Agilent Technologies 6628A manual

OPERATING MANUA L MULTIPLE OUTPUT LINEA R SYSTEM DC POWER SUPPLY A GILENT MODELS 6625A, 6626A , 6628A , and 6629A A gilent Part No 0662 6-90001 Micro fiche Part No. 06626 -90002 Printed in M alaysia S e p t e m b e r , 2 0 0 4[...]

2 CERTIFICATION Agilent Technologies certifies that this product met its published specifications at time of s hipment from the factory. Agil ent Technologies further cer tifies that its calibration measurements ar e traceable to the United States N ational Bureau of Standards, to the extent allowed by the Bur eau's calibration facility, and t[...]

3 SAFETY SUMMARY The followi ng gener al safe ty prec autions m ust be observed during all phases of operation , service, and repair of this instrument. F ailure to comp ly with th ese pre cautions or with specific w arnings els ewhere in this manual viol ates safety standards of design, manufacture, and i ntended use of t he instr ument. A gilent [...]

4 SAFETY SUMM A RY (continued) GENERAL Any LEDs us ed in t his prod uct are Cla ss 1 L EDs as per I EC 82 5-1. ENVIRONMENTAL CONDITI ONS This ins trume nt is intended f or indoor use i n an installati on category II, pollution degree 2 e nvironm ent. It is des igned t o operate a t a m aximum relative humidity of 95% and at a ltitudes of up t o 200[...]

5 DECLARATION OF CONFORMITY According to ISO/IEC Guide 22 and CEN/CENELEC EN 45014 Revision: B.00.00 Issue Date: Created on 11/24/2003 3:33 PM Document No. 662xA.11.24.doc Manufacturer’s Name and Address Responsible Party Alternate Manufacturing Site Agilent Technologies, Inc. Agilent Technologies (Malaysia) Sdn. Bhd 550 Clark Drive, Suite 101 Bu[...]

6 WHAT THIS MANUAL CONTAINS It contains infor mation relating to the i nstallation, o peration, and p r ogramming of these supplies as out lined belo w. Maintenan ce and troubl eshooting instruct ions are given i n a separate S ervice Manu al (Agilent Part No. 06626-900 03). Chapter 1.--General Information Chapter 1 contains a g e neral description[...]

7 Table Of Contents 1 General Information Introduction ........................... . ....................................................................................................................... 11 Safety Considerations ................... ....................................................................................................[...]

8 Table Of Contents (co nti nue d) Positive and Negative Voltag es.............. ............................................................................... .................... 51 Remote Voltage Sensing............ ......... .................................................................................... ...................... 51 Remote Se[...]

9 Table Of Contents (co nti nue d) Local Control Of Output Functions.............. ... .............................................................................................. 85 General............... ............................ ........................................................................................................... 85 Se[...]

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General In formatio n 11 1 General Information Introduction This chapter contains a general description of your power supply as well as its performance specifications. Information about options, acces sories, and GP- IB cables is also provided. This m anual describes the Agilent 6625A , 6626A, 6628A , and Agi lent 6629A power su pplies. Unless stat[...]

General Information 12 Accessorie s 10833A GP-IB cable, 1 m (3.3 ft) 10833B G P-IB cable, 2 m (6.6 ft) 10833C GP- IB cable, 4 m (13.2 f t) 10833D GP-IB ca ble, 0.5 m (1.6 ft) 10834A GP- IB connector exten der Slide m ount kit (1494-0059) Description The Agilent po wer supp l y features a combination o f programming capabilitie s and linear po wer s[...]

General In formatio n 13 The power supplies allow up to a 10 v olt sense lead drop. This f eature makes them ideal for test system applications where remote sensin g is used. The output voltage an d current for any output can be moni tored with the front panel di splay. Out put specifi c error messag e s are also displa yed. Front p a ne l an nu nc[...]

General Information 14 Basic Operation Figu re 1-2 is a block di agram that il lust rates th e major ass embl ies con taine d within the power su pply. As shown in the figure, each supply includes a power transf or mer, two or m o re output boards, a GP-IB board, and f ront panel (display and contro l keys) . Figure 1-2. Block Di agram The appropri[...]

General In formatio n 15 Output Boards The outpu t boards are li near dc pow er supplies . Each isol ated outpu t operating boun dary curve is sho wn in Figu re 1-1. The ac input to each ou tput board is rectified an d applied to a regulator circu it. Each output board em plo ys series regulation techniques. A regulator elemen t is connected in ser[...]

General Information 16 Output response time : Beginning at the time the power su pply has finished processing a VSET command (chang e output volta ge), the maxi mum time for the o utp u t voltage to settle to withi n a settli ng band ab o ut the final val ue from any specifi ed operating point. This v alue must be added to th e comm and processing [...]

General In formatio n 17 Table 1-2. Specifications (continued) Source Effect: Voltag e 0.5 mV 0.5 mV 0.5 mV 0.5 mV + Curren t 0.005 mA 0.005 mA 0.01 mA 0.01 m A Programming A ccuracy: Note: The programmi ng accuracy specifi cations may degrade slightly wh en the unit is subjected to an RF f ield equal to or greater than 3 v olts/meter. Voltag e 0.0[...]

