the memory to fail Command Syntax ESE lt NRf gt Parameters 0 to 255 Power On Value See PSC Suffix None Example ESE 129 Query Syntax ESE Returned Parameters NR1 Register value Related Commands ESR PSC STB ESR Meaning and Type Event Status Register Device Status Description This query reads the Standard Event Status Event register Reading the register clears it The bit configuration of this register is the same as the Standard Event Status Enable register ESE See Chapter 4 Status Reporting for a detailed explanation of this register Query Syntax ESR Parameters None Returned Parameters NRI Register binary value Related Commands CLS ESE ESE OPC IDN Identification Query Meaning and Type Identification System Interface Description This query requests the Agilent SAS to identify itself It returns a string composed of four fields separated by comm
65. EIHE ERR IERI RS 38 Stand Alone Connections 2 toc reris Dr On De Pte rip sure e RR e 38 Linked Connections etna iR ERU UE e tUe RU iet eR Et bite I S R e 38 Front Panel Operation Introd ction neo Deep shiva ER 41 FUNCUHIONS Je T snes 41 Programming the OUtp t eet re chen 44 Establishing Initial Conditions essent 44 Programming Voltage 2e rr ERE REP EP DER sunt EORR SERRE 44 Progr mmmne C rrent Deo Deo T p 45 Programming Overvoltage Protection eeeeeeeseeeeeseee eene ener nest eren 45 Setting the OVP ueleg detention eie ied 45 Checking OVP Operation ente Dno met lr re RU E DI RO Se PSESE ksen 45 Clearing the OVE Condition E en tio lebt 46 Programming Overcurrent Protection essent ener neee trennen trente 46 Setting the OCP Protection eerie e tee edet ode Eee IR Tete tete REL 46 Checking OCP Operation 2 ree e HE rr p Re DUE ey pe 46 Clearing the OCP Condition ond ee cott ete ite ce e ERE e Un Ur E o ce EU UR 46 CV Mode vs CC Mode tc knees Ri eet atr a eS EAT
66. ERE RO D DER op ERE HR rep D Pe Ie HERE RR 87 Register Cormands do d gue a iesu te ER nere on 87 Questionable Status Group eee e e ett tegere bei cei It eee a re Rire cb ine 89 Register Functions Bales Sea 89 Register Commands eee EREMO DEREN soe RR RUE ERR ENG RO TRE rp 89 Standard Event Status Groups e e dee eie sd eevee se npe 89 Register F nctlons 2 89 Register Commands eoe ote eR re Uster E ge Ene OPER ene 89 Status Byte Register ec iere re RR E HORE CER orbe eae Re Ue keep 89 The ROS eG oa Rete gae aen en UU Dee n Nt eI nde 90 The MSS MC En 90 Determining the Cause of a Service 90 S rvice Request Enable Register e tenemento bere c Ee ESEESE EE IE t dee 90 90 Initial Conditions at nennen rennen enne en 90 Status Registers 5 eun RR ROUES NEED DNI NUR tad 90 The PON Pover ON Bit nente ER ette c Uri A p n esie 91 Exampl 4 eite pero eum iic testem eee cae ioe nay see tie i Ri SEES 91 Servicing an Operation Status Mode Event sss eene nennen eene enne 91 Adding More Operation Events sse nennen nennen 91 Servicing Questionable Sta
67. ERROR Note The initial factory default password is the model number of the Agilent SAS but it can be changed see Changing the Password Entering Voltage Calibration Values Make certain the DVM is the only load on the Agilent SAS Meter mode Select the first calibration point by pressing VRDGI If the Agilent SAS is not in CV mode an error occurs WRONG MODE Read the DVM and use the Entry keypad to enter the first voltage value Meter mode Verification and Calibration 109 Table B 5 Typical Front Panel Calibration Procedure continued 4 Select the second calibration point by pressing again 5 Read the DVM and use the Entry keypad to enter the second voltage value Note If one of the entered values is not within acceptable range an error occurs The Agilent SAS is now holding the new voltage calibration constants in RAM Calibrating the OVP Trip Point 1 Make certain the voltage has been calibrated and there is no load on the Agilent SAS 2 Select OVP calibration by pressing vCal 3 Wait for the Agilent SAS to compute the OVP calibration constant If the supply goes unregulated or into CC mode during OVP calibration an error occurs If the computed constant is out of acceptable range an error occurs The Agilent SAS is now holding the new OVP calibration constant in RAM Entering Current Calibration Values 1 Make certain appropriate shunt resistor see Table 1 is the only load on the Agilent SAS 2
68. Fixed mode Program only the first or master unit in the series the current of the slave units automatically track the master s current Set the slave unit s current limit to zero and its voltage and OVP settings higher than the maximum voltage setting of the master unit This ensures that the slave supplies will operate in CC mode Functions such as status voltage readback and current readback can still be read back individually for each unit Auto Parallel Programming Cautions To avoid possible tripping of the crowbar SCR do not turn power off on auto parallel units while they are operating in Simulator or Table mode Reprogram all units to Fixed mode and set the voltage to zero before turning them off If a slave unit experiences a shutdown condition such as overtemperature or overcurrent it will not automatically shut down other units unless you have connected and enabled the remote inhibit RI and discrete fault indicator DFI operation See appendix C and Questionable Status group in chapter 8 Also use caution when connecting three or more Agilent SAS units for auto parallel operation because of the OVP crowbar circuits If the OVP circuit of any unit trips its crowbar circuit will draw current from all of the other units Depending on the number of units the additional current may damage the internal SCR of the tripped unit Use one of the following techniques to avoid problems 1 Program the OVP of all slave units to the Max
69. Functions Error Messages Hardware Error Messages Front panel error messages resulting from selftest errors or runtime failures are described in chapter 3 Turn On Checkout Calibration Error Messages Front panel error messages resulting from calibration errors are described in appendix B System Error Messages System error messages are obtained remotely with the SYST ERR query or by pressing the front panel key The error number is the value placed in the error queue SYST ERR returns the error number into a variable and combines the number and the error message into a string Table D 1 lists the system errors that are associated with SCPI syntax errors and with interface problems Information inside the brackets is not part of the standard error message but is included for clarification When system errors occur the Standard Event Status register see chapter 8 records them as follows Bit Set Error Code Bit Set Error Code Error Type Standard Event Status Register Error Bits 5 100 thru 199 Command 3 300 thru 399 Device dependent 4 200 thru 299 Execution 2 400 thru 499 Query Table D 1 Summary of System Error Messages Error Error String Description Explanation Examples Number 100 Command error generic command error 101 Invalid character 102 Syntax error unrecognized command or data type 103 Invalid separator illegal character encountered in p
70. INPUT IN OUT 2 4 INH COMMON COMMON D Insert Wires Tighten Screws Factory default function is FAULT INHIBIT Figure 4 2 Rear Panel Digital Connector Load Connections PAS J z RA NW I r IP IPSAS P MS S H 2 aa P M4 x 0 7 x 8mm 3 J Output Safety Cover Oe Output Terminal Output Terminal Chassis ground Earth _ Output Sense Switch Analog Connector Figure 4 3 SAS Rear Panel Output Connections Output Isolation The output of the Agilent SAS has dc isolation from earth ground Either output terminal may be grounded or an external voltage source may be connected between either output and ground However both output terminals must be kept within 240 of ground An earth ground terminal is provided on the rear panel for convenience such as grounding wire shields The earth ground terminal on the rear panel is a low noise signal ground for convenience only It is not designed to function as a safety ground Capacitive Loads In Fixed Mode Operation the maximum external capacitance that may be added to the output without causing instability is 2 000 uF This is also the maximum capacitance value that can be safely discharged by the OVP overvoltage protection circuit 30 User Connections Because of its high output voltage the Agilent E4351B generates high currents when
71. L SEL MEM TABL SEL curvel MEM TABL CURR MEM TABL VOLT These commands program a list of current or voltage points for a new table A table must have at least 3 points A maximum of 100 comma separated points may be entered each time the commands are used Repeatedly sending this command will append additional points to the end of the table up to a maximum of 4000 points A maximum of 30 tables can be stored in volatile memory Volatile memory has 30 000 table points available to be shared among all tables If you are programming a slave unit that is paralleled to a master unit you must send the same values to the slave unit However you must append a 999 to the end of the current string and a 999 to the end of the voltage string These values configure the unit as a slave Command Syntax MEMory TABLe CURRent MAGNitude lt Nrf gt MEMory TABLe VOLTage MAGNitude lt Nrf gt Parameters 0 to maximum current or voltage rating current values must be entered in equal or in descending order voltage values must be entered in ascending order Default Value 0 Examples MEM TABL CURR 7 8 7 7 7 5 7 6 5 5 5 4 3 2 1 MEM TABL CURR 7 8 7 7 7 5 7 6 5 5 5 4 3 2 1 999 paralleled slave unit MEM TABL VOLT 5 35 45 50 52 54 56 57 58 59 MEM TABL VOLT 5 35 45 50 52 54 56 57 58 59 999 paralleled slave unit Language Dictionary 73 MEM TABL CURR POIN MEM TABL VOLT POIN These commands return the number of current or voltage points in the act
72. None Query Syntax None Examples OUTP PROT CLE OUTPUT PROTECTION CLEAR 74 Language Dictionary OUTP PROT DEL This command only applies in Fixed mode It sets the time in seconds between the programming of an output change that produces a CV CC or UNREG condition and the recording of that condition by the Status Operation Condition register The delay prevents the momentary changes in Agilent SAS status that can occur during reprogramming from being registered as events by the status subsystem Since the delay applies to CC status it also delays the OCP Fixed mode overcurrent protection feature The OVP overvoltage protection and the OC overcurrent level is not affected by this delay Command Syntax OUTPut PROTection DELay lt NRf gt Parameters 0 to 32 767 MIN MAX Units seconds RST Value 0 Examples OUTPUT PROTECTION DELAY 75E 1 Query Syntax OUTPut PROTection DELay OUTPut PROTection DELay MIN OUTPut PROTection DELay MAX Returned Parameters NR3 OUTP PROT DEL returns value of programmed delay OUTP PROT DEL MIN and OUTP PROT DEL MAX return the minimum and maximum programmable delays Related Commands RST RCL SAV CURR PROT STAT SOUR CURR SOUR CURR TRIG These commands only apply in Fixed mode They set the immediate current level or the pending triggered current level of the Agilent SAS The immediate level is the current programmed for the output terminals The pending triggered level is a stored c
73. OPERATING GUIDE for SOLAR ARRAY SIMULATOR AGILENT MODELS E4350B E4351B Agilent Technologies Agilent Part No 5962 8206 Printed in Malaysia Microfiche 5962 8207 September 2004 CERTIFICATION Agilent Technologies Company 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 one year from date of delivery Agilent software and firmware products which are designated by Agilent 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 Company will at its option either repair or replace products which prove to be defective Agilent 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 returned to a service facility desi
74. RST For CURR TRIG ABOR CURR RST Language Dictionary 75 SOUR CURRent MODE This command selects the operating mode of the Agilent SAS The choices are FIXed In Fixed mode the output is a fixed rectangular I V characteristic The output capacitance is 100 nF on the Agilent E4350B and 50 nF on the Agilent E4351B which optimizes the unit as a constant current source To use the unit as a low impedance constant voltage source you can add an external output capacitor if desired the value of which should not exceed 2 000 uF Fixed mode is the power on default mode SASimulator Simulator mode uses an exponential model to approximate the I V curve It is programmed in terms of its open circuit voltage Voc short circuit current Isc voltage point Vmp and current point Imp at approximately the peak power point All of these parameters are set using separate SCPI commands see chapter for more information about Simulator mode TABLe Table mode sets the output characteristics by a user defined table of voltage current points A curve is generated by connecting the points by straight lines Therefore the more points that are provided the more the connected points will resemble a curve Maximum number of tables 30 volatile and 30 nonvolatile Maximum table size per table 4 000 points Maximum non volatile table points available for all tables 3 500 points Maximum volatile table points available for all tables
75. Readback 90 mV Vep mV 90 mV 845 uV Current Programming and Readback Low Current 0 A 20 mA Ipvm mA 20 mA 16 uA Front Panel Display Readback Ipvm 28 mA Ipp mA Ipvm 28 mA 16 uA High Current 8 A 7 964 A 8 036 A 2 5mA Front Panel Display Readback Ipvm 44 mA Irr mA Ipvm 44 mA 2 5 mA Verification and Calibration 107 Table B 4 Operation Verification Test Parameters continued Test Description Minimum Spec Results Maximum Measurement Spec Uncertainty MODEL Agilent E4351B Voltage Programming and Readback Low Voltage 0 V 20 mV mV 20 mV 2 0 UV Front Panel Display Readback 84 mV mV 84 mV 2 0 UV High Voltage 60 V 119 89 V V 120 11 V 1 7 mV Front Panel Display Readback Vbvm 180 mV Vep mV 180 mV 1 7 mV Current Programming and Readback Low Current 0 A 10 mA mA 10 mA 15 pA Front Panel Display Readback 14 mA Ipp mA Ipvm 14 mA 15 pA High Current 8 A 3 982 A 4 018A 586 uA Front Panel Display Readback Ipvm 22 mA Ip mA Ipvm 22 mA 586 uA Enter your test results in this column Calibration Important The Agilent SAS can only be calibrated in Fixed mode Mode switching is accomplished over the GPIB bus via the SCPI CURRent MODE command The Agilent SAS may be calibrated either from the front panel or from a controller over the GPIB The procedure
76. Straffordshire ST7 1TL United Kingdom Safety Information and Conforms to the following safety standards IEC 61010 1 2001 EN 61010 1 2001 Canada CSA C22 2 No 1010 1 1992 UL 61010B 1 2003 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 or Agilent Technologies Deutschland GmbH Herrenberger StraBe 130 D71034 B blingen Germany Revision B 00 00 Issue Date Created on 11 24 2003 3 26 Document No 6x4yA6x5yAE435xA b 11 24doc doc To obtain the latest Declaration of Conformity go to http regulations corporate agilent com and click on Declarations of Conformity 5 Table Of Contents General Information Whbat sIn Tins Guide ics eee pre eo org ti pie te ett ean n e e 13 Safety Considerations ete eU ee b I teet t e EU aeree te pei 13 Options and ACCeSSOTIES ite pe ERO E eee EE m ed Ee eed ED eredi Eee E de 13 Operator Replaceable Parts rre net ote ree er e hr RR eire DER 14 DESCHIP TOM 3 eene steve baie corer hae eee 14 Key Beatures eoe E e p Eee ie 14 Output Characteristic nep od deen Shae eae ae A ea whale be Bee 15 Fixed Mode bU tbe seduce sects
77. The Agilent SAS cannot use a standard power cord The power cords supplied by Agilent Technologies have heavier gauge wire Analog A 7 terminal analog plug see table 1 3 in chapter 1 that connects to the back of the unit Analog connector connections are described in chapter 4 Digital A 4 terminal digital plug see table 1 3 in chapter 1 that connects to the back of the unit Digital connector connections are described in appendix C Digital Port Functions Serial cable A 2 meter cable see table 1 2 in chapter 1 that connects to the control bus next to the GPIB connector This cable is used to serially connect multiple supplies as described under Controller Connections in Chapter 4 Change page If applicable change sheets may be included with this guide If there are change sheets make the indicated corrections in this guide Location and Temperature Bench Operation The Supplemental Characteristics in appendix A give the dimensions of your Agilent SAS 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 Agilent SAS must be installed in a location that allows sufficient space at the sides and rear of the cabinet for adequate air circulation Minimum clearances are 1 inch 25 mm along the sides Do not block the fan exhaust at the rear of the unit Installation 19 Rack Mounting The Agilent SAS c
78. Voc Vmp The Agilent SAS is shipped with the switch in the Local position Remote sensing is obtained by placing the SENSE switch see Figure 4 3 in the Remote position Connect the positive side of the load to the S analog connector pin and the negative side of the load to the S analog connector pin see Figure 4 1 Connect the sense leads carefully so that they do not become open circuited If sense leads are left open during operation the unit will regulate at the output terminals instead User Connections 31 of at the load but with a 3 to 5 increase in voltage at the output terminals Bundle or tie wrap the load leads to minimize inductance and reduce noise pickup CV Regulation The Fixed mode voltage load regulation specification in appendix A applies at the output terminals of the Agilent SAS When remote sensing this specification must be adjusted by adding 3 mV to the voltage load regulation specification for each 1 volt change in the positive load lead due to a change in load current Because the sense leads are also part of the unit s feedback path keep the resistance of the sense leads low in order to obtain the best performance The additional load regulation due to resistance in the sense leads is given by the formula total load lead drop total sense lead resistance K Regulation in millivolts where K 3 for E4350B 7 for E4351B Overvoltage Protection Considerations The OVP circuit senses the voltage
79. ables the calibration mode The calibration mode must be enabled before the Agilent SAS will accept any other calibration commands The first parameter specifies the enabled or disabled state The second parameter is the password It is required if the calibration mode is being enabled and the existing password is not 0 If the second parameter is not entered or is incorrect an error is generated and the calibration mode remains disabled The query statement returns only the state not the password Note that whenever the calibration mode is changed from enabled to disabled any new calibration constants are lost unless they have been stored with CAL SAVE Command Syntax CALibrate STATe bool lt NRf gt Parameters 0 OFF I 11 ON lt NRf gt RST Value OFF Examples CAL STAT 1 4350 CAL STAT OFF Query Syntax CALibrate STATe Returned Parameters 1011 Related Commands CAL PASS CAL SAVE CAL VOLT This command is used to calibrate the output voltage The command enters voltage value that you obtain from an external meter If you are entering the voltage value allow time for the DVM to stabilize You must first select a calibration level CAL VOLT LEV for the value being entered Two successive values one for each end of the calibration range must be selected and entered The Agilent SAS then computes new voltage calibration constants These constants are not stored in nonvolatile memory until saved with the CAL SAVE command Command
80. ac line voltage 12 A 2110 0249 Screw carrying strap M5x0 8x10 mm 0515 1132 220 230 240 Vac line voltage 7 A 2110 0614 Standoff GPIB 0380 0644 Knob rotary output control 0370 3238 Description The Agilent E4350B E4351B Solar Array Simulator SAS is a dc power source that simulates the output characteristics of a solar array The Agilent SAS is primarily a current source with very low output capacitance It is capable of simulating the I V curve of a solar array under different conditions such as temperature and age The I V curve is programmable over the IEEE 488 2 bus and is automatically generated within the Agilent SAS The Agilent SAS has three operating modes Fixed Mode This is the default mode that occurs when the unit is first powered up The I V output has the rectangular characteristics of a standard power supply but with excellent high speed constant current characteristics and low output capacitance Fixed mode allows front panel programming and is convenient when in certain applications the I V curve is not needed Simulator Mode An internal algorithm is used to simulate a SAS I V curve One can easily approximate the curve through four input parameters open circuit voltage Voc short circuit current Isc current at the approximate maximum power point on the curve Imp and voltage at the approximate maximum power point on the curve Vmp Table Mode The Agilent SAS provides a table mode for a fast and accurate I V simulati
