Agilent Technologies 6628A manual

OPERATING MAN UAL MULTIPLE OUTPUT LINE AR SYSTEM DC POWER SUPPLY A GILENT MODELS 6625A, 6626A , 6628A , and 6629A A gilent Part No 06626- 90001 Agilent M odel 6625A, Serial s 3210 A-00664 and A bove* Agilent M odel 6626A, Serial s 3209 A-00824 and A bove* Agilent M odel 6628A, Serial s 3213 A-00233 and A bove* Agilent M odel 6629A, Serial s 3210 A-[...]

2 CERTIFICATION Agilent Technologies certifies that this pr oduct met its published specifications at time of shipment from the factor y. Agilent Technologies further cer tifies that its calibration measur ements are traceable to the United States N ational Bureau of Standards, to the extent allowed by the Bur eau’ s calibration facility, an d to[...]

3 SAFETY SUMMARY The followi ng gener al safety p recauti ons must be obser ved during all pha ses of opera tion, service, and repair of this instrument. F ailure t o comp ly with th ese precau tions or with specific warnin gs elsewhere in this manual violate s safety standards of design, manufa cture, a nd i ntended us e of the instrument. A gilen[...]

4 SAFETY SUMM A RY (continued) GENERAL Any LEDs us ed in this prod uct are Clas s 1 LED s as pe r IEC 825-1. ENVIRONMENTAL CONDITI ONS This ins trume nt is inte nded f or indoor use i n an inst allati on cate gory II, pollution de gre e 2 envi ronme nt. It is de signe d to operate a t a m aximum re lative hum idit y of 95% a nd at altit udes of up [...]

5 DECLARATION OF CONFORMITY according to ISO/IEC Guide 22 an d EN 45014 Manufa cture r’ s Na me: Agilent T echno logies Manufactu rer’ s Address: 150 Green Pond R oad Rockaway, New Jersey 07866 U.S.A. declares that the Product Product Na me: a) Multiple-Outp ut S yste m Power Supply b) Precision Multiple -Output Syste m Power Supply Model Num b[...]

6 WHAT THIS MANUAL CONTAINS It contains infor mation relating to the in stallation, ope ratio n, and programming of these s upp lies as outlined belo w. Maintenan ce and troublesh ooting i nstructi ons are given in a separate Servi ce Manual (Agile nt Part No. 06626- 90003). Chapter 1.--General Information Chapter 1 contains a g eneral 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 Sen[...]

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

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General In formation 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 Ag ilent 6625A, 6626A , 6628A, and Agi lent 6629A power su pplies. Unl ess stat [...]

General Information 12 Accessorie s 10833A GP-IB cable, 1 m (3.3 ft) 10833B G P-IB cable, 2 m (6.6 f t) 10833C GP- IB cable, 4 m (13.2 f t) 10833D GP-IB ca ble, 0.5 m (1.6 f t) 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 power [...]

General In formation 13 The power supplies allow up to a 10 v olt sense lead drop. This feature m akes them ideal for test system applications where remote sensin g is us ed. The output voltage an d current for any output can be monitored w ith the front panel display . Output specif ic error mess ages are also displayed. Fr ont pane l annunc ia to[...]

General Information 14 Basic Operation Figu re 1-2 is a block diag ra m that ill ustrat es the ma jor assem blies contain ed with in th e power su pply. As shown in the figure, each supply includes a power transf ormer, two or m ore output boards, a GP-IB boa rd, and fron t panel (display an d contro l keys). Figure 1-2. Block Di agram The appropri[...]

General In formation 15 Output Boards The outpu t boards are lin ear dc power su pplies. Each isolated ou tput operating bou ndary cu rve is sh own in F igure 1-1. The ac input to each ou tput board is rectified an d applied to a regulator circuit. Each output board em ploys series regulation techniques. A regulator elemen t is connected in series [...]

General Information 16 Output response time : Beginning at the time the power su pply has finished processing a VSET command (change output volta ge), the maxi mum time for the outpu t vo ltage to settle to within a settling b a nd about the final val ue from any specifi ed operating point. This v alue must be added t o the com mand processing time[...]