General Information 18 Table 1-3. Supplemental Ch aracteristics (continued) Output Power 25 Watt Output 50 Watt Output Output Ra nge Lo Ra nge Hi Range Lo Range Hi Range Output Vol ts 0-7 V 0-50 V 0-16 V 0-50 V Output Am ps 0-15 mA 0-500 mA 0-200 mA 0-2 A Temperature Coeff icient-M easurement: Voltage (0 . 002% + 0 .1 mV) per° C +0.5 m V (0 .002 %[...]

General In formatio n 19 Table 1-3. Supplemental Ch aracteristics (continued) High Line Inrush Cur rent: 100 V Opt 120 V Opt 220 V O pt 240 V Opt Peak Valu e 85 A 85 A 50 A 50 A rms Value 6.3A 5.7 A 3.0 A 3.0 A Fus e Rating 8 A 8 A 4 A 4 A GP-IB Interface Capabilitie s: SH1. A H1, T6, L4, SR1, RL 1, P P1, DC1, DT0, C0, E1 Current Sink Capability: 2[...]

General Information 20 Table 1-3. Supplemental Ch aracteristics (continued) Weight: Agilen t 6625A, 6628A Agilen t 6626A, 6629A Net 15.5 kg (34 lbs.) 17.7 kg (39 lbs.) Shippi ng 20. 8 kg (46 lbs.) 23 kg (51 lbs.) Load Cross Regulation: Voltag e 0.25 mV 0.25 mV 0.25 m V 0.25 mV + Curren t 0.005 mA 0.005 mA 0.01 m A 0.01 mA[...]

General In formatio n 21 Figure 1-4. CV Operation w ith Capacitive Load, Stabilit y Graph for all Outputs[...]

General Information 22 Figure 1-5. Out put Noise (Typical) CC M ode Figure 1-6. Out put Noise (Typical) C V M ode[...]

General In formatio n 23 Figure 1-7. Output Impedance (Typical) G raph (See Supplemental Cha racteristics)[...]

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Installation 25 2 Installation Introduction This chapt er contai ns inst ructions for checkin g and m ounting y o ur power s upply , connecting your s upply to ac po w er, converting it f rom one line voltage to another, and connecting the GP-IB cable. The pow er supply generates operating magneti c fields which may affect th e operation of other i[...]

Installation 26 Figure 2-1. Ou tline Diagram Input Power Requirements You can operate this power supply fro m a nominal 100 V, 120 V, 220 V or 240 V sin gle phase pow er so urce at 47 to 66 Hz. The input voltage rang e, maximum inpu t current, high line inru s h current (PK), and th e fuse required f or each of the nomin al inpu ts are lis ted in T[...]

Installation 27 Figure 2-2. Rear Panel Detail ( Agilent 6626A Show n) Table 2-2 Line Fuses Line Voltage Fuse Needed Agilent Part Number (for ¼ X 1¼ in . fuses only) 100/120 V 8A M 2110-03 42 220/240 V 4A M 2110-00 55 Note: All fuses are rated for 250 V. Figure 2-3. Line M odule Detail[...]

Installation 28 Power Cord The pow er supply is shipped from the factory with a power cord th at has a plug appropri ate f or you r location. Figure 2- 4 shows th e standard configurat ion of plu gs used by Agilent Techn ologies. Below eac h drawi ng is the Agi lent part n umber for the replacem ent power cord equi pped w ith a plug of that conf i [...]

Installation 29 FIRE HAZARD . Make sure the replacement fuse is one of the same type (size) and rating (am ps) that is consiste nt with the vo ltage level yo u are o perating at. Do not use a substit ute fuse; use a fuse with the same Agile nt Part nu mber listed in T a b le 2-2. 6. Close t he door of the li ne modul e and in sert th e power cord i[...]

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Getting Starte d 31 3 Getting Started Introduction This chapter is inte nded for the first time user of the suppl y. It provides four main discu ssions: • Front Panel C ontrols an d Indicators • Tur ning o n Yo ur S up pl y • Checki ng O ut Y our Suppl y Usi ng Lo c al Co ntrol • Introduction to Re mote Operation First, t he supply ’ s fr[...]

Getting Starte d 32 Figure 3-1. Agilent 6626A Front Panel Table 3-1. Controls and Indicato rs Number Controls/Indicators Description Page 1 LCL key Ret urns power su pply to local mode (un less local lockout has been receiv ed via GP-IB). Also, turns the power s upply ’s dis play on if it was tu rned off via th e GP-IB. 3-13, 5- 2, 6-1 2 GP-IB St[...]

Getting Starte d 33 Table 3-1. Controls and Indicato rs (continued) Number Controls/Indicators Description Page 4 (cont) UNR - Indicates that the selected output channel is unregulated; i.e., it is not reg ulated by CV or CC co ntro l loops. 4-4 OCP ENBLD - Indicates that the overcurrent protection function for the selected channel is enabled. 3-8,[...]