81. ad leads In noisy environments it may be necessary to shield the sense leads Ground the shield only at the Agilent SAS Do not use the shield as one of the sense conductors Stability In Simulator and Table modes the unit is stable with constant current constant resistance constant voltage and any capacitive loads Inductive loads should be kept less than 2004H In Fixed mode the unit is stable if the output capacitance is less than 2000LF 32 User Connections Over Current Protection Considerations The front panel overcurrent protection OCP is functional only when the Agilent SAS is operating in Fixed mode This is because the normal function of the OCP circuit when enabled is to turn the output of the Agilent SAS off whenever the unit changes from constant voltage operation to constant current operation Since constant current mode is the normal operating state of both Simulator and Table modes the OCP key is disabled to prevent the output from turning off Note that even though OCP is disabled the OCP annunciator still lights when the OCP key is pushed in Simulator and Table modes The OCP protection level is the same as the output current limit setting When the OCP is enabled in Fixed mode and the operating mode of the unit changes from constant voltage to constant current the OCP circuit trips and turns the output off in approximately 200 milliseconds This delay time can be adjusted with the OUTPut PROTection DELay command T
82. akes effect in Fixed mode All other functions such as Local Error Output On Off Protect are active while the unit is operating in Simulator mode Table Mode In Table mode the output characteristic is determined by a user defined table of voltage current points see Figure 1 3 Table mode operation is achieved by sampling the output voltage applying a low pass filter and continually adjusting the constant current loop by using the filtered voltage as an index into the stored table of points Linear interpolation is used to set the current when the filtered voltage does not have an exactly matching table entry What this means is that the I V curve is generated by connecting the points in the table by straight lines The more points that you provide the more accurate the curve will be when the points are connected A E4351B 4A MAXIMUM CURRENT E4350B 8A sc 480W MAX TYPICAL CURVE MAXIMUM VOLTAGE NS Av Se 10 min 4351 POINTS UNDER EN 250 min E4350B DASHED LINE NY ARE INVALID gt 120V 130V E4351B 60V 65V E4350B Figure 1 3 Table Mode Characteristic Each table can have a maximum of 4 000 output points 3 500 points if it will be stored in non volatile memory Each output point is defined by a voltage current coordinate pair of values that define the location of the point on the curve The first value is the voltage the second value is the
83. allel Sequential commands finish execution before a subsequent command begins Parallel commands allow other commands to begin executing while the parallel command is still executing Commands that affect trigger actions are among the parallel commands The WAL OPC and OPC common commands provide different ways of indicating when all transmitted commands including any parallel ones have completed their operations The syntax and parameters for these commands are described in chapter 7 Some practical considerations for using these commands are as follows WAI This prevents the Agilent SAS from processing subsequent commands until all pending operations are completed OPC This places a 1 in the Output Queue when all pending operations have completed Because it requires your program to read the returned value before executing the next program statement OPC can be used to cause the controller to wait for commands to complete before proceeding with its program OPC This sets the OPC status bit when all pending operations have completed Since your program can read this status bit on an interrupt basis OPC allows subsequent commands to be executed Note The trigger subsystem must be in the Idle state in order for the status OPC bit to be true Therefore as far as triggers are concerned OPC is false whenever the trigger subsystem is in the Initiated state DFI Discrete Fault Indicator Whenever a fault is detected in the Agilent
84. an be mounted in a standard 19 inch rack panel or cabinet Rack mounting kits are available as Option 908 or 909 with handles Installation instructions are included with each rack mounting kit Support rails are required when rack mounting the Agilent SAS see table 1 1 Temperature Performance A variable speed fan cools the unit by drawing air through the sides and exhausting it out the back Using Agilent rack mount or slides will not impede the flow of air The Agilent SAS operates without loss of performance within the temperature range of 0 C to 40 C and with derated output current from 40 C to 55 C see appendix A If the Agilent SAS is operated at full output current for several hours the sheet metal immediately under WARNING the transformer near the right front can get very hot Do not touch this area of the cabinet The line cord also can become quite warm Both of these conditions are normal AC Line Connection Refer to the applicable paragraphs below for information on the ac line Do not apply power to the Agilent SAS until directed to do so in Chapter 3 CAUTION Check the line Rating label on the rear of your unit and verify that the voltage shown there corresponds to the nominal line voltage of your ac line If it does not see AC Line Voltage Conversion for instructions on changing the Agilent SAS line voltage configuration The supplied cord connects to the power receptacle on the rear panel Figure 2 1
85. anguage then you probably can go directly to chapter 7 Language Dictionary Conventions The following conventions are used throughout this chapter Angle brackets lt gt Items within angle brackets are parameter abbreviations For example NRI indicates a specific form of numerical data Vertical bar Vertical bars separate one of two or more alternative parameters For example OIOFF indicates that you may enter either 0 or OFF for the required parameter Square 1 Items within square brackets are optional The representation Brackets SOURce CURRent means that SOURce may be omitted Braces 5 3 Braces indicate parameters that may be repeated zero or more times It is used especially for showing arrays The notation lt A gt lt B gt shows that is a required parameter while B may be omitted or may be entered one or more times Boldface font Boldface font is used to emphasize syntax in command definitions TRIGger DELay lt NRf gt shows a command syntax Computer font Computer font is used to show program text within normal text TRiGger DELay 5 represents program text Remote Programming 49 Types of SCPI Commands SCPI has two types of commands common and subsystem commands see table 7 1 generally are not related to specific operation but to controlling overall Agilent SAS functions such as reset status and synchronization All common commands consist of a three letter mnemonic p
86. as Query Syntax IDN Returned Parameters lt AARD gt Field Information Agilent Technologies Manufacturer EnnnnB 6 character model number USnnnnnnnn 10 character serial number or 0 R xx xx Revision levels of firmware Example AGILENT TECHNOLOGIES E4350B 0 A 00 01 Related Commands None Language Dictionary 63 OPC Meaning and Type Operation Complete Device Status Description This command causes the interface to set the OPC bit bit 0 of the Standard Event Status register when the Agilent SAS has completed all pending operations See ESE for the bit configuration of the Standard Event Status register Pending operations are complete when All commands sent before OPC have been executed This includes overlapped commands Most commands are sequential and are completed before the next command is executed Overlapped commands are executed in parallel with other commands Commands that affect output voltage current or state relays and trigger actions are overlapped with subsequent commands sent to the Agilent SAS Any change in the output level caused by previous commands has been completed All triggers are completed OPC does not prevent processing of subsequent commands but Bit 0 will not be set until all pending operations are completed Command Syntax OPC Parameters None Query Syntax None Related Commands OPC ESE OPC Meaning and Type Operation Complete Device Status Description This
87. at the output terminals not at the sense terminals With remote sensing the voltage sensed by the OVP circuit will be higher than the voltage being maintained at the load Therefore when using remote sensing you must program the OVP high enough to compensate for the expected voltage drop between the output and the load Output Rating The rated output voltage and current specification in appendix A applies at the output terminals of the Agilent SAS With remote sensing any voltage dropped in the load leads causes the unit to increase the voltage at the output terminals so it can maintain the proper voltage at the load see Remote Voltage Sensing If you attempt to operate at the full rated output at the load this may force the voltage at the output terminals to exceed the unit s rated output This will not damage the unit but may trip the OVP overvoltage protection circuit which senses the voltage at the output When operated beyond its rated output the unit s performance specifications are not guaranteed although typical performance may be good If the excessive demand on the unit forces it to lose regulation the Unr annunciator will indicate that the output is unregulated Output Noise Any noise picked up on the sense leads also appears at the output of the Agilent SAS and may adversely affect the load voltage regulation Be sure to twist the sense leads to minimize external noise pickup and route them parallel and close to the lo
88. ation in appendix A Default Suffix A Examples CAL CURR 32 33 A CAL CURR DATA 5 00 Related Commands CAL SAVE CAL STAT CAL CURR LEV This command sets the Agilent SAS to a calibration point that is then entered with CAL CURR DATA During calibration two points must be entered and the low end point MIN must be selected and entered first Command Syntax CALibrate CURRent LEVel MINIMAX Parameters lt CRD gt IMINimum IMA Ximum Examples CAL CURR LEV MIN CAL CURR LEV MAX Related Commands CAL CURR DATA CAL STAT CAL PASS This command enters a new calibration password The command is active only when the Agilent SAS is already in the calibration mode Unless it is changed subsequently to shipment the password is the Agilent SAS s model number If the password is set to 0 password protection is removed and CAL STAT ON is unrestricted A new password is automatically stored in nonvolatile memory and does not have to be stored with the CAL SAVE command Command Syntax CALibrate PASScode lt NRf gt Parameters lt NRf gt Examples CAL PASS 4350 CAL PASS 09 1993 Related Commands CAL STAT CAL SAVE This command saves any new calibration constants after a current or voltage calibration procedure has been completed in nonvolatile memory Command Syntax CALibrate SAVE Parameters None Examples CAL SAVE Related Commands CAL CURR CAL VOLT CAL STAT 112 Verification and Calibration CAL STAT This command enables and dis
89. ative clamp circuit minimizes output voltage overshoots when the output of the Agilent SAS is quickly unloaded Reference Settings Agilent E4350B Agilent E4350B Waveforms Vot Current Vmp 60V Imp 7 5 Isc 8A Pmp 450 Voltage Circuit Diagram 81 000 us 6 000 vs 10 131 us 5 00 us DIV REPE IVE ufi Measurements c4 8 84690 v Vavg 3 47844 V Sensitivity Position Probe Coupling Impedance Channel 4 4 03 V div 4 00000 Y 91 6 1 dc 1M ohm Sensitivity Position Math Function 1 20 0 80 0000 v channeli INVERTED Shunt Switching Regulation In this application regulation across the load is achieved by controlling the duty cycle of a shunt FET which can be operated at frequencies as high as 50kHz Note the relatively clean output current waveform which can be attributed to the fast dynamic response and low output capacitance of the Agilent SAS Reference Settings Agilent E4351B Agilent 4351 W velonms e Current 120V oN 22 244 Imp 3 75A Isc 4A Pmp 450W Voltage Circuit Diagram lout HPSAS 4 700 729 700 US 4 7 us 20 300 vs nUc 5 00 us DI REPETE TIVE uc 4 Sensitivity Position Probe Coupling Impedance Channel 1 20 0 V div 60 0000 V 10 1 de 1M ohm Channel 4 2 00 V div 0 00000 V 100 1 de 50 ohm E 104 Specifications and Application Information Verification and Calibration Introd
90. can exercise program control without interrupts by reading specific registers STAT OPER 1280 EVEN Enable only the CV and CC events and read their status STAT OPER ENAB 1313 PTR 1313 EVEN Enable all conditions of the Operation Status register and read any events STAT OPER ENAB EVENT Read which events are active and which events are enabled in the STAT QUES ENAB EVEN ESE ESR Operation Questionable and Standard Event status registers Note The last query string can be handled without difficulty However should you request too many queries the system may return a Query DEADLOCKED error 430 In that case break the long string into smaller parts Programming the Digital I O Port Digital control ports 1 and 2 are TTL outputs that can be programmed either high or low Control port 3 can be programmed to be either a TTL input or a TTL output Send a decimal parameter that translates into the desired straight binary code for these ports See DIG DATA VAL in chapter 7 for the port bit configurations DIG DATA 3 Set ports 1 and 2 high and make 3 another output port DIG DATA 7 Set ports 1 and 2 high and make 3 an input port DIG DATA Read back the present port configuration System Considerations The remainder of this chapter addresses some system issues concerning programming These are addressing and the use of the following types of GPIB system interfaces 1 HP Vectra PC controller with Agilent 82335A GPIB Interface Co
91. ce VOLTage SASimulator VOC lt NRf gt 0 to 65V for Agilent E4350B 0 to 130V for Agilent E4351B Vmax VOLT SAS VOC 60 SOURce VOLTage SASimulator VOC lt NRI gt VOLT SAS VMP This command sets the voltage at the peak power point in Simulator mode If you are programming a slave unit that is paralleled to a master unit you must set the same Vmp value to the master and the slave unit Command Syntax SOURce VOLTage SASimulator VMP lt NRf gt Parameters lt VOC RST Value 0 8 X 61 5V for Agilent E4350B 0 8 X 123V for Agilent E4351B VOLT SAS VMP 50 SOURce VOLTage SASimulator VMP lt NRI gt VOLT SAS VOC Examples Query Syntax Returned Parameters Related Commands Language Dictionary 79 SOUR VOLT TABL OFFS This command adds a voltage offset when operating in table mode Command Syntax SOURce VOLTage TABLe OFFSet lt NRf gt Parameter 0to VMAX RST Value 0 Examples VOLT TABL OFFSet 4 Query Syntax VOLT TABL OFFS Returned Parameters lt NRI gt Status Subsystem This subsystem programs the Agilent SAS status registers The Agilent SAS has three groups of status registers Operation Questionable and Standard Event The Standard Event group is programmed with Common commands as described in Chapter 4 Status Reporting The Operation and Questionable status groups each consist of the Condition Enable and Event registers and the NTR and PTR filters See chapter 4 for more information about these reg
92. checkout procedure in chapter 3 That chapter describes how to perform basic functions from the control panel Operations that you can perform are Enabling or disabling the Agilent SAS output Setting the output voltage and current Monitoring the output voltage and current Setting the overvoltage protection trip point Enabling the overcurrent protection circuit OCP Clearing protection functions Saving operating states in nonvolatile memory Recalling operating states from nonvolatile memory Setting the Agilent SAS GPIB bus address Displaying error codes created during remote operation Enabling local front panel operation Calibration see appendix B Key Functions The front panel is summarized in Figure 5 1 and Table 5 1 Some keys have two functions For example the System key can be used either to recall a stored operating state or to store an operating state The first operation is shown on the key and the second shifted operation is shown in blue above the key In order to do a shifted operation first press the solid blue key which is unlabeled but shown throughout this manual as shift For example for a recall operation press the recall key Recai For a save operation press the Save key which is Recall When you do this the Shift annunciator will light to remind you that the key is now functioning as the key In this chapter such a shifted operation may be shown simply as Save 2
93. current If no point is supplied for V 0 the current associated with the lowest voltage entry point is defined as Isc and the curve will be extended horizontally to the current axis If no point is supplied for I 0 the slope that was determined by the last two current entry points will be extended to the voltage axis Multiple tables can be defined and saved in non volatile memory which is limited to 3500 points or volatile memory which is limited to 30 000 points Up to 30 tables can be saved in each memory Restrictions W The number of points in a table can vary from 3 to 4000 but an equal number of voltage and current values must be sent Otherwise an error will occur when the table is selected with Use MEMory TABLe CURRent POINts and MEMory TABLe V OLTage POINts to find the length of an existing table Points must be above dashed line shown in Figure 1 3 General Information 17 m There is no restriction on the spacing between points in either voltage or current but the points must be monotonic Voltage values must be sent in increasing order of magnitude current values must be sent in equal or decreasing order of magnitude For an Agilent E4350B for example 1 8 50 7 8 55 7 5 56 7 57 6 58 4 59 1 Each table point when combined with the table offset cannot exceed the unit s maximum voltage current or power A table cannot be deleted or redefined while it is selected with
94. d over the GPIB bus via the SCPI CURRent MODE command You cannot switch modes from the front panel Note The Agilent SAS must be connected to a computer for you to be able to use the SAS functions that are available in simulator and table modes The front panel does not indicate which mode the Agilent SAS is presently operating in If you are unsure which mode the unit is presently in you can query the unit over the GPIB using the CURRent MODE command If you cycle power to the unit it will be in Fixed mode Fixed Mode At power turn on with RST or when executing a Device Clear the operating state of the Agilent SAS is Fixed mode see Figure 1 1 In Fixed mode the output characteristic is similar to that of a standard power supply except that the output capacitance is lt 100 nF on the Agilent E4350B and lt 50 nF on the Agilent E4351B This low output capacitance is ideal when using the unit as a constant current source To use the unit as a low impedance constant voltage source however you can add an external output capacitor if so desired The value of the external capacitor should not exceed 2 000 uF E4351B 4A MAXIMUM CURRENT ce 490W MAX E4350B 8A is TYPICAL FIXED MODE OUTPUT se MAXIMUM VOLTAGE y 0 Vset 120V E4351B 60V E4350B Figure 1 1 Fixed Mode Characteristic Restrictions W Ifthe programmed values exceed the maximum current and voltage boundaries by more than 2 or 3 percent a
95. duct is set to match the available line voltage and the correct fuse is installed GROUND THE INSTRUMENT 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 For instruments designed to be hard wired to the ac power lines supply mains connect the protective earth terminal to a protective conductor before any other connection is made 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 If the instrument is to be energized via an external autotransformer for voltage reduction be certain that the autotransformer common terminal is connected to the neutral earthed pole of the ac power lines supply mains 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 gases or fumes KEEP AWAY FROM LIVE CIRCUITS Operating personnel must not remove instrument covers Component replacement and internal adjustmen
96. e 0 8 V max High level input voltage 2 0 V min GPIB Interface Capabilities Languages SCPI Interface C0 DTI E1 LEA PPO RL1 8 1 5 TE6 Serial Link Capabilities multiple supplies sharing Max number of units 16 one GPIB primary address Max number of linked units 15 Max total chain length 30 m 100 ft Calibration Interval recommended 1 year from date the unit is put into service Regulatory Compliance Certified to Conforms to Complies with UL 3111 1 CSA 22 2 No 1010 1 IEC 1010 1 EMC directive 89 336 EEC ISM Group Class Listing pending 132 6 mm 5 22 in 425 5 mm 16 75 in 497 8 mm 19 6 in Dimensions see figure 3 1 Height Width Depth with safety cover Weight Net Shipping 25 kg 54 lbs 28 kg 61 Ibs 98 Specifications and Application Information Output Impedance Graphs Simulator Mode The following six output impedance graphs were generated at three points on both Agilent SAS models while operating in simulator mode with the reference settings indicated below The reference curve shows the location of the three sample points on which the output impedance graphs are based Agilent Agilent Reference Curve Voc 4350 E4351B 65 130V Imp 60 120V hc 75A 3 75 450W 450W Tout 4 2 2 1 0 10 20 30