General In formation 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 specifications may degrade slightly when the un it is subjected to an RF f ield equal to or greater than 3 v olts/meter. Voltag e 0.016[...]

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 Ra nge 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 formation 19 Table 1-3. Supplemental Ch aracteristics (continued) High Line Inrush Cur rent: 100 V O pt 120 V Opt 220 V Opt 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. AH1, T6, L4, SR1, RL 1, PP1, DC1, DT0, C0, E1 Current Sink Capability: 25 W[...]

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 m V 0.25 m V 0.25 mV + Curren t 0.005 mA 0.005 mA 0.01 mA 0.01 mA[...]

General In formation 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 Mode[...]

General In formation 23 Figure 1-7. Output Impedance (Typical) G raph (See Supplemental Characte ristics)[...]

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Installation 25 2 Installation Introduction This chapt er contai ns instru c tions f or checking and moun ting your pow er supply, conn ecting your supply to ac power, converting it f rom one line voltage to another, and connecting the GP-IB cable. The pow er supply generate s operating magnetic fields whi ch may aff ect the operati on of ot her in[...]

Installation 26 Figure 2-1. Ou tline Diagram Input Power Requirements You can operate this pow er supply from a nom inal 100 V, 120 V, 22 0 V or 240 V s ing le phase power s ource at 47 to 66 Hz. The input voltage rang e, maximum inpu t current, high line inru sh current (PK), and the fu se required for each of the nomin al inpu ts are lis ted in T[...]

Installation 27 Figure 2-2. Rear Panel Detail ( A gilent 6626 A Shown) Table 2-2 Line Fuses Line Voltage Fuse Needed Agilent Part Number (for ¼ X 1¼ in . fuses only) 100/120 V 8AM 2110-03 42 220/240 V 4AM 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 sh ipped from the fact ory with a pow er cord that has a pl ug appropriat e for y our location. Figu re 2-4 shows th e standard configurati on of plu gs used by Agilent Techn ologies. Below each drawing i s the Agile nt part num ber for the replacem ent power cord equi pped with a plug of that conf ig[...]

Installation 29 FIRE HAZARD . Make sure the replacement fuse is one of the same type (size) and rating (amps) that is consiste nt with the volta ge level you are o p erating at. Do not use a s ubstitute fuse; use a fuse with the same Agile nt Part number li sted in Table 2 -2. 6. Close t he door of t he lin e module an d insert the pow er cord in t[...]

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Getting Starte d 31 3 Getting Started Introduction This chapter is inte nded for the first time user o f the supply. It provides four main discussions: • Front Panel C ontrols an d Indicators • Tur ning o n Yo ur Supp ly • Checki ng Out Y o ur Sup ply Us ing Lo cal Co ntro l • Introduction to Re mote Operation First, t he supply’ s f ro n[...]

Getting Starte d 32 Figure 3-1. A gilent 6626 A Front Panel Table 3-1. Controls and Indicato rs Number Controls/Indicators Description Page 1 LCL key Ret urns power su pply t o local mode (un less local lockout has been receiv ed via GP-IB). Also, turns the power s upply’ s displ ay on if it was turned of f via the GP-IB. 3-13, 5- 2, 6-1 2 GP-IB [...]

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 contro 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 twel ve keys a r e output dependent). OUTPUT S ELECT - Selects o ne of the output channels for local contro l or display. This key allo ws the channels to be selected in f orward ( Ð ) or reverse ( Ï ) se[...]

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 been p ressed , sets the selected output to the high cu rrent range. 3-9, 6- 3[...]

Getting Starte d 36 Turning On Your Supply The follow i ng paragraphs des cribe the pow er-on sequence which includes a self test of m ost of t he power su pply’ s circu its. Befo re yo u turn o n your sup ply, make sure tha t: • The line module on the rear panel is set to match your input line voltage. • The proper f use i s inst alled and t[...]