Getting Starte d 34 Table 3-1. Controls and Indicato rs (continued) Number Controls/Indicators Description Page 7 Output Contro l K eys (T hese t welve ke ys are output dependent). OUTPUT S ELEC T - Selects one of the output channels for local contro l or display. This ke y allows the channels to be selected in f orward ( Ð ) or reverse ( Ï ) seq[...]

Getting Starte d 35 Table 3-1. Controls and Indicato rs (continued) Number Controls/Indicators Description Page 7 (cont) Ñ CURRE NT - Increases the selected output curren t by an LSB and then at a faster rate as the key is k ept pressed, or af ter the RANGE V/I key ha s b een p r essed , sets the selected output to the high cu rrent range. 3-9, 6-[...]

Getting Starte d 36 Turning On Your Supply The follow ing paragraphs des cribe the pow er-on sequence which includes a self test of most of the powe r supply ’ s circuits. Befo re yo u tur n o n yo ur supp ly, make sure that: • The line module on the rear panel is set to match your input li ne voltage. • The proper f use i s ins talled an d t[...]

Getting Starte d 37 Figure 3-4. T ypical Display at Power-O n Self-Test Er rors If the supply fails the po wer-on self-test, all po wer supply outputs will remain disabled (off) and the d isp lay will indicate the type of failure and the output chann el on which it occurred. Figure 3-5 shows that self-test detected an error in outpu t channel 3. Er[...]

Getting Starte d 38 Voltage Test 1. Set th e voltage of the selected output t o 10 V by pres sing: VSET 1 0 ENTER 2. Check that th e display reads approximat ely 10 V an d 0 A and th e CV annunciator is on indicat ing th at the supply is in the constant voltage mode of operatio n. Overvoltag e Test 1. Program the overvoltage prot ection (OVP) to 19[...]

Getting Starte d 39 6. Check that the display reads approximately 0 v olts and the programmable current limit valu e. Also, check that the front panel CC an nunciator is on i ndicating that the outp ut is in the co nstant curre nt mode of op eration. 7. Set th e current to 0.5 A by pressing: ISET . 5 ENT ER 8. Check th at the display reads approxim[...]

Getting Starte d 40 Enter/Output St atement s The programm ing s tatements y ou use to operate your su pply f ro m remote depen d on your computer an d its langu a ge. In particular, you n eed to know the statements your computer uses to output and enter information. For exam ple, the Agilent BASIC langua ge state ment that addresses t he power sup[...]

Getting Starte d 41 Sending a Remote Command To send the power supply a remote command, combine your computer’ s output statement with the GP-IB interface select code, the GP- IB device add ress, and f i nally, t he power su pply comman d. For exam ple, to set th e output v oltage of output channel 1 to 2 vo lts, send: Getting Data From The Suppl[...]

Getting Starte d 42 Each of these co mmands is briefl y discussed in the followi n g paragraphs to help you get started in progra mming your supply. To know more about the se co mmands, refer to Chapter 5 . The VRSET and IRSET commands select the range the power supply operates in. T wo rang es are available for each output - standard res olution ,[...]

Getting Starte d 43 Output On/ Off. You can tu rn a specified output on or off. In dividual outputs can be con trolled as shown below . To turn off output 1, send: OUTPUT 705; ’ ’ OUT 1,0" When an output i s turned o ff, it is set to 0 volts a nd to the minimum current li mit value To turn on output 1, send: OUTPUT 705; ’ ’ OUT 1,1&quo[...]

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Output Connections and Operating Information 45 4 Output Connections and Operating Information Introduction This chapter explains how to make conn ections to the output terminals located on the rear of your power supply . Some general operating in formation is i ncluded in t his chapter to help you understa nd ho w t he p o wer supply operates und [...]

Output Connections and Operating Information 46 Operating Quadrants Figures 4-2A and 4- 2B show the operati ng locus of your pow er supply in three quadran t s. The area in quadrant 1 shows the operating locus defined by t he voltage and current settings of each output. The area in quadran t 2 indicates the locus where each output can operate as a [...]

Output Connections and Operating Information 47 Figure 4-3 shows the c urrent sink characteristics lo wer voltages in greater detail. T he area in quadrant 4 illustrates the reverse polarity diode ch aracteristics of each output. Do not operate any output with reverse-voltage currents that are greater than the ma ximum rating o f the output. Figure[...]

Output Connections and Operating Information 48 The readback res olut ion of th e 25 watt ou tputs when meterin g voltages of 7 v olts or below, w ill be 483 µ V. For voltages above 7 volts, the read back resolutio n will be 3. 3 mV. The readback resolution of the 25 watt outputs when metering source curren ts of 15 mA o r below, the readback reso[...]