97. e If it fails again investigate the reason for the failure The line fuse is located on the rear panel To change the fuse proceed as follows 1 Turn off the front panel power switch 2 Using a screwdriver remove the fuse from the fuseholder Replace it with one of the same type see table 1 3 in chapter 1 3 Turn on the Agilent SAS and check the operation Error Messages Agilent SAS failure may occur during power on selftest or during operation In either case the display may show an error message that indicates the reason for the failure Selftest Errors When a selftest error occurs it prevents all front panel operation The display may show either a power on error message or a checksum error message Power On Error Messages Power on messages appear as Where n is a number listed in Table 3 3 If this occurs turn the power off and then back on to see if the error persists It is possible to recover from the EE CHKSUM error see Checksum Errors If any other message persists the Agilent SAS requires service Turn On Checkout 27 Table 3 3 Power On Selftest Errors Error Display Failed Test Error Display Failed Test No No El FP RAM Front Panel RAM E8 SEC RAM Secondary RAM E2 FP ROM Front Panel ROM checksum E9 SEC ROM Secondary ROM checksum E3 EE CHKSUM EEPROM E10 SEC5V Secondary 5 V ADC reading E4 PRI XRAM Primary external RAM Ell TEMP Secondary ambient ES
98. e 0 Examples STAT QUES ENAB 20 STAT QUES ENAB 16 Query Syntax STATus QUEStionable ENABle Returned Parameters lt NRI gt Register value Related Commands STAT QUES 82 Language Dictionary STAT QUES NTR PTR Commands These commands allow you to set or read the value of the Questionable NTR Negative Transition and PTR Positive Transition registers These registers serve as polarity filters between the Questionable Enable and Questionable Event registers to cause the following actions When bit in the Questionable NTR register is set to 1 then a 1 to 0 transition of the corresponding bit in the Questionable Condition register causes that bit in the Questionable Event register to be set When a bit of the Questionable PTR register is set to 1 then a O to 1 transition of the corresponding bit in the Questionable Condition register causes that bit in the Questionable Event register to be set e If the same bits in both NTR and PTR registers are set to 1 then any transition of that bit at the Questionable Condition register sets the corresponding bit in the Questionable Event register e If the same bits in both NTR and PTR registers are set to 0 then no transition of that bit at the Questionable Condition register can set the corresponding bit in the Questionable Event register Note Setting a bit in the value of the PTR or NTR filter can of itself generate positive or negative events in the corresponding Questionable Event regis
99. e Rt GE metet 57 Agilent 82335A Driver Considerations essent 57 National Instruments GPIB Driver Considerations 57 BASIC Consider tions eee n ee ER FR e D ERI TRO 57 Language Dictionary Introduction oer PE PRO HERRERA PUDE PAPAE 61 Parameter cM CEP 61 Related Commands tes erede te ee ioter 61 Order of Presentation cise n eere pere entrer eere lobe wep esurire 61 Common Commands 5 re To tru RR RUE PH REED ERU 61 Subsystem Commands eodein Her te e eee esee iere ebur ve 61 Description of Common Commands sese nnen nennen eren 62 CES n Nee edat 62 n 62 ESR coi E 63 ss ide ehe leo eie bue edet iiu t teet tes 63 baies eee Bios Ai REPRISES 64 CDI ie deinen eie 64 uui X 64 E 65 MERGES xeu RU ne AIR S E o uomen eee 65 RS T 66 ge eU gat mte unte tote Ge vie Dk 66 BAC rAd eee RANG Baii tenen Rte olen RANE BAM IAs Seam ES 67
100. e eu nee o o de uec 24 Backspace KEY wise Eum E 24 Output Checkouts hott Pn e te Ho rte n nates sees ated E 24 Checking the Voltage tinet t te bete eee ei RUE 24 Checking the Current F nctilon neuen ge toI ieee 25 Checking the Save and Recall Functions enne 27 Determining GPIB Addie ss sedeo Rel eh ek Be GP RV be E epe es 27 Case of Troubles sss eio RR DUE cesses DU I ERE ORE e 27 IETA maa I c H 27 Error Messagesc 27 Selftest oS heen ee ut ds 27 Power On Error Messages eei yes op EE IR EET eR snes rE ET ED HE ee chia 27 Checks iim Errors 26 e eet son eR teuren 28 Runtime Error Messages eme bs ert cote persi a 28 User Connections Rear Panel Connectlotis eec ro ree eer emer PUE tg pere be Re Sere dye voce EN oret et IE beste 29 Ware Selection RU ER HH MI 29 Analog Connector ttp EORR ERE RO UH DERE DER Perte QUE ea ceases 29 Digital Connector zoe eoo icti e tetti eU bee ote EET dU RE ERU 30 I oad Connections anc da Facete e tacitae at rede cete tacito aiii dide 30 Output Isolation 4 iier b cies See ie died eee ees Behe hae aed 30 Capacitive Loads E eremo DO Pre RC HIERRO
101. e for general safety information Before installation or operation check the Agilent SAS and review this guide for safety warnings and instructions Safety warnings for specific procedures are located at appropriate places in the guide Options and Accessories Table 1 1 Options Option Description 100 Input power 100 Vac nominal 220 _Input power 220 Vac nominal 240 _Input power 240 Vac nominal for 230 Vac operation see table A 2 in appendix A Rack mount kit Agilent 5062 3977 Support rails E3663A are required Rack mount kit Agilent 5062 3977 amp 5062 3974 Support rails E3663A are required 909 Rack mount kit with handles Agilent 5062 3983 Support rails E3663A are required 0B3 Service manual Table 1 2 Accessories Accessory Description Agilent No GPIB cable all models 0 5 meters 1 6 ft 10833D 1 0 meter 3 3 ft 10833A 2 0 meters 6 6 ft 10833B 4 0 meters 13 2 ft 10833C Serial link cable all models 2 0 meters 6 6 ft 5080 2148 Slide mount kit 1494 0059 General Information 13 Operator Replaceable Parts Table 1 3 Operator Replaceable Parts Description Agilent Part No Description _ Agilent Part No Cover dc output 0360 2191 Plug analog connector 1252 3698 Foot cabinet 5041 8801 Plug digital connector 1252 1488 Fuse power Screw output bus bar 0515 1085 100 Vac line voltage 15 A 2110 0054 Screw terminal cover 0515 1085 120 V
102. e of sufficient size to carry the maximum rated current of the supply see Table 4 1 in Chapter 4 2 Connect a DVM across the resistor 3 Turn on the Agilent SAS and program the output for 5 volts and 0 amperes 5 Enable the output Output or send OUTPut ON Value within Low Current limits see Table B 4 for either Agilent E4350B or Agilent E4351B 6 Observe the voltage reading of the voltmeter Divide this by the resistance of the current monitor resistor Record the result as the Low Current value Ipym in Table B 4 7 Record the front panel display readback in Table B 4 Value within specified readback limits see Table B 4 for either Agilent E4350B or Agilent E4351B 8 Program output current to full scale either 8 A or 4A 9 Repeat Steps 6 and 7 Both current readings within specified High Current and readback limits see Table B 4 for either Agilent E4350B or Agilent E4351B 4 Disable the output 10 Disable the output 11 Remove the short from across the load Table B 4 Operation Verification Test Parameters Test Description Minimum Spec Results Maximum Measurement Spec Uncertainty MODEL Agilent E4350B Voltage Programming and Readback Low Voltage 0 V 10 mV mV 10 mV 2 0 uV Front Panel Display Readback 42 mV mV 42 mV 2 0 uV High Voltage 60 V 59 945 V V 60 055 V 845 uV Front Panel Display
103. e this the peak power tracker sweeps around the peak power point The Agilent SAS can be used in this application in either Simulator mode or in Table mode Note that the ability of the Agilent SAS to track the I V curve depends on both the excursion from the peak power point and the modulation frequency The following graph depicts the Agilent SAS peak power tracking error for both models The load is sinusoidally swept from 5 10 or 15 on one side of Pmp to 5 10 or 15 on the other side of Pmp As the frequency of the sweep is increased the tracking error will increase as indicated by the graph 102 Specifications and Application Information Agilent Agilent At 15 of Peak Power Voc E4350B E4351B 9 Imp 60V 120V Isc 7 5 3 75A At 10 of Peak Power Pmp 8A 4A 6 gt 450W 450W Power Error ___ as a Percent of 450W Pmp of Peak Power 0 100 200 300 400 500 600 700 800 900 1000 V I Sweep Frequency in Hertz Figure A 1 Percent Power Error in Simulator Mode Exponential Model Equations The following equations describe the solar array simulator exponential model using the parameters Rs N and a which are defined as functions of the four input parameters Voc Vmp In 2 22 Rsisc N Vimpl 1 As imp isc He ses Imp imp rro E du dh 2 Voc ara 1 Voc Note that these equations tend to be
104. ed in Table 8 3 Table 8 3 Status Questionable Commands Register Command Query Cleared By Condition None STAT QUES COND Cannot be cleared PTR Filter STAT QUES PTR lt NRf gt STAT QUES PTR Programming 0 NTR Filter STAT QUES NTR lt NRf gt STAT QUES NTR Programming 0 or STAT PRES Event None STAT QUES EVEN Reading or CLS Enable STAT QUES ENAB lt NRf gt STAT QUES ENAB Programming 0 Standard Event Status Group Register Functions This group consists of an Event register and an Enable register that are programmed by common commands The Standard Event Status Event register latches events relating to interface communication status see Figure 8 1 It is a read only register that is cleared when read Read query ESR Cleared by CLS ESR The Standard Event Status Enable register functions similarly to the enable registers of the Operation and Questionable status groups The outputs of the Standard Event Status Group are logically ORed into the RSB summary bit 5 of the Status Byte register Register Commands The common ESE command programs specific bits in the Standard Event Status Enable register Because the Agilent SAS implements PSC the register is cleared at power on if PSC 1 ESR reads the Standard Event Status Event register and reading the register clears it Programmed by lt NRf gt Read query ESE Cleared by ESE 0 STATUS BYTE REGISTER This register summarizes the in
105. een changed you can restore it as directed under Turn on Conditions later in this chapter RST results in the following operating conditions Zero voltage output Minimal current output Output disabled Dis annunciator on Overvoltage protection set to its maximum value Overcurrent protection off OCP annunciator off Hardware overcurrent protection set to its maximum value Protection circuits cleared Prot annunciator off Programming Voltage To program the output for 45 volts proceed as follows Press Voltage The display will change from meter mode to indicate VOLTS m Press 4 5 Enter If you discover a mistake before pressing Enter erase the incorrect value with the backspace key The display will return to the meter mode and indicate 00 00 volts Press to enable the output Dis annunciator turns off The VOLTS display will indicate 45 0 volts Note The Agilent SAS must be programmed for a minimal current in order to increase the output voltage beyond zero If the Agilent SAS does not respond or the CC annunciator turns on go to Programming Current and set the current to a small value Now raise the voltage by pressing Voltage Note that the voltage increases by a specific increment depending on the voltage programming resolution each time you press the key and increases rapidly as you hold down the key To lower the voltage press Voltage W Try raising and lowering the vol
106. er On Register States Register Condition Caused By Operation PTR Questionable PTR All bits 1 STAT PRE Operation NTR Questionable NTR All bits 0 STAT PRE Operation Event Questionable Event All bits 0 CLS Operation Enable Questionable Enable All bits 0 STAT PRE Standard Event Status Enable All bits 0 ESE 0 Status Byte All bits 0 CLS Status Request Enable All bits 0 SRE 0 Output Queue Cleared CLS If PSC 1 If PSC 0 the last previous state before turn on is recalled The value of PSC is stored in nonvolatile memory 90 Status Reporting The PON Power On Bit The PON bit in the Standard Event register is set whenever the Agilent SAS is turned on The most common use for PON is to generate an SRQ at power on following an unexpected loss of power To do this bit 7 of the Standard Event Enable register must be set so that a power on event registers in the ESB Standard Event Summary Bit Also bit 5 of the Service Request Enable register must be set to permit an SRQ to be generated The commands to accomplish these two conditions are ESE 128 SRE 32 If PSC is programmed to 0 the contents of the Standard Event Enable and Service Request Enable registers are saved in nonvolatile memory and recalled at power on This allows a PON event to generate SRQ at power on Programming PSC to 1 prevents these registers from being saved and they are cleared at power on This prevents a PON event from gene
107. ere Press AMPS 1 000 Dis annunciator turns off CC annunciator turns on and AMPS display shows the programmed current The output voltage should be close to zero volts Press several times Current decreases several milliamperes each time you press the key Press Current the same Current increases several milliamperes each time you press the number of times key Rotate the Current control first Control operates similarly to the and keys counterclockwise and then The control is rate sensitive Turning it more quickly causes a clockwise more rapid change in current Press OCP You have enabled the overcurrent protection circuit The circuit then tripped because of the output short The CC annunciator turns off and the OCP and Prot annunciators come on The output current is near zero Note that the overcurrent protection circuit is disabled in Simulator and in Table modes Press AMPS 0 000 Dis annunciator turns on Press You have disabled the overcurrent protection circuit The OCP annunciator turns off Press Prot Clear You have cleared the overcurrent protection circuit The Prot Shift annunciator turns off Press Output on off AMPS 1 000 Turn off the Agilent SAS and remove the short from the output terminals Shift is the unlabeled blue key 26 Turn On Checkout Checking The Save And Recall Functions The Save and Recall functions are applicable to the Agilent SAS in Fixed mode only Note that in Simulator or in Table
108. ers RST Value Examples Query Syntax Returned Parameters Related Commands 84 Language Dictionary continuously initiates the output trigger system Eliminates the use of INIT for each trigger turns off continuous triggering In this state the output trigger system must be initiated prior to each trigger using the INIT command INITiate CONTinuous lt bool gt OILIOFFION OFF 1 INITIATE CONTINUOUS 1 INIT CONT NRI 011 ABOR GET RST TRIG TRIG When the trigger subsystem is enabled TRIG generates a trigger signal The trigger will then 1 Initiate a pending level change as specified by CURR LEV TRIG or VOLT LEV TRIG 2 Clear the WTG bit in the Status Operation Condition register 3 If INIT CONT has been given the trigger subsystem is immediately re enabled for subsequent triggers As soon as it is cleared the WTG bit is again set to 1 Command Syntax Parameters Examples Related Commands TRIG SOUR TRIGger IMMediate None TRIG TRIGGER IMMEDIATE ABOR CURR TRIG INIT TRG VOLT TRIG This command selects the trigger source Since the Agilent SAS has no other trigger source than the GPIB bus this command need not be used It is included in the command set to provide programming compatibility with other instruments such as the Agilent Electronic Load family that may have more than one trigger source Command Syntax Parameters RST Value Examples Query Syntax
109. erstellerbescheinigung 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 27779 Type Test Printing History The edition and current revision of this manual are indicated below Reprints of this manual containing minor corrections and updates may have the same printing date Revised editions are identified by a new printing date A revised edition incorporates all new or corrected material since the previous printing date Changes to the manual occurring between revisions are covered by change sheets shipped with the manual In some cases the changes apply to specific instruments Instructions provided on the change sheet will indicate if a particular change applies only to certain instruments Copyright 1997 Agilent Technologies Company Edition 1 December 1997 Updated March 2000 Sept 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 Company T
110. ery Indicator eR UR RS pale Re ue RI IRE Rte 52 Message Unit Separator ceni ett cte tt eei Tr CIR REDE REED Rhein 52 i ipee eet RI e DU EE RE etenim U Eee 52 Message Terminator ss sie REB Oe IA HAIR Ee Eres 52 SCPI Data Formats Sti ten nies ages eis Re ei in ities emen EGUDPIEPIS 53 Numerical 53 Sutfixes and Mult pers uscite detiene electi tie de etie eee tee due eed 53 Character Data E EE OEE 53 teu gets ge dime pA PU e oO Se een EIE 54 Programming Voltage and Current esee nennen trennen retener ener tenerent 54 Programming Protection Circuits is ipeo e e cs um 54 Programming Units in Auto Parallel eese ene ener nenne trennen 54 Changing Outputs by Trigger eee a n i e n ere e aE E A i 55 saving and Recalling States o nde epe nhe DUI n Dine re PUR Te ES TRECE GRO 55 Wians tothe Display deii eae nott i die ei i e e e d eres 56 Programming Status gt Sates RUD Deere ERR Ee e RE pe e SEU Ue 56 Programming the Digital 2 0044 404040 5 8 tren nennen eene 56 System Considerations te re tr RE EES E EES pee 56 Assigning GPIB Address in Programs 3 5 neret eti
111. ess range of 96 to 126 The Agilent SAS expects a message termination on EOI or line feed so set EOI w last byte of Write It is also recommended that you set Disable Auto Serial Polling All function calls return the status word BSTA 96 which contains a bit ERR that is set if the call results an error When ERR is set an appropriate code is placed in variable JBERR Be sure to check JBSTA 96 after every function call If it is not equal to zero branch to an error handler that reads IBERR to extract the specific error If there is no error handling code in your program undetected errors can cause unpredictable results BASIC Considerations The Agilent BASIC Programming Language provides access to GPIB functions at the operating system level This makes it unnecessary to have the header files required in front of DOS applications programs Also you do not have to be concerned about controller hangups as long as your program includes a timeout statement Because the Agilent SAS can be programmed to generate SRQ on errors your program can use an SRQ service routine for decoding detected errors The detectable errors are listed in appendix D Remote Programming 57 SAMPLE PROGRAM FOR Agilent SAS USING THE AGILENT BASIC PROGRAMMING LANGUAGE 10 RE 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 270 280 290 300 310 320 330 340 350 360 370 380 390
112. essen tte beste eere is ee eerte ce uet 111 Calibration over the GPIB eaa pea ee ARI e RU A a eee hts 111 Calibration Example Dieser eae ae 111 Calibration Language Dictionary tette tirer ren ce gor 112 CURR qe G 112 CAT C URR EEV iioi EUR Oe UE bU E puteis ere ien 112 CALI PASS ISO DAP nO Reges GU eR 112 te e PORRPE EROR OU Pr D RR DU Pe eres 112 e een adn Mendes tendat eR 113 CAT VOLT nessuna Re Bese Lotte e es e ER etes ec Qe ird 113 CAL VOLDT EEN eR tet baie eie aea be nte m 113 CAL VOLT PROT neon o RH TO e ERR OD 113 Agilent Basic Calibration Program eene nennen eene nenne tnnt retener entren 114 Digital Port Functions Digital Connector eoo eae eed n OO DER D erre EHE etre P o rer bere ans Et 117 Fault Inhi bit Operation oet eon seen RE ener 117 Changing the Port Configuration nennen nennen rennen enne tenete 119 Digital T O Operation oe eire De ep He REG RECIPI 119 Error Messages Hardware Error Messages eet preteen pere eee ENSE AREE PUR ere Eee ERI 121 Calibration Error Messages sic tette ipeo reg e EEE EE eibi eR Eni E ES ENE Es Gei 121 5ystem Error MeSSages i aee D oss eR pgs ied pite EDU det 121 Index inse
113. f the Operation Status group are logically ORed into the OPER ation summary bit 7 of the Status Byte register Register Commands Commands that access this group are derived from the STAT OPER commands described in chapter 7 Language Dictionary and summarized in Table 8 1 Table 8 1 Status Operation Commands Register Command Query Cleared By Condition None STAT OPER COND Cannot be cleared PTR Filter STAT OPER PTR lt NRf gt STAT OPER PTR Programming 0 NTR Filter STAT OPER NTR lt NRf gt STAT OPER NTR Programming 0 or STAT PRES Event None STAT OPER EVEN Reading or CLS Enable STAT OPER ENAB lt NRf gt STAT OPER ENAB Programming 0 Status Reporting 87 Table 8 2 Bit Configurations of Status Registers Sig nal Meaning Signal Meaning Operation Status Group Standard Event Status Group 0 CAL The interface is computing new 0 OPC Operation complete calibration constants 5 WTG The interface is waiting for a trigger 2 QYE Query error 8 The power module is in constant 3 DDE Device dependent error voltage mode 10 CC The power module is in constant 4 EXE Execution error current mode 5 CME Command error 7 PON Power on Questionable Status Group Status Byte and Service Request Enable Registers 0 OV The power module overvoltage 3 QUES Questionable status summary bit protection circuit ha