Getting Starte d 37 Figure 3-4. T ypical Display at Pow er-On Self-Test Er rors If the supply fails the po wer-on self-test, all po w er suppl y outputs will remain disab led (off) and the display will indicate the type of failure and the output channel on which it occurred. Figure 3-5 shows that self-test detected an error in output channel 3. Err[...]

Getting Starte d 38 Voltage Test 1. Set th e voltage of the select ed output t o 10 V by press ing: VSET 1 0 ENTER 2. Check that th e display reads approxim ately 10 V and 0 A and the C V annunciat or is on i ndicating that th e supply is in the constant voltage mode o f operation. Overvoltag e Test 1. Program the overvoltage protect ion (OVP) to 1[...]

Getting Starte d 39 6. Check that the display reads approximately 0 v olts and the programmable current limit value. Also, check that the fron t panel CC an nunciator is on ind icating t hat the output is i n the consta nt current mode o f op eration. 7. Set th e current t o 0.5 A by pres sing: ISET . 5 ENT ER 8. Check th at the display reads appro[...]

Getting Starte d 40 Enter/Output St atements The programm ing st atements you u se to operate y our supply from remote depend on y o ur co mputer and its language. In particular, you n eed to know the statements your computer uses to output and en ter information. For example, the Agilent BASIC langua ge state ment t hat ad d resses the po wer supp[...]

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 addres s, and f inally, th e power supply co mmand. For ex ample, to s et the ou tput voltage of output channel 1 to 2 vo lts, send: Getting Data From The Supply [...]

Getting Starte d 42 Each of these co mmands is briefl y discussed in t he following paragrap hs to help you ge t started in pro gramming your supply. To know more about these co mmands, refer to Chapter 5. The VRSET and IRSET commands select the range the power supply operates in. T wo ran ges are available for each output - standard res olution , [...]

Getting Starte d 43 Output On/ Off. You can turn a specif ied output on or of f. Indivi dual outputs can be controlled as sh own 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 and to the minimu m current li mit value To turn on output 1, s end: OUTPUT 705; ’ ’ OUT 1,1&qu[...]

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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 c hapter to help you und erstand ho w the power suppl y operates und er[...]

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 ts. The area in qu adrant 1 s hows th e operating locus defined by t he voltage and curren t settings of each output. The area in quadran t 2 indicates the locus where each output can operate as[...]

Output Connections and Operating Information 47 Figure 4-3 shows the c urrent sink characteristics lo wer voltages in greater d etail. The area in quadrant 4 illustrate s 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. Figur[...]

Output Connections and Operating Information 48 The readback res oluti on of th e 25 watt ou tputs when metering voltag e s of 7 v olts or below , will be 483 µ V. For volta ge s 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 or belo w, the readback re[...]

Output Connections and Operating Information 49 UNREGUL A T ED OUTPUT -- the supply informs the user when outpu t regulation is not guaranteed. This can occur when attem pting to si nk excess ive current s below 4 vol ts on 25 W ou tputs and 2 volt s on 50 W ou tputs or when operati ng ou tp uts in parallel. The UNR annunciator on the front panel a[...]

Output Connections and Operating Information 50 Note To prevent trip p ing of the overvoltage circ uit, pick a wire size sufficient to handle the FU LL ou tput 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 vario us wire sizes and the maximum lengths to li mit the voltag[...]

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 bounce 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) be[...]

Output Connections and Operating Information 52 Figure 4-5. Remote Voltage Sen sing The max imum voltag e availabl e at the pow er supply output termin als during rem ote sensing (see Figure 4-6) is 50.5 volts . This allo ws the sum of the volta ge acro ss both load lead s to equal 10 vo lts maximum. For lo wer output vo ltage s refer to Figure 4- [...]

Output Connections and Operating Information 53 Figure 4-6. Total Allowable Load Lead Voltage Drop (total of both leads) w ith Remote Sensing Output Noise Considerations Any noise picked up on the sense leads will appear at the supply’ s o u tput and may adversely affect CV lo ad regulation. Twist the sense leads or use a ribbon cable to m i nimi[...]