Output Connections and Operating Information 49 UNREGUL A T ED OUTPUT -- the supply i nforms the user when output regu lation is not guaranteed. This can occur when attem pting t o sink ex cessive cu rrents below 4 volts on 25 W out puts and 2 volts on 50 W outputs or when operati ng ou tp uts in parallel. The UNR annunciator on the front panel and[...]

Output Connections and Operating Information 50 Note To prevent trip p ing of the overvoltage circ uit, pick a wire size su fficie nt to hand le the FU LL output current of the unit no matter what the intended load curren t or current limit setting. Tab le 4-1 lists the res istivity for various wire sizes and t he maximu m lengths to limit t he vol[...]

Output Connections and Operating Information 51 Figure 4-4. Optimum Hookup for Multiple Loads, Local Sensing Note When a load is connected throug h relay or switch contacts, contact boun ce may activate the overvoltage circuit and shut down th e supply. Therefore, it is recommended that the ou tput be downprogrammed to 0 or turned- off (disabled) b[...]

Output Connections and Operating Information 52 Figure 4-5. Remote Voltage Sen sing The max imum volt age avail able at th e power su pply output t ermin als during re mot e sensing (see Figure 4-6) is 50.5 volts . This allo ws the sum of the volta ge across both lo ad leads to eq ual 1 0 volts maxi mum. For lo wer output voltage s refer to Figure [...]

Output Connections and Operating Information 53 Figure 4-6. Total Allowable Load Lead Voltage D rop (total of both leads) with Remote Sensing Output Noise Considerations Any noise picked up on the sense leads will appear at the suppl y’ s ou tp ut and may adversely affect CV lo ad regulation. Twist the sense leads or use a ri bbon cable to m inim[...]

Output Connections and Operating Information 54 Open Sense Lead s The sense leads are part of the su pply’ s feedback path. Connect them in such a way so that they do not inadv ertently become open circuited. The power supply inc ludes protection resistors that reduce the eff ect of open sense leads during remote-sensing operatio n. If the sen se[...]

Output Connections and Operating Information 55 Figure 4-8. External T rigger Circuit Figure 4-9. Equivalent Internal O V Trigger Circuit Power Supply Protection Considerations Battery Charging If you are using your supply in a battery charging applicati on, it is recomm ended that a series protect ion diode be a dded to prevent dam a ge to th e su[...]

Output Connections and Operating Information 56 Figure 4-10. Recommended Protection Circuit for Battery Charging Capacitive Load Limitation The programmable overvolta ge protectio n circuit can b e used to do wnprogram capacitive loads alt hou gh it is pri marily intended for us e as a protection feature as described on page 48. Repetitive (over 10[...]

Output Connections and Operating Information 57 Figure 4-11. Parallel Connections w ith Local Sensing CV Operation For CV operation, on e output m u st operate in CC mode and the other ou tput must operate in CV mode. Al though each output ope rates ind ependen tl y of the other, the o utp ut that is o perating in CV mode will be ’ ’ co ntro ll[...]

Output Connections and Operating Information 58 CC Operation For CC operatio n, set the output voltages as o utlined in CV o p eration (page 57 ), or alternatively, progra m the volta ge settings of both outputs to the same voltage limit point. Then program the current of each output so that the sum of both currents equals the total desired operati[...]

Output Connections and Operating Information 59 Series Operation SHOCK HAZARD . Floating volta ges must not exceed 240 Vdc. N o output terminal may be m ore than 240 Vdc f ro m ch assis groun d. Connec t in ser ies onl y outp uts that have eq uivale nt c urrent r a tings. Each o utput ha s a re ve rse vo lta ge protection d io de across its output [...]

Output Connections and Operating Information 60 CC Operation For CC operation, th e current setting of each output must be programm ed to the desired operating current . The sum of the voltage setti ngs deter mines the voltage li mit point. As an e xample, one way to progra m the voltage of the outp ut i s to set the voltage o f each output to one [...]

Output Connections and Operating Information 61 Voltage All series specifications referring to voltage are twice the single output specification except for progra mming resolution which is t he same as for a single outpu t. Current A ll series specifications referring to current are th e same as for a single output except for CC load eff ect, CC lo[...]

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Remote Operation 63 5 Remote Operation Introduction Chapter 3 i ntrodu ced you to th e basics of remote operation and provi ded a few simple exam ples using a Series 200/300 computer as the GP-IB controller. This chapter contains all the information required to control y our power supply remotely and discusses in greater detail how each of the comm[...]

Remote Operation 64 the SRQ annuncia tor regardless of whether t he condition that ca used the service req ue st continues to exi st. The service req ue st is also r emo ved when yo u se nd the " CLR ’ ’ c omma nd ( see p age 76 ). Remote/Local . The power supply can receive programming i nformation either from the GP-IB (rem ote) or fro m[...]

Remote Operation 65 Power-On S ervice Request (PON) The power supply can request service from the controller w hen the power is turn ed on. This request can be en abled or disabled by sending a PON comman d (see page 80). When th e request is enabled, the supply can gen erate an SRQ at power-on or when there is a momentary loss in power. You can ex[...]