114. f the command parameter then the above registers are cleared at power turn on If the command parameter 0 then the above registers are not cleared at power turn on but are programmed to their last state prior to power turn on This is the most common application for PSC and enables the power module to generate an SRQ Service Request at power on CAUTION PSC writes to nonvolatile memory If PSC is programmed to 0 then the ESE and SRE commands also write to nonvolatile memory The nonvolatile memory has a finite maximum number of write cycles see Supplemental Characteristics in appendix A Programs that repeatedly write to nonvolatile memory can eventually exceed the maximum number of write cycles and may cause the memory to fail Command Syntax PSC lt bool gt Parameters 011I OFFI ON Example PSC 0 PSC 1 Query Syntax PSC Returned Parameters lt NRI gt 011 Related Commands ESE SRE RCL Meaning and Type Recall Device State Recalling a previously stored state may place hazardous voltage at the Agilent SAS output Description This command restores the Agilent SAS to a state that was previously stored in memory with a SAV command to the specified location The following states are recalled CURR LEV IMM DIG DATA VAL VOLT LEV IMM CURR PROT STAT OUTP STAT VOLT PROT LEV CURR PROT LEV OUTP PROT DEL Sending RCL also does the following Forces ABORt command before resetting any parameters
115. figured see Figure C 4 to provide a digital input output to be used with custom digital interface circuits or relay circuits Some examples are shown Figure C 5 See Figure C 1 for the pin assignments of the mating plug and appendix A for the electrical characteristics of the port See DIG DATA VAL in chapter 7 Language Dictionary for information on programming the port The digital port pins are as follows Digital Port Functions 119 OUT 0 pin 1 OUT 1 pin 2 IN OUT 2 pin 3 Common pin 4 This port can only be used as an open collector output It is assigned a bit weight of 1 This port can only be used as an open collector output It is assigned a bit weight of 2 This port can be programmed to be either an input or an open collector output with an internal 4 6 k pull up to 5 V This pin is the common connection for the Digital I O ports Ports 0 1 2 Digital Input Port 2 Digital Output External pull up to 5 V required for pins 1 amp 2 A Digital Interface Circuits 16 5 V Max ADO 1 1234 C Coil Current 0 25 Relay Driver Ports 0 1 2 Se Supply contains TTL AS internal clamp diodes CMOS HC for inductive flyback IS oS B Relay Circuits Figure C 5 Digital I O Port Applications 120 Digital Port
116. formation from all other status groups as defined in the IEEE 488 2 Standard Digital Interface for Programmable Instrumentation standard The bit configuration is shown in Figure 8 1 and Table 8 2 The register can be read either by a serial poll or by STB Both methods return the same data except for bit 6 Sending STB returns MSS in bit 6 while polling the register returns RQS in bit 6 Status Reporting 89 The RQS Bit Whenever the Agilent SAS requests service it sets the SRQ interrupt line true and latches RQS into bit 6 of the Status Byte register When the controller services the interrupt RQS is cleared inside the register and returned in bit position 6 of the response The remaining bits of the Status Byte register are not disturbed The MSS Bit This is a real time unlatched summary of all Status Byte register bits that are enabled by the Service Request Enable register MSS is set whenever the Agilent SAS has at least one reason and possibly more for requesting service Sending STB reads the MSS in bit position 6 of the response No bits of the Status Byte register are cleared by reading it Determining the Cause of a Service Interrupt You can determine the reason for an SRQ by the following actions Use a serial poll or the STB query to determine which summary bits are active Read the corresponding Event register for each summary bit to determine which events caused the summary bit to be set When an Event registe
117. g calibration constants overwrites the existing ones in nonvolatile memory If you are not absolutely sure you want to permanently store the new constants omit this step The Agilent SAS calibration will then remain unchanged To replace any existing calibration constants with ones you have just entered press Cal Save CAL SAVED then appears on the display Disabling the Calibration Mode To disable the calibration mode press Cal Disable The display will return to meter mode with the Cal annunciator off Changing the Calibration Password The factory default password is the model number of your supply such as 4350 You can change the calibration password only when the Agilent SAS is in the calibration mode which requires you to enter the existing password Proceed as follows 1 Press Pass 2 Enter the new password from the keypad You can use up to 6 integers and an optional decimal point If you want to operate without requiring any password change the password to 0 zero 3 AGAIN will appear on the display Enter the password a second time 4 When OK is displayed the new password has been accepted Table B 5 Typical Front Panel Calibration Procedure Display Response Enabling the Calibration Mode Begin calibration by pressing Cal Enable PASWD Enter calibration password from Entry keypad If password is correct the Cal annunciator will come on If password is incorrect an error occurs PASSWD
118. ge to drop to zero and the Prot annunciator to go on W There now is no Agilent SAS output due to an overvoltage condition W To verify this press and observe that the display indicates OV This shows that the protection circuit tripped due to an overvoltage condition Front Panel Operation 45 Clearing The OVP Condition With the OVP tripped return to the meter mode and try to clear the condition by pressing Nothing will appear to happen because the OV trip voltage is still below the programmed output voltage Thus as soon as the circuit is cleared it trips again You can clear the OV condition by m Lowering the output voltage below 48 the OV setting or By raising the OV trip voltage above the output voltage setting Try either of these methods Now when you press Prot Clear the Prot annunciator will turn off and the output voltage will return to normal Programming Overcurrent Protection When enabled overcurrent protection removes the Agilent SAS output whenever it goes into CC operation This prevents the unit from indefinitely supplying the full programmed current to the load Note This constant current OCP feature is only available in Fixed mode In Simulator and Tables modes a hardware current limit protection circuit turns the unit off when a programmable current limit is reached This current limit is only programmable over the GPIB using SOUR CURR PROT Setting The OCP Protection To activate overcurren
119. gnated by Agilent Customer shall prepay shipping charges by and shall pay all duty and taxes for products returned to Agilent for warranty service Except for products returned to Customer from another country Agilent shall pay for return of products to Customer Warranty services outside the country of initial purchase are included in Agilent s product price only if Customer pays Agilent international prices defined as destination local currency price or U S or Geneva Export price If Agilent 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 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 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 SHALL NOT BE LIABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES WHETHER BASED ON CONTRACT TORT OR ANY OTHER LEGAL THEORY ASSISTANCE
120. gulated Note See chapter 8 for more information about these registers STAT QUES This query returns the value of the Questionable Event register The Event register is a read only register which holds latches all events that are passed by the Questionable NTR and or PTR filter Reading the Questionable Event register clears it Query Syntax STATus QUEStionable EVENt Parameters None Returned Parameters lt gt Register Value Examples STAT QUES STATUS QUESTIONABLE EVENT Related Commands CLS STAT QUES ENAB STAT QUES NTR STAT QUES PTR STAT QUES COND This query returns the value of the Questionable Condition register That is a read only register which holds the real time unlatched questionable status of the Agilent SAS Query Syntax STATus QUEStionable CONDition Parameters None Examples STAT QUES COND STATUS QUESTIONABLE CONDITION Returned Parameters lt NRI gt Register value Related Commands None STAT QUES ENAB This command and its query set and read the value of the Questionable Enable register This register is a mask for enabling specific bits from the Questionable Event register to set the questionable summary bit QUES of the Status Byte register This bit bit 3 is the logical OR of all the Questionable Event register bits that are enabled by the Questionable Status Enable register Command Syntax STATus QUEStionable ENABle lt NRf gt Parameters 0 to 32767 Suffix None Default Valu
121. he PROT annunciator on the front panel display turns on when the OCP condition occurs When reading the protection message in the front panel display the reading will be OC Clear the OCP condition by pressing Prot Clear on the front panel or by sending an OUTPut PROTection CLEar command over the GPIB Note that you can program an OUTPut PROTection DELay time to prevent nuisance tripping of the OCP circuit when it is enabled Hardware Overcurrent Circuit OC The Agilent SAS has a hardware overcurrent circuit OC that protects the unit if the output current exceeds a preset value Although active in all operating modes this circuit is primarily provided for the Simulator and Table modes since both of these modes disable the constant current OCP function When tripped the OC circuit shuts off the output and fires the internal SCR in approximately 50 to 100 microseconds Note The OC circuit limit can only be programmed over the GPIB using the CURRent PROTection command You cannot set the OC limit from the front panel and you cannot program a delay time for this circuit When an overcurrent condition occurs in Simulator and Table modes the PROT annunciator on the front panel display will turn on The protect message reading on the front panel display will be OV OC To return the Agilent SAS to normal operation first remove the cause of the overcurrent Then either press Prot Clear on the front panel or send an OUTPut PROTection CLEar command ove
122. he information contained in this document is subject to change without notice 4 DECLARATION OF NFORMITY Agilent Technologies pee to ISO IEC i 45014 Manufacturer s Name and Address Responsible Party Alternate Manufacturing Site Agilent Technologies Inc Agilent Technologies 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 Output 500 Watt System dc Power Supplies b Single Output 500 Watt Manually Controlled dc Power Supplies c Single Output 500 Watt System Solar Array Simulator Model Numbers 6651A 6652A 6653A 6654A 6655A b 6551A 6552A 6553A 6554A 6555A c E4350B E4351B 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 00 074 based on Technical Construction File HPNJ1 dated Oct 27 1997 Assessed by Celestica Ltd Appointed Competent Body Westfields House West Avenue Kidsgrove Stoke on Trent
123. he input summary bits are cleared when the appropriate event registers are read see Chapter 4 Status Reporting for more information The MAV bit is cleared at power on or by CLS A serial poll also returns the value of the Status Byte register except that bit 6 returns a Request for Service RQS instead of a Master Status Summary MSS A serial poll clears RQS but not MSS When MSS is set it indicates that the Agilent SAS has one or more reasons for requesting service Language Dictionary 67 Bit Configuration of Status Byte Register Bit Position 7 6 5 3 2 1 0 Condition OPER Mss ESB oues ROS 15895 MERLO ui ESB Event status byte summary MAV Message available MSS Master status summary OPER Operation status summary QUES Questionable status summary RQS Request for service Also represents RQS These bits are always zero Bit Weight 128 64 32 16 STB lt 1 gt Query Syntax Returned Parameters Register binary value TRG Meaning and Type Trigger Device Trigger Description This command generates a trigger when the trigger subsystem has BUS selected as its source The command has the same effect as the Group Execute Trigger lt GET gt command Command Syntax TRG Parameters None Query Syntax None Related Commands ABOR CURR TRIG INIT TRIG VOLT TRIG GET TST Mean
124. he open circuit voltage in simulator mode Sets the maximum power voltage in simulator mode Sets the offset voltage when the operating mode is Table Returns the value of the event register Returns the value of the condition register Enables specific bits in the Event register Sets the Negative transition filter Sets the Positive transition filter Presets all enable and transition registers to power on Returns the value of the event register Returns the value of the condition register Enables specific bits in the Event register Sets the Negative transition filter Sets the Positive transition filter Returns the error number and error string Returns the SCPI version number Triggers the measurement immediately Sets the trigger source BUS Table 7 3 list the programming parameters for each of the models in Fixed mode 70 Language Dictionary Table 7 3 Agilent SAS Programming Parameters in Fixed Mode Parameter Agilent E4350B Agilent E4351B CURR LEV MAX and 8 16 A 4 08 A CURR LEV TRIG 8 16 A 4 08 A CURR PROT LEV MAX 10 5 Programming range is 0 to RST Current Value 0 096 A 0 048 A RST Current Protect Value MAX for both models OUTP PROT DEL 0 to 32 767 s MAX both models RST Value 200 ms both models VOLT LEV MAX and 61 50 V 123 0 V VOLT LEV TRIG MAX 61 50 V 123 0 V Programming range is 0 to MAX RST Voltage Value 0 V for both models VOLT PROT
125. ich bits from the Status Byte Register see STB for its bit configuration are allowed to set the Master Status Summary MSS bit and the Request for Service RQS summary bit A in any Service Request Enable Register bit position enables the corresponding Status Byte Register bit and all such enabled bits then are logically ORed to cause Bit 6 of the Status Byte Register to be set See Chapter 4 Status Reporting for more details concerning this process When the controller conducts a serial poll in response to SRQ the RQS bit is cleared but the MSS bit is not When SRE is cleared by programming it with 0 the Agilent SAS cannot generate an SRQ to the controller If PSC is programmed to 0 the SRE register bits are stored in nonvolatile memory The nonvolatile memory has a finite maximum number of write cycles see Supplemental Characteristics in appendix A Programs that repeatedly write to nonvolatile memory can eventually exceed the maximum number of write cycles and may cause the memory to fail Command Syntax SRE lt NRf gt Parameters 0 to 255 Default Value See PSC Example SRE 20 Query Syntax SRE Returned Parameters lt NRI gt Register binary value Related Commands STB Meaning and Type Status Byte Device Status Description ESE ESR PSC This query reads the Status Byte register which contains the status summary bits and the Output Queue MAV bit Reading the Status Byte register does not clear it T
126. ide the load connection terminals Connect the DVM directly to these current monitoring terminals SET TO REMOTE 1 CV Test Setup 2 CC Test Setup current monitor resistor Figure B 1 Verification and Calibration Test Setup Verification and Calibration 105 Verification General Measurement Techniques Figure B 1 shows the setup for the tests Be certain to use load leads of sufficient wire gauge to carry the output current see Table 4 1 To avoid noise pickup use coaxial cable or shielded pairs for the test leads Programming the Agilent SAS Table 7 3 in chapter 7 list the programming voltage and current ranges for each model Enter the appropriate values from the front panel The programming procedures assume you know how to operate the Agilent SAS from the front panel see chapter 5 Front Panel Operation Order of Tests Perform the following tests for operation verification Test 1 must be done first followed by Tests 2 and 3 in any order 1 Turn on Checkout 2 Voltage Programming and Readback Accuracy 3 Current Programming and Readback Accuracy Turn on Checkout Perform the Turn on Checkout as directed in chapter 3 Turn on Checkout Note The Agilent SAS must pass turn on selftest before you can proceed with these tests Voltage Programming and Readback Accuracy This test verifies that the voltage programming GPIB readback and front panel display functions are within specifications Figure B 1 shows the setup f
127. ilent SAS address is 5 and calibration password is 4350 If required change these parameters in the appropriate statements 10 Agilent BASIC Calibration Program 20 30 DIM Resp 255 Err_msg 255 40 50 Volt cal Voltage DAC calibration 60 Err_found 0 70 PRINT TABXY 5 10 CONNECT INSTRUMENTS AS SHOWN IN FIG A 1 1 Then Press Continue 80 PAUSE 90 CLEAR SCREEN 100 110 Assign Agilent SAS GPIB address 120 130 ASSIGN Ps TO 705 140 150 Initialize Agilent SAS 160 170 OUTPUT Ps RST OUTPUT ON 180 190 Password is optional only required if set to non zero value 200 Default password is the four digit model number 210 220 LINE 240 PASSWORD MUST BE EDITED FOR MODEL OTHER THAN E4350 230 240 OUTPUT Ps CAL STATE ON 4350 250 1 260 OUTPUT Ps CAL VOLTAGE LEVEL MIN 270 INPUT ENTER VOLTAGE MEASUREMENT FROM EXTERNAL VOLTMETER Volt_read 280 OUTPUT Ps CAL VOLTAGE Volt read 290 OUTPUT Ps CAL VOLTAGE LEVEL MAX 300 INPUT ENTER VOLTAGE MEASUREMENT FROM EXTERNAL VOLTMETER Volt_read 310 OUTPUT Ps CAL VOLTAGE Volt_read 320 330 Calibrate overvoltage protection circuit 340 350 OUTPUT Ps CAL VOLTAGE PROTECTION 360 370 GOSUB Save cal 380 IF found THEN 390 INPUT ERRORS have occurred REPEAT VOLTAGE CALIBRATION Y OR N Resp 400 IF TRIM UPC Resp 1 1 2 Y THEN GOTO Volt cal
128. imum Level This minimizes the chance that the slave OVP circuits will trip Then program the OVP level of the master unit to the desired protection level below the maximum level specified in table 7 3 2 Insert Protection Diodes If you connect all supplies to the load through a series diode see Figure 4 9 and a unit s crowbar SCR trips it will not draw current from other supplies Be certain to increase the programmed voltage level of the slaves by at least 0 7 V to compensate for the voltage drop in the diode 36 User Connections 3 Remove or disable the Agilent SAS OVP crowbar SCR For further information contact an Agilent Service Engineer through your local Agilent Sales and Support Office MASTER CV MODE SLAVE 1 CC MODE SLAVE 2 CC MODE 4 MAX qo ter en vec 1 Figure 4 9 Using Series Diodes with Auto Parallel Operation Connecting Supplies in Series Only connect units in series that have identical voltage and current ratings Floating voltages must not exceed 240 Vdc No output terminal may be more than 240V from chassis ground When operating in Simulator mode units must be programmed with identical curves When operating in Table mode units must be programmed with identical table data Figure 4 10 shows how Agilent SAS units can be connected in series for higher voltage output Series connections are straightforward in this case Program each Agilent SAS indepe
129. ing and Type Test Device Test Description This query causes the Agilent SAS to do a self test and report any errors see Selftest Error Messages in Chapter 3 Turn On Checkout TST NRI Query Syntax Returned Parameters 0 Indicates Agilent SAS passed self test Nonzero indicates an error code WAI Meaning and Type Wait to Continue Device Status Description This command instructs the Agilent SAS not to process any further commands until all pending operations are completed Pending operations are as defined under the OPC command WAI can be aborted only by sending the Agilent SAS a GPIB DCL Device Clear command Command Syntax Parameters Query Syntax Related Commands 68 Language Dictionary WAI None None OPC OPC Description Of Subsystem Commands Table 7 2 is a tree diagram of the subsystem commands Commands followed by a question mark take only the query form Except as noted in the syntax descriptions all other commands take both the command and query form The commands are listed in alphabetical order and the commands within each subsystem are grouped alphabetically under the subsystem This summary lists all Agilent SAS subsystem commands in alphabetical order followed by all common commands in alphabetical order See Table 7 3 for the command parameters accepted by each Agilent SAS model ABORt CALibrate DISPlay WINDow STATe lt bool gt MODE mode TEXT DAT
130. ional LEVel header in this example see Moving Among Subsystems for more information VOLT LEV 55 PROT 60 Program the voltage and overvoltage protection CURR LEV 3 PROT STAT ON Program the current and overcurrent protection VOLT LEV PROT CURR LEV PROT STAT Read back the programmed values Programming Units in Auto Parallel CAUTION Refer to Auto Parallel Programming Cautions in chapter 4 before using Agilent SAS units in auto parallel mode The following examples illustrate how to program a master unit and a slave unit that are connected in auto parallel mode The master unit is at address 705 the slave unit is at address 706 Refer to chapter 4 for connection information Refer to chapter 7 for details about specific programming commands The first example illustrates auto parallel operation in Simulator mode 1000 2 Units in auto parallel Simulator Mode 1010 OUTPUT 705 RST Resets the master unit 1020 OUTPUT 706 RST Resets the slave unit 1030 OUTPUT 705 CURR SAS ISC 4 IMP 3 VOLT SAS VOC 60 VMP 40 Program curve data for master unit 1040 OUTPUT 706 CURR SAS ISC 0 IMP 0 VOLT SAS VOC 60 VMP 40 Program curve data for slave unit 1050 OUTPUT 705 CURR MODE SAS Selects simulator mode for master unit 1060 OUTPUT 706 CURR MODE SAS Selects simulator mode for slave unit 1070 OUTPUT 705 OUTP STAT ON Enables the output for master unit 1080 OUTPUT 706 OUTP STAT ON Enables the output for slave uni