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 th at they do not inadvertently become open circuited. The power supply includes 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 appl ication, i t is recommen ded that a s eries protection di ode be added t o prevent dam a ge to th e [...]

Output Connections and Operating Information 56 Figure 4-10. Recommended Protection Circuit for Battery Charging Capacitive Load Limitation The programmable overvolta ge protection circuit can b e u sed to do wnprogram capacitive load s although it is p r i marily intended for us e as a protection feature as described on page 48. Repetitive (over 1[...]

Output Connections and Operating Information 57 Figure 4-11. Parallel Connections w ith Local Sensing CV Operation For CV operation, on e output m ust operate in CC mode an d the other outpu t must operate in CV mode. Although each output ope rates ind ependentl y of the other, the outp ut that is op e ratin g in CV mode will be ’ ’ co ntro lli[...]

Output Connections and Operating Information 58 CC Operation For CC operatio n, set the output vo ltages as outlined in CV operatio n (p age 57), or alternatively, pr o gram 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 voltages must not exceed 240 Vdc. N o output term inal may be more than 240 Vdc f ro m ch assis groun d. Connec t in seri e s only o utp uts tha t have eq uivale nt curr ent rati ngs. Eac h output ha s a re ve rse volta ge protection d io de across its output t[...]

Output Connections and Operating Information 60 CC Operation For CC operation, th e current setting of each output must be programmed to th e desired operating cu rrent. The sum of th e voltage setti ngs deter mines the voltage limit p o int. As an example, one way to pro gra m the voltage of the outp ut i s to set the voltage o f each output to o [...]

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 output. Current A ll series specifications referring to current are the same as for a single outpu t except for CC load eff ect, CC loa[...]

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Remote Operation 63 5 Remote Operation Introduction Chapter 3 i ntrodu ced you to th e basics of remote operation an d provided a f ew sim ple examples usi ng a Series 200/300 computer as the GP-IB controller. This chapter contains all the information required to control you r power supply rem otely and discusses in greater detail how each of the c[...]

Remote Operation 64 the SRQ annuncia tor regardless of whether the cond ition that caused the service request conti nues to exist. T he service req ue st is also r e moved whe n you se nd the " CLR ’ ’ c omma nd (s e e page 7 6). Remote/Local . The power supply can receive programming information either from the GP-IB (rem o te) or fro m t[...]

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

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 su pply ID? --- --- Q1 Program the I DAC in counts IDAC 1, 2, 3, 4 See Service Manual C4 Query[...]

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 TES T? . C1 Set bits in mask register UNMASK 1, 2, 3, 4 0- 255 C4 Query bits set i n mask register [...]

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(Not e 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 (Note 8) Q2 Full Scale Voltag[...]

Remote Operation 71 Initial Conditions Immediately after power on from the factory, the power supply automatically 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 and were stored at the factor y. They will remain until STO 0 is used to change[...]

Remote Operation 72 VSET 1,.45 If the output cha nnel is operating i n constant voltage mode (CV an nunciator on) the n t he actual volta ge is t he programmed voltage, but in CC mode of operation (C C annunciator o n), the p r o grammed volta ge i s the voltage li mit for that output. When programming a value of voltage, the current setpoint will [...]

Remote Operation 73 Current Programming To program the current, send t he outpu t channel an d the program med va lue in am ps. In th e e xam ple below, output 1 is programm ed to 15 mA. ISET 1,0.015 The va lue you se nd must alwa ys be i n amps. Fo r exa mple i f you want to p r ogra m 95 mil lia mps, c onvert to amp s a nd then send the command I[...]

Remote Operation 74 Output On/Off The OUT command disables /enables an outp ut channel of the po wer supply. It will not disturb an y other programmed function no r will it reset the protection circui ts. You can co ntrol individ ual o u tputs with the OUT command as sho wn below. For ex ample, t o disable out put channel 1 send the foll owing: OUT[...]