Remote Operation 66 Table 5-1. Power Supply Commands (continued) Command Header Output Channel Data Range (Fig. 5-2) Synta x Query present h ardware error ERR? --- See Table 5-8 Q1 Query fault register FAUL T? 1, 2, 3, 4 --- Q2 Query th e model num ber of supply ID? --- --- Q1 Program the I DAC in count s IDAC 1, 2, 3, 4 See Serv ice Manual C4 Quer[...]

Remote Operation 67 Table 5-1. Power Supply Commands (continued) Command Header Output Channel Data Range (Fig. 5-2) Synta x Store present output state STO 0-10 C2 Query preset status of ou tput STS? 1, 2, 3, 4 Q2 Perform self test on GP-IB interface TEST ? . C1 Set bits in mask register UNMASK 1, 2, 3, 4 0-255 C4 Query bits set i n mask register U[...]

Remote Operation 68 Figure 5-2 (Sheet 1 of 2). Syntax Forms For Power Supply Commands[...]

Remote Operation 69 Figure 5-2 (Sheet 2 of 2). Syntax Forms For Power Supply Commands[...]

Remote Operation 70 Table 5-2. Pow er Supply Queries Query Header (Note 7) Channel (Note 1) Response (Notes 5 and 6) Initial Value Sy ntax (Fig. 5-2) Voltage Setting VSET? 1,2,3,4 SZD.DDD(Note 3) 0(Note 8) Q2 Current Setting ISET? 1,2,3,4 (Note 2) 10 mA (Note 8) Q2 Full Scale Current Range IRSET? 1,2,3,4 (Note 2) High (Not e 8) Q2 Full Scale Voltag[...]

Remote Operation 71 Initial Conditions Immediately after power on from the factory, the power supply auto matically undergoes a self-test and sets all parameters to the values contained in Table 5-3. The values in the first part of th e table come from storage register 0 an d were stored at the factor y. They will remain until ST O 0 is used to cha[...]

Remote Operation 72 VSET 1,.45 If the output cha nnel is operatin g in consta nt voltage mode (CV annu nciato r on) then the actua l volta ge is t he progra mmed voltage, but in CC mode of operatio n (CC annunciato r on), the progra mmed voltage i s the voltage li mit for that o utput. When programming a value of voltage, the current setpoin t will[...]

Remote Operation 73 Current Programming To program the current, send t he outpu t channe l and the prog ra mmed v alue in amps . In the exam ple below, out put 1 is programm ed to 15 mA. ISET 1,0.015 The va lue yo u send must al ways b e i n a mps. Fo r exa mple i f yo u want to pro gra m 95 millia mp s, c onver t to a mp s and the n send the comma[...]

Remote Operation 74 Output On/Off The OUT command disables /enables an outp ut chan nel o f the power suppl y. It will no t d isturb any other pr o grammed function no r will it reset the protectio n circuits. You ca n control indi vidual outp uts with the OUT command as sho wn below. For ex a mple, t o disable ou tput chann el 1 send th e followin[...]

Remote Operation 75 Overcurrent Protection (OCP ) The OCP is a protection feature em plo yed by the pow er supply to gu ard against excessive outpu t currents. When the ou tput enters the + CC mode and th e OCP is enabled, the OCP circuit down program s the output voltage and disables the output. To enable the OCP, for outpu t channel 1, send the c[...]

Remote Operation 76 The Clear Command This command will return the po wer suppl y to its power-on state and all para meters are returned to their initial p o wer-on values except for the following : 1. The store/recall registers are not cleared. 2. The pow er supply remai ns addresse d to lis ten. 3. The PON bit in the serial poll register is clear[...]

Remote Operation 77 Table 5-5. Bit Assignment for the Status, Astatus, Fau lt, and M ask Registers Bit Po sitio n 7 6 5 4 3 2 1 0 Bit We ight 128 64 32 16 8 4 2 1 Meaning CP OC UNR OT OV -CC +CC CV Where CV = Consta nt V o ltage M ode + CC = P o sitive Consta nt C urrent Mode - CC = Negative Current Limit Mode OV = Overvoltage Pr otection circuit t[...]

Remote Operation 78 UNMASK 2,XXX where XXX specifies the numeric code (0 to 255) for the u nmasked conditions (s ee Table 5-5). If durin g operation, th e output experie nces a ny of the previo usly unmasked co nditions, it will se t the co rresponding bit(s) in it s fault register. Remember that the bits in the fault register can be set when there[...]

Remote Operation 79 Service Request Generation When operating your supply, you may want it to request service e very time a fault or a p r o gramming error condition occurs. To do this you send a service reque st (SRQ) command. W hen the conditio n is true, th e power suppl y responds by setting the RQ S bit in the serial po ll register, setti ng t[...]

Remote Operation 80 The ability to generate ser vice requests can be enabled o r disabled usin g t he SRQ command as de scrib ed belo w. To disable the service req uest capab ility, except for power-on, send: SRQ 0 To enable the service reque st capability for all output faults, send: SRQ 1 To enable the service request capab ility for errors, send[...]