131. isters Status Operation Registers Bit Configuration of Operation Registers Bit Position 15 12 11 10 9 8 7 6 5 4 30 993 0 Bit Name NU NU CC NU CV NU NU WTG NU NU NU NU CAL Bit Weight 2048 1024 512 256 128 64 32 16 8 4 2 1 CAL Interface is computing new calibration constants CC The power module is in constant current mode CV The power module is in constant voltage mode NU Not used WTG Interface is waiting for a trigger STAT OPER This query returns the value of the Operation Event register The Event register is a read only register which holds latches all events that are passed by the Operation NTR and or PTR filter Reading the Operation Event register clears it Query Syntax STATus OPERtion EVENt Parameters None Returned Parameters lt NRI gt Register Value Examples STAT OPER STATUS OPERATIOBAL EVENT Related Commands CLS STAT OPER NTR STAT OPER PTR STAT OPER COND This query returns the value of the Operation Condition register That is a read only register which holds the real time unlatched operational status of the Agilent SAS Query Syntax STATus OPERation CONDition Parameters None Examples STAT OPER COND STATUS OPERATION CONDITION Returned Parameters NR1 Register value Related Commands None 80 Language Dictionary STAT OPER ENAB This command and its query set and read the value of the Operational Enable register This register is a mask for enabling specific bits f
132. ive table Query Syntax MEMory TABLe CURRent MAGnitude POINts MEMory TABLe VOLTage MA Gnitude POINts Returned Parameters NRI number of points Examples MEM TABL CURR POIN MEM TABL VOLT POIN Related Commands MEM TABL VOLT MEM TABL CURR MEM TABL CAT This command returns the names of all user defined table Query Syntax MEMory TABLe CATalog Returned Parameters lt STR gt all table names separated by commas Examples MEM TABL CAT Table1 Table2 Table3 end of list Output Subsystem Output commands control the Agilent SAS s voltage and current outputs and an optional output relay Source commands program the actual voltage current and protection functions OUTP This command enables or disables the Agilent SAS output The state of a disabled output is a condition of zero output voltage and a model dependent minimum source current see Table 7 3 The query form returns the output state Command Syntax OUTPut STATe bool Parameters 01 OFFI1ION RST Value 0 Examples OUTP1 OUTPUT STATE ON Query Syntax OUTPut STATe Returned Parameters NR1 Related Commands RST RCL SAV OUTP PROT CLE This command clears any OV overvoltage OC overcurrent OT overtemperature or RI remote inhibit protection features After this command the output is restored to the state it was in before the protection feature occurred Command Syntax OUTPut PROTection CLEar Parameters
133. k on the Start button and select Programs Vxipnp Agxxxx Help 32 bit where Agxxxx is the instrument driver 22 Installation Turn On Checkout Introduction Successful tests in this chapter provide a high degree of confidence that the Agilent SAS is operating properly For verification tests see appendix B under Verification Do not apply ac power to the Agilent SAS until told to do so Note This chapter provides a preliminary introduction to the Agilent SAS front panel See chapter 5 Front Panel Operation for more details During this procedure the Agilent SAS is operating in Fixed mode Preliminary Checkout 1 Make certain that the front panel switch is off 2 Examine the Line Fuse Rating label on the rear panel a Verify that the line voltage rating agrees with your ac line If it does not see chapter 2 under AC Line Voltage Conversion b Use a screwdriver to remove the line fuse from the fuseholder Verify that the fuse is as specified on the label Replace the fuse 3 Check that the SENSE switch is set to Local 4 Make sure that there is no load connected to the output terminals or bus bars Power On Checkout 1 Connect the power cord to the unit 2 Turn the front panel power switch to ON 1 3 The Agilent SAS undergoes a self test when you turn it on If the test is normal the following sequence appears on the LCD a a brief star burst pattern which lights all the LCDs followed by
134. lace of separator 104 Data type error e g numeric or string expected got block date 105 GET not allowed GET inside a program message 108 Parameter not allowed too many parameters 109 Missing parameter too few parameters 112 Program mnemonic too long maximum 12 characters 113 Undefined header syntactical correct but not defined for this device 121 Invalid character in number e g alpha in decimal data 123 Exponent too large numeric overflow exponent magnitude gt 32000 124 Too many digits number too long more than 255 digits received 128 Numeric data not allowed numeric data not accepted where positioned 131 Invalid suffix unrecognized suffix or suffix not appropriate 138 Suffix not allowed numeric element does not allow suffixes Error Messages 121 Table D 1 Summary of System Error Messages continued Error Error String Description Explanation Examples Number 141 Invalid character data bad character or unrecognized 144 Character data too long maximum length is 12 characters 148 Character data not allowed character data not accepted where positioned 150 String data error generic string error 151 Invalid string data e g END received before close quote 158 S String data not allowed string data not accepted where positioned 160 Block data error generic data block error
135. le selected 104 Table in use 105 Too many tables 106 Empty table 107 Table has points exceeding maximum output power 122 Error Messages A lt AARD gt 53 63 64 air clearance 20 air fan 23 analog port characteristics 29 connector configuration 29 signals 29 programming 29 annunciators 42 Addr 23 42 CC 32 42 CV 24 42 Cal 42 109 Dis 23 27 42 Err 18 42 OCP 26 42 47 Prot 25 27 42 46 Rmt 42 Shift 25 42 SRQ 42 Unr 42 48 autoparallel cautions 36 connections 35 36 examples 54 55 operation 36 B blank display 27 C CAL bit see status bit calibration 108 password 109 procedure 108 disabling 109 enabling 109 equipment required 106 jumper 110 111 over GPIB 111 program for 114 SCPI commands for 111 setup 105 shunt resistor 105 calibrating current 110 OVP 110 voltage 109 capacitive load 30 CC mode 36 43 46 47 56 110 checkout 23 output current 25 Index output voltage 23 power on 23 preliminary 23 common commands CLS 62 63 67 80 82 87 89 90 ESE 56 62 63 64 65 67 89 90 91 ESR 56 62 63 89 IDN 50 62 63 OPC 62 63 64 68 92 OPC 62 64 68 92 PSC 62 63 65 66 67 89 91 RCL 27 51 55 62 65 66 67 74 75 78 79 84 RST 15 24 27 43 44 47 50 54 55 62 65 66 67 71 72 84 90 SAV 47 55 62 65 66 67 74 75 78 79 SRE 50 56 62 65 67 90 91 92 STB 62 63
136. mand Corresponding SCPI Command CAL STAT ONI1 lt password gt CAL STAT OFFI0 CAL VOLT PROT CAL CURR LEV MINIMAX CAL CURR DATA lt NRf gt CAL PASS lt NRf gt CAL SAVE CAL VOLT LEV MINIMAX CAL VOLT DATA lt NRf gt Calibration Example A sample calibration program is given at the end of this appendix If your system is Agilent BASIC you can use the program with very little modification Otherwise use it as a guide for writing your own program Verification and Calibration 111 Calibration Language Dictionary The calibration commands are listed in alphabetical order The format for each command follows that shown in chapter 7 Language Dictionary Calibration error messages that can occur during GPIB calibration are shown in Table B 6 CAL CURR This command is used to calibrate the output current The command enters current value that you obtain from an external meter If you are entering the current value allow time for the DVM to stabilize You must first select a calibration level CAL CURR LEV for the value being entered Two successive values one for each end of the calibration range must be selected and entered The Agilent SAS then computes new current calibration constants These constants are not stored in nonvolatile memory until saved with the CAL SAVE command Command Syntax CALibrate CURRent DATA lt NRf gt Parameters See applicable Output Ratings specific
137. mand after the cause of the condition is removed Command Syntax Parameters RST Value Examples Query Syntax Returned Parameters Related Commands 76 Language Dictionary SOURce CURRent PROTection STATe lt bool gt 0111OFFION OFF CURR PROT STAT 0 CURRENT PROTECTION STATE OFF CURR PROT STAT 1 CURRENT PROTECTION STATE ON SOURce CURRent PROTection STATe NRI JOorl OUTP PROT CLE OUTP PROT DEL RST SOUR CURR SAS ISC This command sets the short circuit current for the Simulator mode If you are programming a slave unit that is paralleled to a master unit you must set Isc and Imp to zero 0 This configures the unit to act as a slave Command Syntax Parameter for ISC RST Value Examples Query Syntax Returned Parameters SOUR CURR SAS IMP SOURce CURRent SASimulator ISC lt NRf gt 0 to 8A for Agilent E4350B 0 configures the unit as a slave 0 to 4A for Agilent E4351B 0 configures the unit as a slave Imax CURR SAS ISC 5 CURR SAS ISC 5 IMP 4 VOLT SAS VOC 60 VMP 50 CURR SAS ISC 0 IMP 0 VOLT SAS VOC 60 VMP 50 auto paralleled slave CURR SAS ISC NRI This command sets the current at the peak power point of the Simulator mode If you are programming a slave unit that is paralleled to a master unit you must set Imp and Isc to zero 0 This configures the unit to act as a slave Command Syntax Parameter for IMP RST Value Examples Query Syntax Returned Parameters SOUR
138. mmand Library 2 IBM PC controller with National Instruments GPIB PCII Interface Handler 3 Agilent controller with Agilent BASIC Language System The example program at the end of this chapter is intended to show how some of the same Agilent SAS functions can be programmed for the Agilent BASIC interface 56 Remote Programming Assigning the GPIB Address In Programs The Agilent SAS address cannot be set remotely it must be set from the front panel Once the address is set you can assign it inside programs Refer to chapter 5 under Setting the GPIB Address for more information The following example assumes that the GPIB select code is 7 the primary address is 6 and that the Agilent SAS address will be assigned to the variable PS 1000 Stand alone address The unit will respond if it is set to 6 1010 5 706 Statement for Agilent 823354 Interface 1010 ASSIGN PS TO 706 Statement for Agilent BASIC Interface 1020 Direct address The unit will respond if it is set to 6 or 6 0 1030 5 70600 Statement for Agilent 823354 Interface 1030 ASSIGN PS TO 70600 Statement for Agilent BASIC Interface 1040 Linked address 1 The unit responds if it is set to address 1 and is serially connected to a unit at direct address 6 0 1050 PS 706 01 Agilent 823354 Interface 1090 ASSIGN PS TO 706 01 Agilent BASIC Interface For systems using the National Instruments DOS driver the address is specified in the software configurati
139. modes the Save function is ignored the recall will return the unit to the Fixed mode and reset the parameters to the RST values refer to the discussion of RCL in chapter 7 The Agilent SAS has five nonvolatile memory storage locations 0 through 4 Proceed as follows Make certain that the output is on Dis annunciator is off Set the voltage output to 5 by pressing 5 Enter Save this value to location 1 by pressing Save 1 Enter Return the output voltage to 0 by pressing Recall 0 This step is based on the fact that a newly shipped Agilent SAS has the RST parameters stored in location 0 see chapter 5 Front Panel Operation for more information m Press Recall 1 and notice that the output voltage returns to the value stored in location 1 Determining The GPIB Address When the Agilent SAS is turned on the display shows ADDR n where n is the Agilent SAS GPIB address Any time you want to see the address press Address The display will indicate ADDR 5 which is the factory default If the address has been changed then a different number will appear see Setting the GPIB Address in chapter 5 In Case Of Trouble Line Fuse If your unit appears dead with a blank display and the fan not running first check your ac line to be certain that voltage is being supplied to the Agilent SAS If the power source is normal the Agilent SAS line fuse may be defective If the unit has a defective fuse replace it only onc
140. most accurate for curves that are somewhat rectangular Figure A 2 indicates the potential range of Pmp error percent due to the modeling equation The x axis parameter is Voc V mp Isc Imp which is a measure of the rectangularity of the simulator curve with values near 1 being highly rectangular The y axis is a measure of the possible error of the curve algorithm equation at the peak power point as defined by the following equation Equation pmp For example a curve with the reference settings described in figure 1 gives an x axis value of 1 16 with an equation accuracy for Pmp that is better than 1 1 10096 Equation 96 Pmp Error 15 14 12 13 14 15 Measure of Rectangularity Voc Vmp Isc Imp Figure A 2 Range of Pmp Error Due to Modeling Equation The exponential model is described in the paper Britton Lunscher and Tanju A 9 KW High Performance Solar Array Simulator Proceedings of the European Space Power Conference August 1993 ESA WPP 054 August 1993 The potential error between the equation s actual peak power and the expected peak power Vmp Imp will increase as the curves become less rectangular Specifications and Application Information 103 Series Switching Regulation In this application regulation across the load can be achieved by controlling the duty cycle of a series FET which can be operated at frequencies as high as 50kHz A proprietary non dissip
141. n OUT OF RANGE error will be indicated Simulator Mode Simulator mode uses an exponential model to approximate the I V curve see Figure 1 2 It is programmed in terms of its open circuit voltage Voc short circuit current Isc voltage point Vmp and current point Imp at approximately the peak power point see page A 9 in appendix A for model equations Simulator mode operation is achieved by sampling the output voltage applying a low pass filter and continually adjusting the constant current loop by using the filtered voltage as an index into the exponential model General Information 15 E4351B 4A MAXIMUM CURRENT 480W MAX E4350B 8A TYPICAL CURVE MAXIMUM VOLTAGE _ min E4351B Figure 1 2 Simulator Mode Characteristic POINTS UNDER l 550 min E4350B DASHED LINE N ARE INVALID f ete 0 Ymp 120V 130V 4351 60V 65V E4350B Note that under certain conditions such as if Imp is significantly less than Isc the model equation will exhibit a certain degree of inaccuracy in that the actual maximum power point Pmp and value may be somewhat different from the expected value of Pmp Imp x Vmp Thus the actual Pmp point may not occur at exactly the Imp x Vmp This can be corrected by entering new values for Imp and Vmp see Figure A 1 in appendix A Also note that the accuracy specifications in simulator mode are relative to the val
142. n on conditions as programmed However you may change them if you wish To do this proceed as follows 1 Set up the Agilent SAS to the state you want when it is turned on 2 Store that state to location 0 Front Panel Operation 47 3 Turn off the Agilent SAS 4 Hold in the key and turn the Agilent SAS back on The display indicates RCL 0 PWR ON to verify that the Agilent SAS has configured its turn on state to that stored in location 0 5 From now on the unit will always turn on to the state defined in location 0 Whenever you wish you can return the Agilent SAS to the original factory reset state To do this simply hold down the key when you turn on the unit The display indicates RST POWER ON to verify that the Agilent SAS has configured its turn on state to the original reset state From now on it will continue to turn on in that state Setting The GPIB Address Types of GPIB Addresses Figure 4 11 in chapter 4 shows the ways the Agilent SAS can be connected to the GPIB bus You can set up the GPIB address in one of three ways 1 As a stand alone unit the only unit at the address It has a primary address in the range of 0 to 30 For example 5 or 7 2 As the direct unit in a serial link It is the only unit connected directly to the GPIB bus The primary address is unique and can be from 0 to 30 It is entered as an integer followed by a decimal separator The secondary address always is 0 which may be added after the
143. ndently In Fixed mode program each unit for 5096 of the total output voltage Set the current limit of each unit to the maximum that the load can handle without damage In Simulator mode the total Voc that will be provided is the sum of the open circuit voltages programmed for each individual unit Each Agilent SAS has a reverse voltage protection diode across its output If a reverse voltage is applied the unit cannot control the current conducted through this diode To avoid damaging the unit never connect it in such a way that a reverse voltage can force it to conduct current in excess of the unit s output current rating G Analog Connector Load Connection Load Fixed mode program each unit for 1 2 the load voltage In SAS e Set switch for local or c Optional remote mode the total Voc is the sum of the individual open circuit voltages of optional remote sensing sense connections each unit Figure 4 10 Series Connection Remote Sensing Optional User Connections 37 Analog Current Control applies in Fixed mode only The setup shown in Figure 4 11 allows an external dc voltage to program the Agilent SAS output current in Fixed mode A voltage applied to the differential current programming input programs the output current Note that depending on the polarity of the external source the external signal is either added to or subtracted from the front panel current setting Output current is internally limited t
144. nding triggered level is unaffected by subsequent VOLT commands and remains in effect until the trigger subsystem receives a trigger or an ABORt command is given If there is no pending VOLT TRIG level then the query form returns the VOLT level In order for VOLT TRIG to be executed the trigger subsystem must be initiated see INITiate Command Syntax Parameters Default Suffix RST Value Examples Query Syntax Returned Parameters Related Commands 78 Language Dictionary SOURce VOLTage LEVel IMMediate AMPLitude lt NRf gt SOURce VOLTage LEVel TRIGgered AMPLitude lt NRf gt Table 7 3 Table 7 3 VOLT 200 MA VOLTAGE LEVEL 200 MA VOLTAGE LEVEL IMMEDIATE AMPLITUDE 2 5 VOLT TRIG 20 VOLTAGE LEVEL TRIGGERED 20 SOURce VOLTage LEVel IMMediate AMPLitude SOURce VOLTage LEVel IMMediate AMPLitude MAX SOURce VOLTage LEVel IMMediate AMPLitude MIN SOURce VOLTage LEVel TRIGgered AMPLitude SOURce VOLTage LEVel TRIGgered AMPLitude SOURce VOLTage LEVel TRIGgered AMPLitude MIN lt NR3 gt VOLT and VOLT TRIG return presently programmed immediate and triggered levels If not triggered level is programmed both returned values are the same VOLT MAX and VOLT MIN return the maximum and minimum programmable immediate voltage levels VOLT TRIG MAX and VOLT TRIG MIN return the maximum and minimum programmable triggered voltage levels For VOLT SAV RCL
145. ng current Note that the current increases by a specific increment depending on the current programming resolution each time you press the key and increases rapidly as you hold down the key To decrease the current press Current W Try increasing and decreasing the current by rotating the Current knob clockwise and counterclockwise Note how the output responds as compared to using the Entry keys Disable the output by pressing Gn O The Dis annunciator will turn on Now try to program a current greater than the Imax for your unit Note that the display shows OUT OF RANGE Programming Overvoltage Protection Overvoltage protection guards the load against voltages that reach a specified value above the programmed output voltage Setting the OVP Level Assuming that you have programmed the Agilent SAS for 45 volts you can set the OVP level to 48 volts as follows W Press ov The display will change from meter mode to indicate OV followed by the present OVP value Press Enter The display will return to the meter mode and indicate the output voltage 45 00 volts Press again The display will now indicate OV 48 00 Press to return to the meter mode Checking OVP Operation Assuming the above operating conditions voltage programmed to 45 V and OVP programmed to 48 V trip the OVP circuit as follows Gradually increase the output voltage by pressing until the OVP circuit trips This will cause the output volta
146. ng current JN Caution risk of electric shock Both direct and alternating current Caution hot surface Three phase alternating current HA Caution refer to accompanying documents Earth ground terminal In position of a bi stable push control Protective earth ground terminal O0 Out position of a bi stable push control Lo poe Terminal for Neutral conductor on Off unit permanently installed equipment Terminal is at earth potential Standby unit Used for measurement and control Units with this symbol are not completely circuits designed to be operated disconnected from ac mains when this switch is with one terminal at earth off To completely disconnect the unit from ac potential mains either disconnect the power cord or have a qualified electrician install an external switch The WARNING sign denotes a hazard The CAUTION sign denotes a hazard It calls i CAUTION j It calls attention to a procedure attention to an operating procedure or the like practice or the like which if not which if not correctly performed or adhered to could correctly performed or adhered to result in damage to or destruction of part or all of the could result in personal injury Do not product Do not proceed beyond a CAUTION sign proceed beyond a WARNING sign until the indicated conditions are fully understood until the indicated conditions are fully and met understood and met Acoustic Noise Information H
