Agilent Technologies 6623A manual

OPERATING MANUAL MULTIPLE OUTPUT LINE AR SYSTEM DC POWER SUPPLIES Agilent MODELS 6621A , 6622 A, 6623A , 6624A, and 6627A A gilent Part No 5957-637 7 Agilent M odel 6621A, Serial s 3213 A-01681 and A bove * Agilent M odel 6622A, Serial s 3210 A-02091 and A bove * Agilent M odel 6623A, Serial s 3209 A-02231 and A bove * Agilent M odel 6624A, Serial [...]

2 CERTIFICATION Agilent Technologies certifies that this pr oduct met its published specifications at time of shipment from the factory. A gilent Technologies further cer tifies that its calibration measurements are traceable to the United States National Bur eau of Standards, to the extent allowed by the Bureau’ s calibration facility, an d to t[...]

3 SAFETY SUMMARY The followi ng general safety pr ecautions must be obser ved duri ng all pha ses of operation , service, and repair of this instrument. F ailure t o comply wi th these pre cautions or with specific warnin gs elsewhere in this manu al violates safet y standards of des ign, m anufacture, and i ntended us e of the instr ument. A gilen[...]

4 SAFETY SUMM A RY (continued) GENERAL Any LEDs use d in this pr oduct a re Cla ss 1 LED s as pe r IEC 825-1. ENVIRONMENTAL CONDITI ONS This ins trument is intended for ind oor use i n an ins tallation c ateg ory II , pollution degre e 2 envir onment. It is desi gned to operate a t a max imum relativ e humidity of 95% and at altit udes of up to 200[...]

5 DECLARATION OF CONFORMITY according to ISO/IEC Guide 22 an d EN 45014 Manufa cture r’ s Name: Agilent T echno logies Manufactu rer’ s Addres s: 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 This is the Operating manual for the Agilent 6621A through 6624A and 6627A Series of Multiple Outpu t Linear System Power Supplies. It contai ns i nformation relating to the i nstallation, ope ratio n, and programming of these supplies as outlined belo w. Maintena nce and troublesho o ting instr uctio ns are given i n a [...]

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

8 Table Of Contents (co nti nue d) Positive and Negative Voltag es.............. ............................................................................... .................... 49 Remote Voltage Sensing............ ......... .......................................................................................................... 49 Remote Sen[...]

9 Table Of Contents (co nti nue d) Setting Voltage............... .................. ........................................................................... .............................. 84 Setting Current .......................... ................................................................................................................[...]

General Information 11 1 General Information Introduction This chapter contains a general description of your power supply, as well as its perform ance specifications. Information about options, acces sories, and GP-IB cables is also provided. This manu al describes all five models in th e Agilent 6621A- 6624A, an d 6627A pow er supply family . Unl[...]

General Inf or mation 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 ft) 10833D GP-IB ca ble, 0.5 m (1.6 f t) 10834A GP- IB connect or extender Slide m ount kit (1494-0059) Description The Agilent 6621A- 6624A, and 6627A Multiple Output Linear Power Su pplies feature a combination o[...]

General Information 13 Programm able delay time for s ervice request and OCP mask . Voltage, current, and o vervolta ge calibration. GP-IB interface selftest. Message disp lay capability on the fro nt panel. Output connect io ns are made to rear panel scre w terminals. Either the positive or ne gative output ter minal can be grounded , or the out p[...]

General Inf or mation 14 The pow er supply has no poten tiometers. Each output i s individu ally cali brated over th e GP-IB using calibration commands (see Appendix A). Correctio n factor s are calcula ted by the po wer suppl y during calibratio n and are stored in a non -volatile memory which is located on the su pply’ s GP-IB board. The supply[...]

General Information 15 Speci fications Table 1-2 li sts th e performance specif ications for th e Agilent 662xA pow er supplies . Perform ance specificati ons describe the instrument’ s warranted perform ance. The service manual, Option 9l0, cont ains procedures for verify ing the performance specifications. Table 1-3 li sts th e supplemental ch [...]

General Inf or mation 16 Programmi ng resolution: A verage programming step size. Current Sinking ( - Current): Each output can si nk as well as so urce current. The sink in g capability is not p rogrammable and depe nd s upon the outp ut voltage. The current sinkin g cap ab ility is described in greater d etail in Chapter 4. Figure 1-3. Out put Re[...]