Remote Operation 81 Reprogra mming delay will delay the onset o f certai n fa ult co nditio ns a nd prevent t he po wer suppl y from registering a fa ult when these conditions are true. When the delay is in effect, the CV, + CC, - CC and UNR bits of th e status register are masked and canno t communicate with the mask and fault registers and the OC[...]

Remote Operation 82 Other Quer i es In the examples discussed above, y ou saw how to use queries for each function discussed. T he following paragraphs describe oth er queries whi ch were not previous ly covered. ERROR Query . The power su pply can detect both prog ra mm ing and ha rdware errors. You can use eith er the front panel (see page 89) or[...]

Remote Operation 83 To enable all outputs i n constant current mod e at turn on send: DCP ON 2 To d i sa ble a ll o utputs i n c o nstant c urre nt mode a t turn -on se nd: DCPON 3 Table 5-8. E rror M essages Front Panel Response GP-IB Code Explanation NO ERROR 0 This is the res ponse to the ER R? query when th ere are no errors. INVALID CHAR 1 You[...]

Remote Operation 84 Table 5-8. E rror M essages (continued) Front Panel Response GP-IB Code Explanation HDW ERR CH 1 11 Errors 11 through 14 refer to a specif ic output where there is an output error. Service is required. HDW ERR CH 2 12 Same as in Error #11 . HDW ERR CH 3 13 Same as in Error #11 . HDW ERR CH 4 14 Same as in Error #11 . NO MODEL NU[...]

Local Operation 85 6 Local Operation Introduction Chapt er 3 in troduced y ou to th e supply’ s front panel cont rols an d indicat ors to h elp you tu rn on th e supply and perf orm t he checkout procedures that were g iven in that chapter. The following parag raphs describe how to use all of the front pan el controls and in dicators. Most of the[...]

Local Operation 86 Figure 6-1. Front P anel (Model 6626 A shown) Pressing t he ENT ER ke y will enter the value s d isplayed for the fu nction indicated , initiate tha t func tion, and retur n the display to the meterin g mode in which the meas ured output volta ge a nd current for the selected o utput are displa yed. Pressing the ENT ER key withou[...]

Local Operation 87 The vo ltage step keys c a n also be used to cha nge the voltage setti ng. VSET Ñ VOLT or Ò VOLT then ENTER The voltage can be set in the imm ediate execute mode. This mode is in effect when backgroun d metering is in effect. Pressing Ñ VO LT or Ò VOLT will c ha nge t he se tting and the effect on the voltage and cu rrent can[...]

Local Operation 88 Setting Overvoltage Protection Programm able overv oltage protect ion (OVP) gu ards you r load again st overvol tage by crow barring an d downprog ramming the power supply output if the programmed overvoltage setting i s exceeded. A fixed OV circuit with a trip lev el about 20 percent abov e the maximum programmable v oltage acts[...]

Local Operation 89 For exam ple, you can change t he address of your su pply to 10 by pressing : ADD R 1 0 EN T ER Displaying Error Messag es The power su pply can detect both programming and hardwa re errors. Upon detect ing an error, the ERR annun ciator on th e front panel comes on a nd the ERR bit in t he serial po ll register will be set (see [...]

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A lig nment Procedures 91 A Alignment Procedures Introduction This appendix contains the sof tware alignment procedures for the pow er s upply. These supplies should be aligned tw ic e a year, or wh enever certain repairs are made (see Service Manual). The equipm ent that you need and the test setups to perform the alignment are also shown. A listi[...]

Alignment P rocedures 92 The program con tains embedded comments (iden tified by a leading asterisk {! } ) which explain various sections and procedures. To reduce k eyst roking, th e program may be s hortened t o a min imum num ber of lin e s by elim inating th ese comme nt s. The alignm e nt prog ram is available on a 5¼ floppy (Agi lent P/N 066[...]

A lig nment Procedures 93 After testing of a chan nel is co mpleted, the p r o gram will check if any errors ha ve o ccurred (the subpro gram is called in line 850 and perf ormed in lines 3670 - 3780 ). If an error h as occurred, a m essage will be sent to the output dev ice ( CRT). After all outputs are tested wi thout errors, th e CAL MODE w ill [...]

Alignment P rocedures 94 Figure A-3 Figure A-4 Figure A-5[...]

A lig nment Procedures 95 Alignment Program 10 ! This program called "ALIGN_6626" w i ll alig n 20 ! th e Agilen t6625A, 26, 28 and 29A Pow er Suppl ies It 30 ! requi res an Agil ent3458A DM M and a four t erminal 40 ! 0.1 ohm current shunt accu rate to +/-50 ppm 50 ! 60 ! May 06,l989 Rev A.03.01 70 ! 80 Clear_screen ! Call prog ram to cl[...]