147. nput first open the connection between pins 3 and 4 Then clear the protection circuit either from the front panel see chapter 5 or over the GPIB see chapter 8 Digital Port Functions 117 Switch Normally Open INH Common es Figure C 2 Example of Inhibit Input In Figure C 3A the FLT output is connected to a relay driver circuit that energizes a relay whenever a fault condition occurs in the power supply The relay can be used to physically disconnect the output of the power supply from the load The FLT output is generated by the logical ORing of the power supply s Operation Questionable and Event status summary bits see chapter 8 You can cause one or more events to activate the FLT output by enabling the appropriate events in these status registers The fault condition is cleared by first removing the cause of the fault and then reading the appropriate status event register s In Figure C 3B the FLT output of one supply is connected to the INH input of another supply Although only two supplies are shown it is possible to chain other supplies with this arrangement A fault condition in any one of the power supplies will disable all of them without intervention either by the controller or external circuitry The controller can be made aware of the fault via a service request SRQ generated by the Questionable Status summary bit see chapter 8 B Exaraple with Multiple Suppiles Figure C 3 Examples of FLT Outputs 11
148. o a maximum of 11246 of the output current rating If you want to fully control the output current through the analog input you must first set the front panel current control to zero A voltage of 0 to 4 volts programs the output current from zero amperes to the rated output current For proper operation the maximum common mode voltage between either the IP or IP inputs and the OUT terminal should be kept to less than 18 volts Note also that the input impedance of the analog input is 20 kO If the output impedance of your programming source is not negligible compared to 20 the programmed current will be less than expected Wiring Considerations Be careful of capacitive coupling from the programming inputs to other lines wired to the analog connector Such coupling can cause output oscillations and noise You can minimize coupling by bundling the IP and IP lines and keeping them separated from other wires Twisting these lines together is also recommended p esip ms Analog connector 0 to 4 volt voltage source programs from 0 to the 240 VDC MAX rated output current 3 Figure 4 11 Analog Current Programming Connections Controller Connections Figure 4 12 shows two basic ways of connecting your Agilent SAS to a controller They are linked and stand alone configurations Stand Alone Connections See Figure 4 12A Each stand alone Agilent SAS has its own GPIB bus address Stand al
149. ode RP 15 Simulator eee eei eee eee tiene ee i REA tet ee etes 15 Table Mode inre d Re E ERU ORE Qe EHE EEUU et em etre 17 Installation Inspection canoe oA Pto RA AN Ier b e ade iiem ah MMA Aue MER 19 Damages SD he bae teet dit biked ete m hes tet ia keeper 19 Packaging Material te pheenhe unen eet D RP UT EUROPE MO IURE RE 19 It ms Supplied iie eto Ier e ei i Rer po perte seite ele ee e eres 19 Location and Temper ture eti rg eet ede sane pepe ree Xue 19 Bench Operations ssc pede a HUNE RU a Ee ee ORE dedi 19 Rack Mounting er RE RU RO RO DERE DER PR e e ie E US ETE 20 Temperature Performance 5 eR UI Un Eq ERE e eite DR nt 20 Tane Connection iiis co e eet ete ee eei eee eti t qu Ad BANS 20 AC Voltage Conversion nx epe eig beide p en epe ee eh ete ips 21 VXI plug amp play Power Products Instrument Drivers eese nennen rennen 21 Downloading and Installing the Driver 22 Accessing Online ee eee ettet etie eoe oe Ub PER EU retia ete pen 22 Turn on Checkout Introduction aio ee ER DO RE rA studet E EO E Un 23 Preliminary Checkout utor t e re edic tecti tei PRIA ie np ee ieee 23 Power on Checko t reete nn Eee ee GOs eA ee bep 23 Using the Keypad bee te aep peo e DOR OT rtr D ORE pP 24 Shifted aset eie ete e e etie ae hid
150. on of solar arrays In this mode a table of I V points often provided by the solar array manufacturer specifies the curve The Agilent SAS provides up to 60 tables with a total of 33 500 I V points of storage and a maximum of 4 000 I V points per table The tables I V curves are easily stored and recalled A portion of table storage is allocated in non volatile memory with 30 possible tables totaling 3 500 points These are retained when power is turned off In table mode current and voltage offsets can be applied to the selected table to simulate a change in the operating conditions of the solar array Key Features 480 Watt output Auto parallel capability for higher power Very low output capacitance Switching recovery time in less than 5 microseconds Programmable overvoltage and over current protection which are independent of other circuits Overtemperature protection Fan speed control to minimize acoustic noise Extensive set of programming features Fast I V curve change in both table and simulator modes Up to 60 volatile non volatile tables Self test at power up or from an IEEE 488 2 command Serial link to connect up to 16 outputs to one IEEE 488 2 address Standard Commands for Programmable Instruments SCPI 14 General Information Output Characteristic The Agilent E4350B E4351B Solar Array Simulator can be operated in three modes fixed mode simulator mode and table mode Mode switching on the Agilent SAS is accomplishe
151. on program IBCONFIG EXE and assigned a symbolic name The address then is referenced only by this name within the application program see the National Instruments GP IB documentation Agilent 82335A Driver Considerations For GW BASIC programming the GPIB library is implemented as a series of subroutine calls To access these subroutines your application program must include the header file SETUP BAS which is part of the DOS driver software SETUP BAS starts at program line 5 and can run up to line 999 Your application programs must begin at line 1000 SETUP BAS has built in error checking routines that provide a method to check for GPIB errors during program execution You can use the error trapping code in these routines or write your own code using the same variables as used by SETUP BAS If there is no error handling code in your program undetected errors can cause unpredictable results National Instruments GP IB Driver Considerations Your program must include the National Instruments header file DECL BAS This contains the initialization code for the interface Prior to running any applications programs you must set up the interface with the configuration program IBCONF EXE Your application program will not include the unit s symbolic name and GPIB address These must be specified during configuration when you run IBCONF EXE Note that the primary address range is from 0 to 30 but any secondary address must be specified in the addr
152. one units may be connected to the bus in series configuration star configuration or a combination of the two You may connect from 1 to 15 stand alone units to a controller GPIB interface Linked Connections See Figure 4 12B Up to 16 units may be used at a single GPIB primary bus address by making linked connections W The first Agilent SAS in a linked connection is a direct unit connected to the controller via a GPIB cable The direct unit is the only unit connected directly to the bus and has a unique primary bus address W Theremaining units are linked supplies connected to the direct unit via a serial link cable Each linked unit has a unique secondary GPIB address and derives its primary address from the direct unit You may connect from 1 to 15 linked supplies to each direct unit 38 User Connections Note The Agilent SAS is shipped from the factory with its GPIB address set to 5 The Agilent SAS primary 600090 e por and secondary addresses can be changed from the front panel as described under Changing the GPIB Address in chapter 5 For Agilent SAS GPIB interface capabilities see appendix A DIRECT SUPPLY DIRECT SUPPLY NOTE 1 a Stand Alone Configuration Note 2 LINKED SUPPLY UNKED SUPPLY LINKED SUPPLY DIRECT SUPPLY NOTE 1 b Serial Link Configuration Note 3 d From 1 to 15 direct supplies may be connected to 1 controller GPIB interface Tighten connector thumbscrews by hand Do not use
153. or the tests Measure the dc output voltage directly at the sense connections of the output terminals or bus bars Connect the output as shown Table B 2 Voltage Programming and Readback Accuracy Tests Action Normal Result 1 Turn off the Agilent SAS and connect a DVM across the sense terminals see Figure B 1 1 2 Tum on the Agilent SAS with no load and program the CV annunciator on Output current near 0 output for 0 volts and maximum programmable current 3 Record voltage readings of voltmeter Vpym and front Readings within Low Voltage limits see Table B 4 for panel display readback in Table B 4 either Agilent E4350B or Agilent E4351B 4 Program voltage to full scale either 60 V or 120 V 5 Record voltage readings of voltmeter Vpym and front Readings within High voltage limits see Table B 4 for panel display readback Vrp in Table B 4 either Agilent E4350B or Agilent E4351B 106 Verification and Calibration Current Programming and Readback Accuracy This test verifies that the current programming and readback are within specification Connect the appropriate current monitoring resistor see Table B 1 as shown in Figure B 1 2 The accuracy of the resistor must be as specified in the table Table B 3 Current Programming and Readback Accuracy Test Action Normal Result 1 Turn off the Agilent SAS and connect the current monitoring resistor as shown in Figure B 1 2 Be certain to use wir
154. ormation Table A 2 Supplemental Characteristics for Agilent E4350B E4351B SAS continued Parameter Both Models AC Line Voltage Ratings selectable via internal switching 100 120 220 240 Vac 13 6 96 see Appendix B 230 Vac 10 10 Frequency Range 47 63 Hz Maximum Input Power 1380 VA 1100 W 120 W with no load Maximum AC Line Current Ratings in 100 Vac range in 120 Vac range 12 Arms 15 A fuse 10 Arms 12 A fuse in 220 Vac range 5 7 Arms 7 A fuse in 230 Vac range 5 3 Arms 7 A fuse in 240 Vac range 5 3 Arms 7 A fuse Output Terminal Isolation maximum from chassis ground 240 Vdc Maximum Reverse Diode Current with fan running a continuous reverse diode current equal to the output current rating of the unit Load Lead Drop with Remote Sensing Simulator Table mode up to 2 volts Voc Vmp Fixed mode up to 2 volts total Current Sinking Capability 350 mA 420 mA Simulator Table mode Fixed mode Command Processing Time Average time for output voltage to change after 20 ms receipt of digital data when the unit is connected directly to the GPIB Bus Voltage Programming Rise Fall Time time for output to change from 90 to 10 or lt 8 ms 10 to 90 of its total excursion Voltage Programming Settling Time time for output change to settle within 0 1 of the rating of the unit either 60mV or 120 mV Monotonicity
155. ose nee a sakes Dee nep tats de iR en eR ERROR RT RP 123 Agilent Sales and Support Offices sss 128 11 General Information What s In This Guide This guide describes the Agilent Model E4350B E4351B Solar Array Simulator SAS An overview of the unit is given in this chapter Installation and user connections are discussed in chapters 2 and 4 Programming from the front panel and over the GPIB is discussed in chapters 5 7 If you just need to check that the unit is operating properly read chapter 3 The edition and current revision of this manual are indicated on the title page Reprints of this manual containing minor corrections and updates may have the same printing date Revised editions are identified by a new printing date A revised edition incorporates all new or corrected material since the previous printing date Changes to the manual occurring between revisions are covered by change sheets shipped with the manual In some cases the manual change applies only to specific instruments Instructions provided on the change sheet will indicate if a particular change applies only to certain instruments Safety Considerations The Agilent Solar Array Simulator is a Safety Class 1 instrument which means it has a protective earth terminal That terminal must be connected to earth ground through a power source equipped with a 3 wire ground receptacle Refer to the Safety Summary page at the beginning of this guid
156. ote mode controlled over the GPIB Addr The Agilent SAS is addressed to listen or talk SRQ The Agilent SAS is requesting service from the controller Voltage Rotate clockwise to increase the output voltage or the voltage limit in constant current mode Use to knob rapidly set an approximate output value Applies in Fixed mode only Current Rotate clockwise to increase the output current or current limit in constant current mode Use to rapidly set knob an approximate current value Applies in Fixed mode only When the Agilent SAS is under remote control press to enable local operation This control can be defeated by a lock out command over the GPIB Press to display the Agilent SAS s GPIB address You can change the address with the ENTRY keys Use to display error codes generated during remote operation Select by pressing Address Use to restore a previously saved Agilent SAS state Use ENTRY keys 9 through to specify which location to recall Note Location 0 may contain the Agilent SAS turn on state See Turn on operation in this chapter Use to save the Agilent SAS s present state to nonvolatile memory Select by pressing Recall Use ENTRY keys to specify the location where you want to store the state You may use locations 0 through 4 CO This unlabeled blue key is the Shift key Press to access the shifted alternate key functions 42 Front Panel Operation Table 5 1 Front Panel Control
157. output but does not clear any condition that may have caused OCP to trip Note Under certain conditions the OCP circuit may fail to clear because load demand occurs before the Agilent SAS has time to build up the required output current capacity In such cases disable the output press before clearing the OCP circuit After OCP is cleared then enable the Agilent SAS output 46 Front Panel Operation CV Mode VS CC Mode Once you program a voltage V ser and a current Isgr the Agilent SAS will maintain itself in either CV or CC mode depending on the resistance of the load R1 If the load demands less current than Isgr operation will be in CV mode with the voltage maintained at The output current will be at some value below Isgr as determined by If the current increases beyond Isgr the unit will switch to CC mode by varying its output voltage to maintain a constant current value of Isgr As the load resistance is decreased the voltage decreases to maintain the set current level In other words the output voltage is determined by Isgr Unregulated Operation If the Agilent SAS goes into a mode of operation that is neither CV nor CC the Unr annunciator will light Some unregulated states occur so briefly that they do not turn on the Unr annunciator but they may set the UNR status bit during remote operation see chapter 6 under Programming Status One condition that can cause a noticeable unregula
158. primary address If the secondary address is omitted it is assumed to be 0 For example 5 0 or 7 3 As a linked unit in serial link It gets its primary address from the direct unit It has a unique secondary address that can be from to 15 It is entered as an integer preceded by a decimal separator For example or 12 When you enter a secondary address leading zeros between the decimal separator and the first digit are ignored For example 1 01 and 001 are accepted as secondary address 1 and displayed as 0 01 Zeros following a digit are not ignored Thus 10 and 010 are both accepted as secondary address 10 and displayed as 0 10 Changing the GPIB Address Use the key and numerical keypad for entering addresses The Agilent SAS is shipped with a 5 stand alone address as the default The general procedure for setting an address is Action Display Shows Press Current address Press new address keys New address replaces numbers on the display Press Display returns to meter mode If you try to enter an invalid number ADDR ERROR is displayed The following examples show how to set addresses To set stand along primary address 6 press 6 Enter To set direct unit primary address 6 press 6 Enter To set linked secondary address 1 press 1 Enter To set linked secondary address 12 press 1 2 Enter Note The Agilent SAS display will reset recall the state in location 0 whenever you change between a
159. query causes the interface to place an ASCII 1 in the Output Queue when all pending operations are completed Pending operations are as defined for the OPC command Unlike OPC OPC prevents processing of all subsequent commands OPC is intended to be used at the end of a command line so that the application program can then monitor the bus for data until it receives the 1 from the power module Output Queue CAUTION Do not follow OPC with TRG or GPIB bus triggers Since triggers sent after OPC will not CAUTION execute this will prevent the unit from accepting further commands If this occurs the only programmable way to restore operation is by sending the Agilent SAS a GPIB DCL Device Clear Query Syntax OPC Returned Parameters NRI A lis placed in the Output Queue when the operation is complete Related Commands OPC TRIG WAI OPT Meaning and Type Option Identification Query Description This query identifies any installed options Options are identified by a number 0 indicates no options are installed Query Syntax OPT Returned Parameters lt AARD gt multiple options separated by commas 64 Language Dictionary PSC Meaning and Type Power on Status Clear Device Initialization Description This command controls the automatic clearing at power turn on of the Service Request Enable register and the Standard Event Status Enable register The setting of the PSC command is stored in non volatile memory I
160. r AMPS display may show OL or OL This indicates that either the output voltage or current is beyond the range of the meter readback circuit or that the value that is programmed is out of range Table 3 4 shows other error messages that may appear at runtime Table 3 4 Runtime Errors Display Meaning Display Meaning EE WRITE ERR EEPROM status timeout UART FRAMING UART byte framing error SBUF FULL Message too long for buffer UART OVERRUN Overfilled UART receive buffer SERIAL DOWN Failed communication with UART PARITY UART byte parity error panel front panel STK OVERFLOW Front panel stack overflow 28 Turn On Checkout User Connections Rear Panel Connections Make application load connections to the output terminals or bus bars analog connector and digital connector as shown on the rear panel drawing for your model Agilent SAS Make controller connections GPIB and serial link as shown in Figure 4 12 at the end of this chapter Wire Selection Fire Hazard To satisfy safety requirements load wires must be large enough not to overheat when WARNING carrying the maximum short circuit current of the Agilent SAS If there is more than one load then any pair of load wires must be capable of safely carrying the full rated current of the unit Table 4 1 lists the characteristics of AWG American Wire Gauge copper wire Table 4 1 Wire Characteristics AWG No Ampacity in free
161. r is read it is cleared This also clears the corresponding summary bit The interrupt will recur until the specific condition that caused each event is removed If this is not possible the event may be disabled by programming the corresponding bit of the status group Enable register or NTRIPTR filter A faster way to prevent the interrupt is to disable the service request by programming the appropriate bit of the Service Request Enable register Service Request Enable Register This register is a mask that determines which bits from the Status Byte register will be ORed to generate a service request SRQ The register is programmed with the SRE common command When the register is cleared no service requests can be generated to the controller Output Queue The Output Queue is a first in first out FIFO data register that stores Agilent SAS to controller messages until the controller reads them Whenever the queue holds one or more bytes it sets the MAV bit 4 of the Status Byte register If too many unread error messages are accumulated in the queue a system error message is generated see appendix D The Output Queue is cleared at power on and by CLS Initial Conditions At Power On Status Registers When the Agilent SAS is turned on a sequence of commands initializes the status registers For the factory default RST power on state Table 8 4 shows the register states and corresponding power on commands Table 8 4 Default Pow