General Information 17 Table 1-2. Spe cifications PERFORMANCE SPECIFICATIONS (0 to 55 °C unless otherwise sp eci fied) Ou tputs: 40 W Lo w 40 W H igh 80 W Low 80 W High Voltage Voltag e Voltage V oltage DC Output Ranges: All outputs will accept voltage programming commands 1 % h i gh er than those listed and current programming command s 3% high e[...]

General Inf or mation 18 Table 1-3. Supplemental Ch aracteristics Ou tputs 40 W Lo w 40 W High 80 W Lo w 80 W High Voltage Voltag e Voltage Vol tage Temperature Coeffi ci e nt: Volta ge (60 ppm + 0.4 m V)/ °C (60 ppm + 1 m V)/ °C (60 ppm + 0.4 m V)/ °C (60 ppm + 1 m V)/ °C +Current (160 ppm +0.2mA)/°C (160 ppm +0.1 mA)/°C (160 ppm +0.4mA)/°C[...]

General Information 19 Table 1-3. Supplemental Ch aracteristics (continued) Output s 40 W Low 40 W High 80 W Low 80 W High Voltage Vol tage Voltage Voltage Programm ing Resolution : Voltag e 6 mV 15 m V 6 m V 15 m V +Current 25 m A 10 mA 50 mA 20 m A OVP 100 mV 250 mV 100 mV 250 mV Readback Resolution: Voltag e 6 mV 15 m V 6 mV 15 m V + or-Cu rrent[...]

General Inf or mation 20 Table 1-3. Supplemental Ch aracteristics (continued) Output Impe da nce: Approximated by a resistance in parallel with an inductance (see graphs in Figure 1-7). The valu es for each output are: 40 W Low Vol tage 40 W High Voltage 80 W L ow Voltage 80 W High Volt age 0.15 Ω , 2.0 µ H0 . 3 Ω , 5 µ H 0.15 Ω , 0. 8 µ H[...]

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

General Inf or mation 22 Figure 1-5. CC Operation w ith Inductive Load, Small Signal St ability Graph for HV (0 to 5 0 V) Outputs[...]

General Information 23 Figure 1-6. CC Operation w ith Inductive Load, Small Signal St ability Graph for L V (0 to 20 V) Outputs[...]

General Inf or mation 24 Figure 1-7. Output Impedance (Typ ical) Graphs (See Supplemental Characteri stics, Table 1-1)[...]

Installation 25 2 Installation Introduction This chapt er contains instructi ons for check ing and moun ting your pow er supply , connecting your su pply t o ac power, converting it f ro m one line voltage to another, and connecting the GP- IB cable. The pow er supply generates operat ing magn etic fields w hich may aff ect the operation of oth er [...]

Installation 26 Figure 2-1. Ou tline Diagram Input Power Requirements You can operate this power s upply from a nominal 100 V, 120 V, 220 V or 240 V singl e phase power source at 47 to 6 6 Hz. The input voltage rang e, maximum input curren t, high line inrush curren t (PK), and the fuse required f or each of the nomin al inputs are listed i n Table[...]

Installation 27 Figure 2-2. Rear Panel Detail (6624 A Shown) Table 2-2 Line Fuses Line Voltage Fuse Ne eded Agilent Part Number (for 1/4 X 1-1/4 in. fus es only) 100/120 V 8AM 2110-03 42 220/240 V 4AM 2110-00 55 Note Al l fuses are rated f or 250 V. Figure 2-3. Line M odule Detail GP-IB[...]

Installation 28 Power Cord The pow er supply is shipped f rom the f actory with a power cord th at has a pl ug appropriate f or you r location. F igure 2-4 shows the standard configuration of plugs used by Agilent Technologies. Belo w each drawing is the Agilent part number for the replacem ent power cord equipped w i th a plug of that configu rati[...]

Installation 29 FIRE HAZARD Make sure the replacement fuse is one of the same type (size) and rating (amps) that is consi stent wit h the vo ltage leve l you ar e ope r ating at. Do not use a substit ute fuse ; use a fu se with the same Agi lent Part nu mber list ed in Table 2-2. 6. Close t he door of th e line modu le and in sert the pow er cord i[...]

Getting Started 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 Cont rols and In dicators • 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 front p[...]

Getting Started 32 If you ha ve an y questi o ns conc erning i nstalla tio n or power req uirement s, revie w Chap ter 2. To turn on your sup p ly, press the front panel LINE switch. When the po wer is initially applied, the s upply performs a series of self tests which last about 3 seconds. Included in th ese tests are chec ks of circuits on the G[...]