Alignment P rocedures 96 Alignment Program (continued) 530 ! -1 is reverse polarit y, this saves 540 ! reversing leads as sink channel 550 ! becomes the sou rce for other channe l 560 Chan =1 ! Select channel t o cal sink (-CC ) 570 Other_chan =2 ! Select curren t source channe l 580 Get_data ! Cal l program with rang e data 590 Cal_si nk (Irng_hi [...]

A lig nment Procedures 97 Alignment Program (continued) 1050 ! 1060 ! 1070 ! 1080 DEF FNDci(I_ran ge) ! Fun ction t o read current 1090 COM /Vm/ @Vm 1100 COM /Shun t / Shunt_r 1110 IF I_rang e=2 THEN ! 2A must read across sh unt 1120 Amps=FNDcv/ Shunt _r ! Conv ert shunt voltag e to Amps 1130 ELSE! ! <2A read direct from DMM 1140 OUTPUT @Vm ;&qu[...]

Alignment P rocedures 98 Alignment Program (continued) 1570 PRINT "Press C ONTINUE wh en ready 1580 PAUSE 1590 Output_on 1600 ! 1610 Cal_v : ! 1620 Clear_screen 1630 PRINT "Calibratin g the";V _range;" volt ra nge pr o gra mmin g” 1640 ! 1650 OUTPUT @Ps;"VRSET" ;C han,V_ran ge ! S et voltag e range 1660 ! 1670 OUTPUT[...]

A lig nment Procedures 99 Alignment Program (continued) 2090 ! 2100 ! 2110 Cal_curren t: SUB Cal_curren t(I_rang e) ! Subprogram to cal curren t 2120 COM /Ps/ Ch an,Other_ch an,@Ps,Model$[7] 2130 ! 2140 IF I_rang e= .5 THEN GOTO Cal _i ! Skip setu p instructions 2150 ! 2160 Output_of f 2170 ! 2180 Clear_screen 2190 PRINT "Set up ou tput";[...]

Alignment P rocedures 100 Alignment Program (continued) 2610 Irlo=FNDci(I_ran ge) ! Read low output current 2620 ! 2630 OUTPUT @Ps;"IRHI";Ch an ! Set high readback cu rrent 2640 REPEA T ! Wait for su pply to fini sh 2650 UNTIL BIT(SPOL L(@Ps),4) ! Fini shed wh en Bit 4 goes true 2660 Irhi=FNDci (I_range) ! Read h igh output current 2670 ![...]

A lig nment Procedures 101 Alignment Program (continued) 3130 PRINT "Calibratin g output";Ch an;"";I_range; "A current s ink readback" 3140 ! 3150 OUTPUT @Ps;"IRSET";Ch an,I_range;";IRS ET";Other chan ,I_range 3160 ! Set I rang e for source and 3170 ! sink range 3180 OUTP UT @Ps; “ISET”;Other_ch[...]

Alignment P rocedures 102 Alignment Program (continued) 3650 ! 3660 ! 3670 Check _error:SUB Ch eck_error ! Su bprogram to check for errors 3680 COM /Ps/ Ch an,Other_ch an,@Ps,Model$[7] 3690 Clear_screen 3700 PRINT “Checking for errors” 3710 OUTPUT @Ps;”ERR ?” ! Qu ery supply for errors 3720 ENTER @Ps;Err ! Enter the error num ber 3730 IF Er[...]

Programming w ith a Series 200/3 00 Computer 103 B Programming With a Series 200/300 Computer Introduction The purpose of thi s appendi x is t o serve as an i ntrodu ction to prog rammi ng your pow er supply with an HP Series 200/300 computer using the BASIC langu age. Examples are included that employ some of the m ost frequently used functions. T[...]

Programming with a Series 200/300 Computer 104 VOLTAGE AND CURRENT PROGRAMMING WITH VARIABLES You can use variables in a prog ram to represent data v alues in the device commands. This is useful in applications that require changing the voltage and current values to diff erent predetermined settings. The following program uses a variable in a FOR N[...]

Programming w ith a Series 200/3 00 Computer 105 10 ASS IGN @Ps TO 705 20 OUTPUT @Ps;’ ’ VSET ?1’ ’ 30 ENTER @Ps; Vsl 40 OUTPUT @Ps; "ISET?1" 50 ENTER @ Ps;Isl 60 PRINT ’ ’ VO LTAGE SETTI NG OF OUTP UT #1 = ";Vsl 70 PRINT "CURRENT LIMIT SETTING OF OUTP UT #1 = ";Isl 80 END Line 10: Assigns the I/ O pathnam e to [...]

Programming with a Series 200/300 Computer 106 Service Reque st and Ser ial Poll The fault and mask reg isters, when used in conjunction with the serv ice request and serial poll functions, allow you to select which conditions can cause computer interru pts. The fault and mask registers can also be used independently of the serial poll or service r[...]

Programming w ith a Series 200/3 00 Computer 107 Error Det ection The power su pply can recognize programm i ng errors an d can inform y o u when a prog ramming error occu rs. W hen an error is detected, no atte mpt is made to execute the co mmand. Instead, a bit in t he serial poll register is set. If SRQ2 o r SRQ3 is set, an interrupt will be ge [...]