162. r the GPIB Operating Configurations Connecting the Load to One Unit Figures 4 4 and 4 5 show how to connect a single Agilent SAS to one load and to multiple loads Lon ve a ILE SENSE 7 ce Load Connection j Load Local G Analog Connector e Set switch for local or optional remote sensing S Connect for remote sensing optional Figure 4 4 Single Load Connection User Connections 33 Q Load Connection Load Analog Connector e Set switch for local or optional remote sensing e Connect for remote sensing optional Er Mss SENSE 3 N 0 0 Remote Em d H 7 Figure 4 5 Multiple Load Connection Remote Sensing Optional Connecting Supplies in Parallel In most cases units can be connected in straight parallel mode as shown in Figure 4 6 without any master slave distinction and without any wiring to the analog connectors This is possible because of the relatively high output impedance of each unit All units that are connected in straight parallel mode must be programmed with identical I V curves or table data Remote sensing may be employed on all units if desired but in many cases will have only a minimal effect on performance due to the high output impedance of each unit If for some reason it is
163. ram maximum output currents unless the shorting wire is capable of handling the current see Supplemental Characteristics in appendix A and table 4 1 The AMPS display will show various readings Ignore the VOLTS display Table 3 2 Checking the Current Functions with Output Terminals Shorted Turn off the Agilent SAS and connect a 18 AWG or larger wire across the output and terminals If you intend to test at full rated output current use a wire or wires of sufficient size to carry the maximum current of the unit see Supplemental Characteristics in appendix A and table 4 1 in Chapter 4 Turn on the unit Meter mode Essentially zero outputs with Dis annunciator on Set the voltage to its maximum value This example assumes that you have an 60 volt unit see Table 7 3 for the value for your specific unit Turn On Checkout 25 Table 3 2 Checking the Current Functions with Output Terminals Shorted continued Dis turns off and CC turns on The output current is restored If you have a shorting wire of sufficient capacity you may continue testing up to the maximum rated current of the Agilent SAS see Performance Specifications in appendix A When finished go to the next step Press AMPS 0 000 Dis turns on and output current drops to zero Action Display Explanation Press 6 0 VOLT 60 000 Program output to 60 volts Press Current 1 AMPS 1 000 Program output to 1 amp
164. ransformer tab pull the wire straight up Moving the wire from side to side can damage the tab 7 Replace the top cover and secure the carrying straps 8 Change the line fuse on the rear panel to the proper value for the new line voltage Power supply top view cover removed Transformer Front Panel NOTE LL Indicates a jumper Figure 2 2 Agilent SAS Line Select Jumpers VXI plug amp play Power Products Instrument Drivers VXI plug amp play Power Products instrument drivers for Microsoft Windows 95 and Windows NT are now available on the Web at http www agilent com find drivers These instrument drivers provide a high level programming interface to your Agilent Power Products instrument VXI plug amp play instrument drivers are an alternative to programming your instrument with SCPI command strings Because the instrument driver s function calls work together on top of the VISA I O library a single instrument driver can be used with multiple application environments Supported Applications System Requirements Agilent VEE The VXI plug amp play Power Products instrument driver Microsoft Visual BASIC complies with the following e Microsoft Visual C C Microsoft Windows 95 e Borland C C Microsoft Windows NT 4 0 National Instruments Lab VIEW HP VISA revision F 01 02 e National Instruments LabWindows CVI National Instruments VISA 1 1 Installation 21 Downloading and Installing the Driver NOTE Before
165. rating SRQ at power on Examples Note These examples are generic SCPI commands See chapter 6 Remote Programming for information about encoding the commands as language strings Servicing an Operation Status Mode Event This example assumes you want a service request generated whenever the Agilent SAS switches to the CC constant current mode From Figure 8 1 note that the required path is for a condition at bit 10 CC of the Operation Status register to set bit 6 RQS of the Status Byte register The required register programming is shown in Table 8 5 Table 8 5 Generating RQS from the CC Event Register Command Comment Operation PTR STAT OPER PTR 1024 Allows a positive transition at the CC input bit 10 to be latched into the Operation Status Event register Operation Enable STAT OPER ENAB 1024 Allows the latched CC event to be summed into the OPER summary bit Service Request Enable SRE 128 Enables the OPER summary bit from the Status Byte register to generate RQS Operation Condition STAT OPER EVEN When you service the request read the event register to determine that bit 10 CC is set and to clear the register for the next event bits of the PTR registers bits are set to 1 at power or in response to STAT PRES Adding More Operation Events To add the CV constant voltage event to this example it is only necessary to add the decimal values for bit 8 value 256 to the programming commands of the
166. receded by an asterisk RST IDN SRE8 W Subsystem commands see table 7 2 perform specific Agilent SAS functions They are organized into an inverted tree structure with the root at the top The following figure shows a portion of a subsystem command tree from which you access the commands located along the various paths Figure 6 1 shows a portion of the subsystem command tree you can see the complete tree in table 7 2 Note the location of the ROOT node at the top of the tree The SCPI interface is at this location when The Agilent SAS is powered on m A device clear DCL is sent to the Agilent SAS m The interface encounters a message terminator m The interface encounters a root specifier ROOT TRIGger iMMediate D SOURce STATus OPERation PRESet CONDition QUEStionable ENABIe ree NTRansition PTRansition Figure 6 1 Partial Command Tree Multiple Commands in a Message Multiple SCPI commands can be combined and sent as a single message with one message terminator There are two important considerations when sending several commands within a single message Use a semicolon to separate commands within a message There is an implied header path that affects how commands are interpreted by the Agilent SAS The header path can be thought of as a string that gets inserted before each command within a message For the first command in a message the header path is a null string For each subseq
167. required that the output currents of all paralleled units be accurately matched then you must use auto parallel connections as described in the following paragraphs eee 206006 7e 262808 j 00 S S S 5 WT D ME NS cun EE a eet eee Lr S 1 Connectors used for optional remote sensing _ Load e Set all units to either local sensing or remote sensing e Optional remote sense connections Figure 4 6 Straight Parallel Connections Remote Sensing Optional 34 User Connections Connecting Supplies in Auto Parallel Auto parallel connections are used only if it is required that the output currents of all paralleled units be accurately matched Otherwise you can use straight parallel connections as described in the previous paragraphs Auto Parallel Wiring in Simulator and Table Modes Figure 4 7 illustrates how units can be connected in auto parallel for increased current output in Simulator and Table modes If remote sensing is required connect the remote sense terminals of all the supplies to the load as shown in Figure 4 7 e eee 1 4P 1 SAS 8 5 SLAVE SLAVE Y MASTER M ee s s 2d 240 voc ux nogues s A mevocua 3 M
168. ring If remote sensing is required connect the remote sense terminals of the master unit to the load as shown in Figure 4 8 To avoid output ringing you can either connect a 2 2 uF or larger capacitor across the load or you can connect a filter across the current monitoring connections as shown in the figure This network consists of two 200 ohm resistors in series with the current monitoring lines going to the master unit and a 68 ohm 0 1uF RC paralleled across and IP terminals User Connections 35 IP V V V 200 D 8 6 Master 0 1uF Slave Y MS S to ye ee mmsSpmss eec Ra 4 PETE lt AY Analog Connectors Master Unit 8 Load Slave Supplies Program only the master Load connection Set the slave output voltage slightly higher Optional components to reduce than the load lead drop to the master to ensure output ringing Select only one of the that the slaves stay in CC mode Also set the two methods shown slave currents to zero e Set this switch for optional remote sensing e Only local sensing permitted Remote sensing connections Figure 4 8 Auto Parallel Connection in Fixed Mode Remote Sensing Optional Auto Parallel Programming in
169. rom the Operation Event register to set the operation summary bit OPER of the Status Byte register This bit bit 7 is the logical OR of all the Operational Event register bits that are enabled by the Status Operation Enable register Command Syntax Parameters Suffix Default Value Examples Query Syntax Returned Parameters Related Commands STAT OPER NTR PTR Commands STATus OPERation ENABle lt NRf gt 0 to 32 767 None 0 STAT OPER ENAB 1312 STAT OPER ENAB 1 STATus OPERation ENABle lt NRI gt Register value STAT OPER EVEN These commands set or read the value of the Operation NTR Negative Transition and PTR Positive Transition registers These registers serve as polarity filters between the Operation Enable and Operation Event registers to cause the following actions When bit in the Operation NTR register is set to 1 then a 1 0 transition of the corresponding bit in the Operation Condition register causes that bit in the Operation Event register to be set When a bit of the Operation PTR register is set to 1 then a 0 to 1 transition of the corresponding bit in the Operation Condition register causes that bit in the Operation Event register to be set If the same bits in both NTR and PTR registers are set to 1 then any transition of that bit at the Operation Condition register sets the corresponding bit in the Operation Event register If the same bits in both NTR and PTR registers are set to 0
170. rs do not count toward the 12 character limit when they are preceded by an alphanumeric character When punctuation characters are included then the maximum number of characters alphanumeric punctuation that can be displayed is 15 If it exceeds the display capacity a message will be truncated to fit and no error message will be generated If any character in the message is not a member of the above character set the character will be displayed as a starburst all 16 segments of the character are lit Note IEEE Standard Digital Interface for Programmable Instrumentation requires that a string be enclosed in either single or double quotes Command Syntax DISPlay WINDow TEXT DATA STR Parameters See LCD character set RST Value S Examples DISP TEXT DEFAULT MODE Query Syntax DISPlay WINDow TEXT Returned Parameters STR Last programmed text string Related Commands DISP DISP MODE RST Measure Subsystem Measurement commands measure the output voltage and current MEAS CURR MEAS VOLT These queries return the voltage and current measured at the Agilent SAS s sense terminals Query Syntax MEASure CURRent DC MEASure VOLTage DC Parameters None Default Suffix A for MEAS CURR V for MEAS VOLT Examples MEAS CURR MEAS VOLT MEASURE VOLTAGE DC MV Returned Parameters lt NR3 gt 72 Language Dictionary Memory Subsystem This subsystem manages the instrument s data table memory MEM
171. s and Indicators continued Function Keys nitt Press to enable or disable the Agilent SAS output This key toggles between the two states The disabled state programs the output to the RST voltage and current settings Note prevent current overshoots do not use the Output On Off key when operating in CC mode Current overshoots may occur when the output turns on because the unit momentarily goes to constant voltage mode before switching back to constant current mode As an alternative program the current to zero instead of using the key Voltage Press to display the output voltage setting After pressing Voltage you may use the ENTRY keys to change the value Applies in Fixed mode only Current Press to display the output current setting After pressing Current you may use the ENTRY keys to change the value Applies in Fixed mode only the value to shut down Response can be OC overcurrent protection OT overtemperature OV OC hardware overcurrent or OV overvoltage If no protection circuit has tripped the display shows dashes Press this key to reset the protection circuit If the condition that caused the circuit to trip has been removed the Prot annunciator will go off Select by pressing 79 3 d d d Press to enable or disable the Fixed mode OCP function This key toggles between the two states which are indicated by the OCP annunciator Applies in Fixed
172. s given here apply to both models The recommended calibration interval is once a year Note that these instructions do not include verification procedures If you need to perform verification as a prerequisite to or as part of your calibration procedure see Verification Test Equipment Required The equipment listed in Table B 1 or equivalent is required for calibration General Procedure Because the Agilent SAS output must be enabled during calibration voltages or currents hazardous to personnel and or damaging to equipment can appear at the output terminals Parameters Calibrated The following parameters may be calibrated e Output voltage Output voltage readback Overvoltage protection OVP Output current Output current readback You do not have to do a complete calibration each time If appropriate you may calibrate only the voltage or current and proceed to Saving the Calibration Constants Figure B 1 shows the test setups required for voltage and current calibration 108 Verification and Calibration Front Panel Calibration Eight shifted keys and the Entry keypad are used for calibration functions see chapter 5 Front Panel Operation for explanations of shifted keys and the Entry keypad The following procedures assume you understand how to operate front panel keys Entering the Calibration Values Follow the steps in Table B 5 for entering calibration values Saving the Calibration Constants CAUTION Storin
173. s tripped 1 oc The power module overcurrent 4 MAV Message Available summary bit protection circuit has tripped 4 OT The power module has an 5 ESB Event Status summary bit overtemperature condition 9 RI The power module remote inhibit state 6 MSS Master Status summary bit is active ROS Request Service bit 10 UNR The power module output is 7 OPER Operation status summary bit unregulated QUESTIONABLE STAT CONDITION PTR NTR EVENT ENABLE Ov N U 5 3 bad 3 RT STANDARD EVENT STATUS CONDITION PIR NTR EVENT ENABLE CAL N U wTG N U N U N U N U EVENT ENABLE jor OPERATION ee STATUS PTR NTR EVENT ENABLE LOGICAL OR SERVICE REQUEST ENABLE STATUS BYTE LOGICAL OR SERVICE REQUEST GENERATION FIG8 1 GAL Figure 8 1 Agilent SAS Status Model 88 Status Reporting Questionable Status Group Register Functions The Questionable Status registers record signals that indicate abnormal operation of the Agilent SAS As shown in Figure 8 1 the group consists of the same type of registers as the Status Operation group The outputs of the Questionable Status group are logically ORed into the QUES tionable summary bit 3 of the Status Byte register Register Commands Programming for this group is derived from the STAT QUES commands described in chapter 7 Language Dictionary and summariz
174. see current monitor N National Instruments DOS driver 57 nonvolatile memory 14 17 65 69 73 76 97 lt NRI gt 53 lt NR2 gt 53 lt NR3 gt 53 lt Nrf gt 53 lt Nrf gt 53 33 43 74 76 OC bit see status bit OCP operation 46 47 OCP 17 25 32 46 47 76 key see front panel keys offsets 18 operating features 14 OPC bit see status bit OPER bit see status bit OT 43 74 82 91 OT bit see status bit OUT OF RANGE 15 44 output characteristic 15 output isolation 30 97 output impedance see impedance output output queue 62 90 OV 25 43 46 OV bit see status bit OV OC 17 overcurrent protection see OCP overlapped commands 64 overvoltage protection see OVP OVP operation 45 46 OVP 25 31 32 35 45 46 75 79 P packaging material 19 parallel commands see overlapped commands parallel operation 34 peak power tracker 102 performance test 105 Pmp 16 103 PON bit see status bit power cord see line cord power on conditions see turn on conditions checkout 23 status 90 power options 13 power receptacle 20 power source 13 20 primary address see GPIB address programming accuracy 95 analog 37 examples 56 parameters 71 pending operations 55 64 68 75 85 92 resolution 96 program message see SCPI command message PSC bit see status bit PWR ON 48 Q query 51 56 61 62 QUES bit see status bit QYE bit see
175. set value An error will be generated if the offset causes the maximum allowed Voc or the power limit to be exceeded Negative Voltage Offsets original curve is offset to the left lt along the positive voltage axis and terminated at the current axis The curve points that are not used because they extended beyond the current axis are not deleted they will be valid once again if the negative voltage offset is reduced or eliminated Positive Current Offsets original curve is offset up 77 along the positive current axis and the last point on the curve will be extended at the same slope that was present in the original table curve at Voc until it intersects the voltage axis at a new slightly higher Voc value The new Isc equals the original Isc plus the offset value An error will be generated if the offset causes the maximum allowed Isc Voc or the power limit to be exceeded Negative Current Offsets original curve is offset down Y along the positive current axis and terminated at the voltage axis at a new lower Voc value The curve points that are not used because they are extended beyond the voltage axis are not deleted they will be valid once again if the negative current offset is reduced or eliminated Front panel operation You can use the front panel when the unit is operating in Table mode To do this press the Local key whenever the front panel RMT annunciator is on Be aware however that any voltage
176. t 54 Remote Programming The following example illustrates auto parallel operation in Table mode 1000 2 Units in auto parallel Table Mode 1010 OUTPUT 705 RST 1020 OUTPUT 706 RST 1030 OUTPUT 705 MEM TABL SEL TABLE1 1040 OUTPUT 705 MEM TABL VOLT 0 5 10 50 55 60 1050 OUTPUT 705 MEM TABL CURR 4 4 3 5 3 2 5 0 1060 OUTPUT 705 CURR TABL NAME TABLE1 1070 OUTPUT 706 MEM TABL SEL TABLE1 1080 OUTPUT 706 MEM TABL VOLT 0 5 10 50 55 60 999 1090 OUTPUT 706 MEM TABL CURR 4 4 3 5 3 2 5 0 999 1060 OUTPUT 706 CURR TABL NAME TABLE1 1100 OUTPUT 705 CURR MODE TABL OUTP STAT ON 1110 OUTPUT 706 CURR MODE TABL OUTP STAT ON Resets the master unit Resets the slave unit Selects a table for entering data for master unit Enter voltage data for master unit Enter current data for master unit Activates the table for master unit Selects a table for entering data for slave unit Enter voltage data for slave unit Enter current data for slave unit Activates the table for slave unit Enables the output for master unit Enables the output for slave unit Changing Outputs by Trigger applies in Fixed mode only If you do not program pending triggered levels they default to the programmed immediate output levels The following statements shows some basic trigger commands OUTP OFF VOLT LEV IMM 55 TRIG 60 CURR LEV IMM 2 5 TRIG 3 VOLT LEV IMM TRIG CURR LEV IMM TRIG OUTP ON MEAS
177. t protection press The OCP annunciator will light and Agilent SAS will continue to operate normally until it is forced into CC operation If that occurs the OCP circuit trips and the Agilent SAS output drops to zero Checking OCP Operation The easiest way to check this operation at any specified current is to increase the load current beyond the programmed current value This will force the Agilent SAS into the CC mode When OCP trips the Prot annunciator will light and the Agilent SAS output will drop to zero There is now no Ahilent SAS output due to an overcurrent condition To verify this press and observe that the display indicates OC Clearing The OCP Condition With the OCP tripped return to the meter mode and try to clear the condition by pressing Prot Clear Nothing will appear to happen because the reason for the condition has not been removed Thus as soon as the circuit is cleared it trips again You can clear the OC condition by W Increasing the load resistance to lower the output current below the programmed current value or By raising the programmed current to a value above that required by the load Clear the fault by either of the above methods Then clear the OCP circuit by pressing Prot Clear The Prot annunciator will go off and the Agilent SAS output will be restored to normal If desired you can also restore the output by disabling the OCP function press to turn off the OCP annunciator This restores the