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

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

Remote Operation 77 Table 5-5. Bit Assignment for the Status, Astatus, Fau lt, and Mask Regi sters 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 o de + CC = Positive Con stant Current Mod e - CC = Negative Current Limit Mode OV = Overvoltage Pr otection circuit tr[...]

Remote Operation 78 UNMASK 2,XXX where XXX specifies the numeric code (0 to 255) for the un masked conditions (see Table 5-5). If during operation , the output experie nces a ny of the previousl y unmasked cond itio ns, it will set the correspo nding bit(s) in its fault re gister. Remember that the bits in the fault register can be set when there i[...]

Remote Operation 79 Service Request Generation When operating your supply, you ma y want it to request service e ver y time a fault or a progra mming error cond itio n occurs. To do this you send a service request (SRQ) co mmand. When the cond ition is true, the po wer supply responds by setting the RQ S bit in the serial po ll regi ster, setting t[...]

Remote Operation 80 The ability to generate ser vice requests can be enabled or disabled using t he SR Q co mmand as described b e lo w. To disable the service req uest capab ility, except for p o w er-on, se nd: SRQ 0 To enable the service reque st capability for all output faults, se nd: SRQ 1 To enable the service request capab ility for errors,[...]

Remote Operation 81 Reprogra mming delay will dela y the onset of certain fault co nd itions a nd prevent the po wer supply from registerin g a fault when these conditions are true. When the delay is in effect, the CV, + CC, - CC and UNR bits of the status register are masked and canno t communicate with the mask and faul t registers and t he OCP f[...]

Remote Operation 82 Other Quer i es In the examples discussed above, y ou saw how to use queries for each function discussed. The following parag raphs describe oth er querie s whi ch were not prev iously co vered. ERROR Query . The power su pply can det ect both prog ramming and hardw are errors. You can use either th e front pan el (see page 89) [...]

Remote Operation 83 To enable all outputs i n constant current mod e at turn o n send: DCPON 2 To d i sa ble all o utputs in co nstant c urrent mode at t urn-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 there are n o errors. INVALID CHAR 1 You sent[...]

Remote Operation 84 Table 5-8. E rror Messages ( continued) Front Panel Response GP-IB Code Explanation HDW ERR CH 1 11 Errors 11 through 14 refer to a specifi c output where th ere is an output error. Service is required. HDW ERR CH 2 12 Sa me as in Error #11. HDW ERR CH 3 13 Sa me as in Error #11. HDW ERR CH 4 14 Sa me as in Error #11. NO MODEL N[...]

Local Operation 85 6 Local Operation Introduction Chapt er 3 int roduced y ou to th e supply’ s fron t panel controls an d indicat ors to h elp you turn on the su pply and perform the checkout procedures that were g iven in that chapter. The following paragraphs describe h ow to use all of the front panel controls and indi cators. Most of the rem[...]

Local Operation 86 Figure 6-1. Front P anel (Model 6626 A shown) Pressing t he ENT ER key will e nter the values disp layed for the functio n i ndicated, initiate tha t function, and return the display to the meterin g mode in which the measured o utput voltage a nd current for the selected outp ut are d isplayed. Pressing the ENT ER key without e [...]

Local Operation 87 The vo ltage step ke ys ca n also be used to c ha nge the voltage se tti ng. VSET Ñ VOLT or Ò VOLT then ENT ER 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 VOLT or Ò V O LT will c ha nge t he setti ng and the effect on the voltage and cu rrent[...]

Local Operation 88 Setting Overvoltage Protection Programm able overv oltage protection (OVP) gua rds your l oad against overvoltage by crowbarring an d downprogramming the power supply output if the programmed overvoltage setting i s exceeded. A fixed OV circuit with a trip lev el about 20 percent above th e maximum programmable v oltage acts as a[...]

Local Operation 89 For exam ple, you can change the addres s of y our supply to 10 by pressi ng: ADD R 1 0 E NT ER Displaying Error Messages The power su pply can detect both programm ing and hardware errors . Upon detecti ng an error, the ERR an nunciator on the front panel comes on a nd the ERR bit in the serial po ll regi ster will be set (see p[...]