Programming with a Series 200/300 Computer 108 LINE 10: Assigns the I/O path name to the power su pply . LINE 20: Declares a co mm on block for the I/O path n ame. LINE 30: Defines in terrupt on softkey depression an d branch t o error routin e. LINE 40: Idles on soft ke y definition. LINE 80: Defines subprogram Err _ trap LINE 90: Disab les i nter[...]

Command Summar y 109 C Command Summary Introduction For conveni ence, a “quick reference” listing tabulating general command headers, an d calibration command headers is shown at the beginn ing of Table C- 1 (page 110). (Note that cal ibration com mands are described in deta il in Appendix A .) Table C-2 (pages 111- 115) provides an alphabetica[...]

Command Summary 110 Table C-1 Quick Refer ence Listing of Commands General Commands * * ** * ** ** ** * ASTS? < ch > CLR CMODE < 1 (on) or 0 (off ) > CMODE? DCPON < 1 (on) or 0 (off ) > DLY < ch >, < delay time > DLY? < ch > DSP < 1 (on ) or 0 (of f)> DSP < " string" > DSP? ERR? FAULT? < [...]

Command Summar y 111 Table C-2 Command Summary ASTS? < ch > Queries the accumulated status (ASTS) of the specified ou tput < ch > . The response (integ er 0-255) represents t he sum of the binary weig hts of the ASTS reg ister bit s (see page 77). T he ASTS register is a utomatically set to the p resent status a fter being queried. CLR [...]

Command Summary 112 Table C-2 Command Summar y (continued) ID? Queries the iden tificati on (m odel number) of the su pply. (see page 82). IDATA < ch >, < Ilo > , < Ih i > Sends data to calibrate the current setting circu its of the specified output < ch >. Ilo and Ihi are measured values which the supply uses to calculate c[...]

Command Summar y 113 Table C-2 Command Summar y (continued) NIDAT < ch > . < Ilo > . < Ih i > Sends data to calibrate - cu rrent readback for the selected ou tput < ch > . This command must be sent af ter IRLN and IRHN commands. OCP < ch >, < x > Enables the over current protection circuit protection circu it for[...]

Command Summary 114 Table C-2 Command Summar y (continued) ROM? Queries the revision date of the pow er supply’ s firmware. See service manual. SROM? Queries the revision date of the secondary ROM. See service manual. SRQ <X> Sets the causes for generating SRQ. Setting < x > can be a 0, 1, 2, or 3 as describe d on page 79. SRQ? Querie[...]

Command Summar y 115 Table C-2 Command Summar y (continued) VMUX? < ch > , < x > Queries the measurement of the i nput < x > to t he analog multiple xer on the specified output < ch > (see Appendix A ). VOUT? < ch > Queries the measured outpu t voltage of the specif ied output < ch > (see page 70). The response i[...]

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Error Code s and M essages 117 D Error Codes and Messages Introduction This appendix describes the GP-IB error codes that can be readback to the con troller and the error m essages that can be displayed on the power su pply’ s front panel. A brief explanation of each code and m e ssage is also given. The error codes and/or messages fall i nto thr[...]

Error Codes and M essag es 118 Table D-2. ERROR Respons es (continued) Error Cod e (ERR? query) Message (ERR key) Explanation 3 I NVALID ST R You sent a co mmand the supply does not understand. Resend recognizable comm and. 4 SYNTAX ERROR You se nt a comman d with im proper syntax. Ch eck synt ax of y our command (see Chapter 5). 5 NUMBE R R ANG E [...]

Error Code s and M essages 119 Table D-2. ERROR Respons es (continued) Error Cod e (ERR? query) Message (ERR key) Explanation 18 CAL LOCKED Calibration was atte mpted with the calibration j umper on the GP-IB board in the lo cko ut position (See Sectio n IV in the Service Manual). Reposition t he j u mper and re-calibrate if this is desired. 22 SKI[...]

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M anual Backdating 121 E Manual Backdating Introduction The backd a ting i nformation i n this chapter ap p lies to units tha t have the following serial numbers: Agilent Model 6625A . serials 2831A- 00101 to 00663 Agilent Model 6626A , serials 2831A- 00101 to 00823 Agilent Model 6628A , serials 2922A- 00101 to 00232 Agilent Model 6629A , serials 2[...]

Agilent Sales and Support Office 122 A gilent Sales and Support Office For more in formation abo ut Ag ilent Technolog ies test a nd measurem ent product s, applica tions, s ervice s, and fo r a curre nt sales office listing, visit our we b site: http://www.agil ent.com/find/tmdir You can also contac t one of the fo llowing centers and ask for a te[...]

1 23 Manual Updates The following updates have b een made to this manual since the print revision indicated on the title page. 2/01/00 All references to HP have been changed to Agilent. All re fer e nce s to H P-I B have b e en cha n ged t o GP IB . 9/20/04 The Declaration of Conformity has been updated.[...]