178. t voltage rating The diode may also require a heat sink Sense Connections Your Agilent SAS was shipped set up for local sensing This means that the unit will sense and regulate its output voltage at the output terminals with the load voltage being somewhat lower due to load lead voltage drop Where load voltage regulation is critical remote sensing may be required Local sensing is obtained by placing the SENSE switch see Figure 4 3 in the Local position button in The Agilent SAS is shipped with the switch in this position Note If the sense terminals are left unconnected with the sense switch in the Remote position the voltage at the output will increase approximately 3 to 5 over the programmed value Since the front panel meter measures the output voltage at the sense terminals the voltage readback will not reflect this increase Remote Voltage Sensing Optional Remote sense connections are illustrated in most of the load diagrams Remote sensing is accomplished by connecting the remote sense terminals of the Agilent SAS directly to the load rather than to the output terminals This allows the unit to automatically compensate for the voltage drop in the load leads as well as to accurately read back the voltage directly across the load In Fixed mode the maximum allowable load lead drop that can be compensated for by remote sensing is 2 V In Simulator and Table mode the maximum allowable voltage drop in the load leads is 2 V
179. t year Query Syntax Parameters Returned Parameters Examples Related Commands SYSTem VERSion none lt NR2 gt SYST VERS SYSTEM VERSION None Trigger Subsystem The commands in this subsystem only apply in Fixed mode This subsystem controls the output triggering of the Agilent SAS Trigger commands control the remote triggering of the Agilent SAS Initiate commands initialize the trigger system ABOR This command cancels any trigger actions presently in process Pending trigger levels are reset equal to their corresponding immediate values ABOR also resets the WTG bit in the Operation Condition Status register see chapter 4 If INIT CONT ON has been programmed the trigger subsystem initiates itself immediately after ABORt thereby setting WTG ABOR is executed at power turn on and upon execution of RCL or RST Command Syntax Parameters Examples Related Commands INIT ABORt None ABOR INIT RST TRIG This command enables the trigger system With triggering enabled a BUS trigger causes the output to change to its triggered level If triggering is not enabled all triggers are ignored Command Syntax Parameters Examples Related Commands INIT CONT INITiate IMMediate For INIT IMM None INITIATE IMMEDIATE ABOR GET RST TRIG TRG This command controls the output trigger system The trigger system can be set as follows 1 or ON 0 or OFF Command Syntax Paramet
180. tage Current Current Derating Factor from 40 C to 55 C Simulator Table mode Fixed mode constant voltage Simulator Table mode Fixed mode constant current Fixed Mode Voltage Current Voltage Current Current Constant voltage Constant current Constant voltage Constant current 16 mV rms 125 mV p p 12 mV rms 95 mV p p 0 075 10mV 0 2 20 mA 0 08 42mV 0 20 28mA 0 35 48mA There is no maximum impedance restriction Therefore Imp can be less than or equal to Isc In Simulator mode the output current is related to the readback output voltage by an internal algorithm In Table mode the output current is related to the readback output voltage by interpolation between points that are entered by the user 0 120 V 0 4 0 05 24 mV rms 195 mV p p 12 mV rms 95 mV p p 0 075 20 mV 0 2 10 mA 0 08 84mV 0 20 14mA 0 35 24mA Specifications and Application Information 95 Table A 2 Supplemental Characteristics for Agilent E4350B E4351B SAS Parameter Agilent E4350B Agilent 4 51 Output Programming Range maximum programmable values Simulator Table Voltage 0 65V 0 130V Fixed mode Voltage 0 61 5V 0 123 V Current 0 8 16 0 4 08A Overvoltage Protection 0 73 V 0 140 V Overcurrent Limit 0 10A 0 5 P Programming Resolution average values Voltage 18 mV 36 mV Current 2 5 m
181. tage by rotating the Voltage control clockwise and then counterclockwise Note how the output responds as compared to using the Entry keys Try to program a voltage greater than the maximum voltage rating for your unit see Supplemental Characteristics in appendix A Note that the display shows OUT OF RANGE 44 Front Panel Operation Programming Current You may program the Agilent SAS current without a load but must have a load in order to draw output current These tests assume you have the load connected in accordance with the information in chapter 4 User Connections and Considerations If you do not have a load on the Agilent SAS you may connect a short across the output terminals as described in chapter 3 Turn on Checkout The example will program a low current You may later increase the output current to the levels you will expect to use To program the output current to 1 3 amperes proceed as follows Disable the output by pressing The Dis annunciator will turn on Program the voltage by pressing 5 9 Enter Press Current The display will change from meter mode to indicate AMPS Press 1 C S Enter If you discover a mistake before pressing erase the incorrect value with the backspace key The display will return to the meter mode and indicate up to 0 000 Press to enable the output Dis will turn off and the display will indicate VOLTS 50 00 AMPS 1 300 Now increase the current by pressi
182. ted error will occur and the unreturned data will be lost Types of SCPI Messages There are two types of SCPI messages program and response A program message consists of one or more properly formatted SCPI commands sent from the controller to the Agilent SAS The message which may be sent at any time requests the Agilent SAS to perform some action Aresponse message consists of data in a specific SCPI format sent from the Agilent SAS to the controller The Agilent SAS sends the message only when commanded by a special program message called a query Remote Programming 51 The following figure illustrates the SCPI message structure Data Message Unit Keywords Query Indicator VOLT LEV 4 5 PROT 4 8 CURR NL Keyword Separator Message Terminator Message Unit Separators Root Specifier FiG 1 GAL Figure 6 2 Command Message Structure The Message Unit The simplest SCPI command is a single message unit consisting of a command header or keyword followed by a message terminator The message unit may include a parameter after the header The parameter can be numeric or a string ABOR lt NL gt VOLT 20 lt NL gt Headers Headers which are sometimes known as keywords are instructions recognized by the programming interface Headers may be either in the long form or the short form Long Form The header is completely spelled out such as VOLTAGE STATUS DELAY Short Form The header has only the first three or four
183. ted state is low ac line voltage Another condition might be operation with a paralleled unit that has a different voltage setting Saving and Recalling Operating States You can save programming time by storing up to five operating states in nonvolatile memory The front panel programming parameters that are saved are Output voltage Output current OVP voltage OCP state on or off Output state enabled or disabled Note More Agilent SAS parameters are saved in remote operation See chapter 7 under SAV As an example set up the following state Voltagge 4 V Current 5 A OVP voltage 4 5 V OCP OCP annunciator on Output off Dis annunciator on Save the above state to location 1 by pressing Save 1 Enter Now set up the following state Voltagge 45 V Current 22 5 A OVP voltage 5 V OCP off OCP annunciator off Output on Dis annunciator off Save the above state to location 2 by pressing 2 Enter Restore the first state by pressing Recall 1 and verify the parameters Restore the second state by pressing Recall 2 Enter Note how the Agilent SAS is automatically programmed each time Turn On Conditions Whenever you first apply power to an Agilent SAS it automatically turns on in a safe reset state in Fixed mode with the following parameters off 0 minimum maximum off Minimum is the RST value specified in Table 7 3 It is recommended that you leave the tur
184. ter Command Syntax STATus QUEStionable NTRansition lt NRf gt STATus QUEStionable PTRansition lt NRf gt Parameters 0 to 32767 Suffix None Default Value 0 Examples STAT QUES NTR 16 STATUS QUESTIONABLE PTR 512 Query Syntax STAT QUES NTR STAT QUES PTR Returned Parameters NR1 Register value Related Commands STAT QUES ENAB System Commands System commands read back system errors and the SCPI version number SYST ERR This query returns the next error number followed by its corresponding error message string from the remote programming error queue The queue is a FIFO first in first out buffer that stores errors as they occur As it is read each error is removed from the queue When all errors have been read the query returns 0 NO ERROR If more errors are accumulated than the queue can hold the last error in the queue will be 350 TOO MANY ERRORS see appendix C for error codes You can use the Agilent SAS front panel key to read errors from the queue Errors generated at the front panel are not put into the queue but appear immediately on the display Query Syntax SYSTem ERRor Parameters None Returned Parameters lt NRI gt lt SRD gt Examples SYST ERR SYSTEM ERROR Related Commands None Language Dictionary 83 SYST VERS This query returns the SCPI version number to which the Agilent SAS complies The returned value is of the form YYYY V where YYYY represents the year and V is the revision number for tha
185. tete ege etre bro ote eite peii Pte Ped eene 79 SOUR VOLT SAS VMP eene pete ignei reete 79 SOUR VOLT TABL OFES nonien thee e pene DRE ipee 80 niri 80 STAT OPER 2 i tUm UU ERE Ede bo stre md 80 STAT OPER COND ide Hed e ee 80 STAT OPER ENAB tno re SR HOT ertet rip o CERO REO HER D EE ERU eR 81 STAT OBER PTR NTR sinet tese oe Recette iler s 81 STAT PRES ncs RUIN est Pau A ees 81 ede PEE Ron eit iss Shae GRECE Cdi 82 STAT QUES CONDDJ ante pne pet e REED ERR DURER Et RD rd 82 STAT QUES ENA Bi eset eo he tetuer i eg atte de ceti eer de tiet etd 82 STAT QUES PT RINT Rossii uio Ute EE ON E EEES Ere EU ROME De e Erbe E ee EE ee 83 System Commands 0 ev otunineqeeennebudee nice ge Oei Ded h 83 5 ep Ere ep eram prede 83 SYST VBRS ener splen put BU Rn Uie denn Gre 84 Trigger Subsystem e eo wes bebe ROSS 84 BBOR ete eee Sal pte RGR ed HU SR EG oe TLS RS Ral pete nt debe mee EA 84 INIT 84 E MH 84 TRIG sabe EUR UE Ed 85 10 Status Reporting Asilent SAS Status Structures SEP EUER 87 Operation Status Group iis dete ma IMBRE 87 Register Functions 2 rrt er E
186. tructures used here and gives an introduction to programming You should also be familiar with chapter 5 Front Panel Operation in order to understand how the Agilent SAS functions The programming examples are simple applications of SCPI commands Since SCPI syntax remains the same for all programming languages the examples are generic Syntax definitions use the long form but only short form headers or keywords appear in the examples If you have any concern that the meaning of a header in your program listing will not be obvious at some later time then use the long form to help make your program self documenting Parameters Most commands require a parameter and all queries will return a parameter The range for a parameter may vary according to the model of Agilent SAS Parameters for all models are listed in Table 7 3 Related Commands Where appropriate related commands or queries are included These are listed either because they are directly related by function or because reading about them will clarify or enhance your understanding of the original command or query Order of Presentation The dictionary is organized as follows IEEE 488 2 common commands in alphabetical order Subsystem commands Common Commands Common commands begin with an and consist of three letters command or three letters and a query Common commands are defined by the IEEE 488 2 standard to perform some common interface functions The
187. ts 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 service personnel Safety Symbol Definitions Direct current L Terminal for Line conductor on permanently installed equipment Alternati
188. ts rated output See applicable Output Ratings in appendix A 110 Verification and Calibration Recovering From Calibration Problems You can encounter serious calibration problems if you cannot determine a calibration password that has been changed or the Agilent SAS is severely out of calibration There are jumpers inside the Agilent SAS that permit the calibration password to be defeated and allow the original factory calibration constants to be restored These jumpers are explained in the Service Manual Calibration Error Messages Error messages that can occur during calibration are shown in Table B 6 Table B 6 GPIB Calibration Error Messages Error Meaning Error Meaning No No 1 CAL jumper prevents calibration 5 Incorrect computed programming constants 2 CAL password is incorrect 6 Wrong CAL command sequence 3 CAL mode is not enabled 7 Incorrect state CV CC for this command 4 Incorrect computed readback constants This is a hardware disable See the Agilent SAS Service Manual Calibration Over The GPIB You can calibrate the Agilent SAS by using SCPI commands within your controller programming statements Be sure you are familiar with calibration from the front panel before you calibrate from a controller The SCPI calibration commands are related to the front panel calibration controls as follows Front Panel Corresponding SCPI Front Panel Command Command Com
189. tus Events esseist ESk Tee Os rennen enn nenne tenete 91 Monitoring Both Phases of a Status 92 SCPI Command Comjpletion eter Irt Ee HEC Er Ure EUER EE 92 DPI Discrete Fault Indicator nnne eea e een E eE 92 RI Remote 93 Using ita etn iren Ghat veel 93 Specifications and Application Information Specifications and Supplemental Characteristics nennen nennen nenne 95 Output Impedance Graphs ices r ido tre ei e etg oer e ost 99 Simulator 5 b ERU het e EE rh dette i eU ERR Duet e e EE uie cn 99 Fixed Modes een Oed UE 101 Peak Power Tracker Application nnne tette tte rhe rp rere heir DE E pco ERR ER 102 Exponential Model Equations 2 EE eU ee RE rb b em ti Ete eee Rete ted 103 Series Switching eene nennen trennen teen nennen entrent entren teen ene 104 Shunt Switching Regulation sese neen eren 104 Verification and Calibration Introduction eee E OREMUS 105 Test Equipment Required eee edet et RO RP
190. uction This appendix includes verification and calibration procedures for the Agilent E4350B and E4351B SAS Instructions are given for performing the procedures either from the front panel or from a controller over the GPIB The verification procedures do not check all the operating parameters but verify that the Agilent SAS is performing properly Performance Tests which check all the specifications of the dc source are given in the applicable Service Manual The required test equipment and acceptable test results are specified in tables in this appendix Note Performance Tests which check all the specifications of the Agilent SAS are given in the Service Manual Test Equipment Required The following equipment is required to perform the tests Table B 1 Equipment Required for Verification and Calibration Equipment Characteristics Recommended Model Digital Voltmeter Resolution 10 nV 1 V Agilent 3458A Readout 8 1 2 digits DC Accuracy 0 00556 6 digits 20 ppm Current Monitor Resistor 15 A 0 1 Q 0 04 25 W Guildline 9230 15 For Calibration Over the GPIB HP Vectra or IBM compatible with GPIB Interface or Agilent BASIC series Current Monitoring Resistor The 4 terminal current monitoring resistor listed in Table B 1 is required to eliminate output current measurement error caused by voltage drops in leads and connections The specified resistors have special current monitoring terminals ins
191. uent command the header path is defined as the characters that make up the headers of the previous command in the message up to and including the last colon separator An example of a message with two commands is CURR LEV 3 PROT STAT OFF which shows the use of the semicolon separating the two commands and also illustrates the header path concept Note that with the second command the leading header CURR was omitted because after the CURR LEV 3 command the header path was became defined as CURR and thus the instrument interpreted the second command as CURR PROT STAT OFF In fact it would have been syntactically incorrect to include the CURR explicitly in the second command since the result after combining it with the header path would be CURR CURR PROT STAT OFF which is incorrect 50 Remote Programming Moving Among Subsystems In order to combine commands from different subsystems you need to be able to restore the active path to the root You do this with the root specifier For example you could clear the output protection and check the status of the Operation Condition register as follows OUTPUT PROTECTION CLEAR STATUS OPERATION CONDITION By using the root specifier you could do the same thing in one message see figure 6 2 OUTPUT PROTECTION CLEAR STATUS OPERATION CONDITION The following message shows how to combine commands from different subsystems as well as within the same subsystem see figure 6
192. ues given in the exponential equations and not necessarily to the input parameters Imp and Vmp However the Isc and Voc values are always accurately given by the exponential equations Restrictions Maximum Power 480 W Voc 130 V E4351B or 65 V E4350B Isc 4 A E4351B or 8 A E4350B Vmp Voc Imp lt Isc AV AI 2 25 for Agilent E4350B gt 1 for Agilent E4351B NOTE When the unit detects invalid equation parameters it will generate an error light the ERR annunciator on the front panel and will not use the new parameters Instead it will operate with the last valid settings Therefore although it may seem that the unit is operating correctly it will NOT be using the values that you have programmed for simulator mode If simulator mode is entered with no parameters specified E4350B E4351B the default values that will be used are Voc 61 5 V 123 V Vmp 492 98 4 V Imp 6 528 A 3 264 A Isc 8 16 A 4 08 A Pmp 321 2 W 321 2 W 16 General Information Front panel operation You can use the front panel when the unit is operating in Simulator mode To do this press the Local key whenever the front panel RMT annunciator is on Be aware however that any voltage and current values that you enter from the front panel will have no effect on the unit while it is in Simulator mode These front panel values will take effect as soon as the unit is placed in Fixed mode Likewise the OCP function only t
193. urrent value that is transferred to the output terminals when a trigger occurs A pending triggered level is unaffected by subsequent CURR commands and remains in effect until the trigger subsystem receives a trigger or an ABORt command is given If there is no pending CURR TRIG level then the query form returns the CURR level In order for CURR TRIG to be executed the trigger subsystem must be initiated see INITiate Command Syntax SOURce CURRent LEVel IMMediate AMPL itude lt NRf gt SOURce CURRent LEVel TRIGgered AMPLitude lt NRf gt Parameters Table 7 3 Default Suffix A RST Value Table 7 3 Examples CURR 200 MA CURRENT LEVEL 200 MA CURR TRIG 20 CURRENT LEVEL TRIGGERED 20 Query Syntax SOURce CURRent LEVel MMediate AMPLitude SOURce CURRent LEVel MMediate AMPLitude MAX SOURce CURRent LEVel IMMediate AMPLitude MIN SOURce CURRent LEVel TRIGgered AMPL itude SOURce CURRent LEVel TRIGgered AMPLitude MAX SOURce CURRent LEVel TRIGgered AMPLitude MIN Returned Parameters lt NR3 gt CURR and CURR TRIG return presently programmed immediate and triggered levels If not triggered level is programmed both returned values are the same CURR MAX and CURR MIN return the maximum and minimum programmable immediate current levels CURR TRIG MAX and CURR TRIG MIN return the maximum and minimum programmable triggered current levels Related Commands For CURR SAV RCL
194. xplicit decimal point Example 273 0273 lt NR3 gt Digits with an explicit decimal point and an exponent Example 2 73E 2 273 0E 2 Listening Formats lt NRf gt Extended format that includes lt NR1 gt lt NR2 gt and lt NR3 gt Examples 273 273 2 73E2 lt NRf gt Expanded decimal format that includes lt NRf gt MIN and MAX Examples 273 273 2 73E2 MAX MIN and MAX are the minimum and maximum limit values that are implicit in the range specification for the parameter lt Bool gt Boolean data Either form 011 or OFF ON may be sent with commands Queries always return a O or 1 Suffixes and Multipliers Some SCPI commands let you send engineering units as suffixes to extend numeric parameters The following table lists the allowable suffixes and multipliers Class Current Amplitude Time Table 2 2 Suffixes and Multipliers Suffix Unit A Ampere V Volt 5 second Common Multiplie 1E3 1E 3 IE 6 U Unit with Multiplier MA milliampere MV millivolt MS millisecond rs kilo milli micro Character Data For query statements character strings may be returned in either of the forms shown in table 2 3 depending on the length of the returned string lt CRD gt lt AARD gt an implied message terminator lt SRD gt Character Response Data Permits the return of character strings Arbitrary ASCII Response Data Permits the return of undelimited 7

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