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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 supply. 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 alignm e nt are also shown. A list[...]

Alignment P rocedures 92 The program con tains embedded comments (iden tified by a leading asterisk {! } ) which explain variou s sections and procedures. To reduce key stroking, the prog ram m ay be short ened to a mi nimum num ber of lines by elim inating th ese comme nts. The alignm e nt prog ram is available on a 5¼ floppy (Agilent P/N 06626- [...]

A lig nment Procedures 93 After testing of a chan nel is co mpleted, the pro gram will check if any errors have o ccurred (the subprogra m is called in line 850 and perf orm ed in lines 3670 - 3780 ). If an error h as occurred, a m essage will be sent to the output devi ce (CRT). After all outputs are t ested without errors, the CAL MODE will be tu[...]

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

A lig nment Procedures 95 Alignment Program 10 ! This program called "AL IGN_6626" w ill align 20 ! th e Agilen t6625A, 26, 28 an d 29A Power S upplies It 30 ! requi res an Agil ent3458A DMM and a four termin al 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 clea[...]

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 channel 560 Chan =1 ! Select channel to cal sink (-CC ) 570 Other_chan =2 ! Select curren t source channel 580 Get_data ! Cal l program with range dat a 590 Cal_si nk(Irng _ hi,1)[...]

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

Alignment P rocedures 98 Alignment Program (continued) 1570 PRINT "Press CONTINUE w hen ready 1580 PAUSE 1590 Output_on 1600 ! 1610 Cal_v: ! 1620 Clear_screen 1630 PRINT " Cali brati n g th e";V _range;" volt ra nge pro gr ammi ng” 1640 ! 1650 OUT PUT @Ps; "VRSET" ;Cha n,V_rang e ! Set voltag e range 1660 ! 1670 OUT [...]

A lig nment Procedures 99 Alignment Program (continued) 2090 ! 2100 ! 2110 Cal_curren t: SUB C al_curren t(I_range) ! Subprogram t o cal current 2120 COM /Ps/ Ch an,Other_chan,@ Ps,Model$[7] 2130 ! 2140 IF I_range= .5 THEN GOTO Cal _i ! Skip s etup in structi ons 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_range) ! Read low output curren t 2620 ! 2630 OUTPUT @Ps;"IRHI";Ch an ! Set high readback curren t 2640 REPEAT ! Wait for su pply to finish 2650 UNTIL BIT(SPOL L(@Ps),4) ! Fini shed when Bit 4 goes true 2660 Irhi=FNDci(I_ran ge) ! Read high ou tput curren t 2670 ! 2[...]

A lig nment Procedures 101 Alignment Program (continued) 3130 PRINT "Calibratin g outpu t";Chan ;"";I_range;"A cu rrent sink readback" 3140 ! 3150 OUTPUT @Ps;"IRSET";Ch an,I_rang e;";IRSET";Oth er chan,I_ran ge 3160 ! Set I rang e for source and 3170 ! sink range 3180 OUT P UT @Ps; “ISET”;Other_[...]

Alignment P rocedures 102 Alignment Program (continued) 3650 ! 3660 ! 3670 Check _error:SUB Ch eck_error ! Subprog ram to ch eck for errors 3680 COM /Ps/ Chan,Oth er_chan,@Ps,Model$[7] 3690 Clear_screen 3700 PRINT “Checking for errors” 3710 OUT PUT @Ps; ”ERR?” ! Query supply for errors 3720 ENT ER @Ps; Err ! Enter th e error num ber 3730 IF[...]

Programming w ith a Series 200/3 00 Computer 103 B Programming With a Series 200/300 Computer Introduction The purpose of thi s appendix is to s erve as an in troducti on to programm ing y our power su pply wi th an HP S eries 200/300 computer using the BASIC langu age. Examples are included that employ some of the m ost frequently used functions. [...]

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 values in the dev ice commands. This is useful in applications that require changing the voltage and current values to differen t 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 SETTING OF OUTP UT #1 = ";Vsl 70 PRINT "CURRENT LIMIT SETTING OF OUTP UT #1 = ";Isl 80 END Line 10: Assigns th e I/O pathnam e to t[...]

Programming with a Series 200/300 Computer 106 Service Reque st and Serial Poll The fault and mask reg isters, when used in conjunction with the service requ est 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 re[...]

Programming w ith a Series 200/3 00 Computer 107 Error Det ection The power su pply can recognize programm ing errors and can inform you wh en a programmin g error occurs. When a n error is detected, no atte mpt is made to execute the co mmand. Instead, a bit in the serial po ll register is set. If SRQ2 or SRQ3 is set, an interrupt will be ge nerat[...]

Programming with a Series 200/300 Computer 108 LINE 10: Assigns the I/ O path n ame to th e power supply . LINE 20: Declares a common block f or the I/O path name. LINE 30: Def ines int errupt on s oftkey depress ion and branch to error routin e. LINE 40: Idles o n soft key definition. LINE 80: Def ines su bprogram Err _ trap LINE 90: Disables inte[...]

Command Summary 109 C Command Summary Introduction For conveni ence, a “quick reference” listing tabulating general command headers, and calibration command headers is shown at the beginnin g of Table C- 1 (page 110). (Note t hat calibrat ion comm ands are described i n detail i n Appendi x 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? < c[...]

Command Summary 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) repres ents t he sum of the bin ary weight s of th e ASTS regi ster bits (s ee page 77). T he ASTS register is a utomatically set to the pr esen t status after being queried. CL[...]

Command Summary 112 Table C-2 Command Summar y (continued) ID? Queries the iden tification ( model number) of t he supply . (see page 82). IDATA < ch >, < Ilo > , < Ih i > Sends data to calibrate th e current setting circuits of the specified ou tput < ch >. Ilo an d Ihi are measured values which the supply uses to calculate[...]

Command Summary 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 > E nables 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 gen erating SRQ. Setting < x > can be a 0, 1, 2, or 3 as describe d on page 79. SRQ? Queri[...]

Command Summary 115 Table C-2 Command Summar y (continued) VMUX? < ch > , < x > Queries t he measure ment of the i nput < x > to t he analog multiplexer o n the specified output < ch > (see Appendix A). VOUT? < ch > Queries the measured outpu t voltage of the specifi ed 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 messages that can be displayed on the power su pply’ s front panel. A brief explanation of each code and message is also given. The error codes and/or messages fall i nto three [...]

Error Codes and M essages 118 Table D-2. ERROR Respons es (continued) Error Cod e (ERR? query) Message (ERR key) Explanation 3 INVALID STR You sent a command the supply does not understand. Resend recognizable comm and. 4 SYNTAX ERROR You se nt a comman d with im proper syn tax. Check syntax of your command (see Chapter 5). 5 NUMBE R R ANGE An o ut[...]

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

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Manual Backdating 121 E Manual Backdating Introduction The backd a ting i nformation in t his chapter applies to units that ha ve the follo wing serial numbers: Agilent Model 6625A. s erials 2831A -00101 to 00663 Agilent Model 6626A, s erials 2831A -00101 to 00823 Agilent Model 6628A, s erials 2922A -00101 to 00232 Agilent Model 6629A, s erials 292[...]

Agilent Sales and Support Office 122 A gilent Sales and Support Office For more in formation abo ut Agile nt Technologies test and m easurement produ cts, appli cations, s ervices, and fo r a curre nt sales office listi ng, visit our web site: htt p://www.agilent.c om/find/tmdir You can also contact on e of the follow i ng cent ers and ask for a t [...]

123 Manual Updates T he foll o w i n g updates h a ve bee n mad e to thi s m a nu a l s i nce the print revisio n i ndicated on the title p a ge. 2/01/00 A ll r e ferenc e s to HP have been ch a nged to Agil e nt. All r e fere nc e s to H P -I B have b e en c ha n ged to G P I B .[...]