Getting Started 33 Table 3-1. Controls and Indicato rs (continued) Number Controls/lndicators Description Page 3 OUTPUT Annunciato rs Indicate which output channel has been selected for fron t panel con trol and/or dis play. (Only on e output annun ciator can be on at a tim e.) 36, 37, 83, 83 4 Power Supply St atus Annunciato rs (These fi ve annunc[...]

Getting Started 34 Table 3-1. Controls and Indicato rs (continued) Number Controls/lndicators 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 outpu t channels for local control or d isplay. This key allo ws the cha n nels to be selected in forward ( Ï ) or rev erse ( Ð ) [...]

Getting Started 35 Table 3-1. Controls and Indicato rs (continued) Number Controls/lndicators Description Page 8 Numeric Entry Keys (These keys are used in conj unction with ma ny o f the System Control and Outp ut Control ke ys to enter the desired va lues in to the powe r supply . 0 to 9 - Set the value of the specified function and (e.g. VSET 16[...]

Getting Started 36 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 re main disab led (off) and the displa y 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. Er[...]

Getting Started 37 Voltage Test 1. Set th e voltage of th e selected ou tput to 10 V by pressing: VSET 1 0 ENTER 2. Check that the di splay reads approxim ately 10 V and 0 A and the C V annunciator i s on indicat ing th at the supply is in the constant voltage mode o f operation. Overvoltag e Test 1. Program the overvolt age protection (OVP) to 19 [...]

Getting Started 38 7. Set th e current to 0.5 A by pressing : ISET . 5 ENTER 8. Check th at the display reads approximately 0 V and 0.5 A. 9. Enable the overcu rrent protection circuit by pressing: OCP 10. Check that th e OCP ENB LD annunciator is on indicating that overcurrent protection is enabled and the display reads "OVERCURRENT". Wh[...]

Getting Started 39 OUTPUT The Agilent BASIC language statement that addresses the pow er supply to talk and reads back data f ro m the power supply is: ENTER The supply ’ s front pane l ADDR annunciat or is on when the supply is address ed to talk or to liste n. Reading the GP-IB Address Before y ou can operate y our power su pply rem otely, y ou[...]

Getting Started 40 Getting Data From The Supply The supply is capable of m easuring the val ues of its output p a ra meters in response to queries. In this ex ample, the query asks the supply to measure the ou tput voltage at output 1. When you send a query f ro m re mote, the supply does not display the response as it did when y ou executed the co[...]

Getting Started 41 To set the volta ge of output 1 to 5 volts, send: OUTPUT 705; "VSET 1,5" To set the current o f outpu t 2 to 450 milliamps, se nd: OUTPUT 705; "ISET 2,.450" Output Voltage and Cur rent Measurement . You can instruct the s up p ly to measure the actual o utput volta ge and current at a specified ou tput using t[...]

Getting Started 42 Overcurrent Protection . The output will go to the o ff state (0 vo lts and min. current) whe n the overcurrent protectio n (OCP) feature is enabled an d the output is in the + CC mode. To en able the overcurren t protection mode for outpu t 2, send: OUTPUT 705; "OCP 2,1" To disable th e overcurren t protection m ode fo[...]

Output Connections and Op erating Information 43 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 supp ly operates under[...]

Output C onnections an d Operating Inf ormation 44 Operating Quadrants Figure 4- 2 shows t he operatin g locus of y our power supply in three quadran ts. The area in qu adrant 1 sh ows the operati ng locus defined by th e volta ge and current settings of each output. The characteristics shown for quadran t 1 incorporate remote sensing and include t[...]

Output Connections and Op erating Information 45 Figure 4-2. Typical Output Range Ch aracteristics[...]

Output C onnections an d Operating Inf ormation 46 A fixed overv oltage threshold of approx imately 120% of th e maximum rated output voltag e is built into each output. Because the fixed overvoltage circuit is biased f rom the output terminals, it can be activated and provide protection even when the supply is n ot connected to the ac power line. [...]

Output Connections and Op erating Information 47 Figure 4-3 Typical Dow nprogramming Characteristic Below 2.0 V Wire Siz e Selection FIRE HAZARD Select a wire size large enough to carry short- circuit current without overheating. Two factors must be considered w hen selecting wire size for load connections: conductor tem perature and volt age drop.[...]

Output C onnections an d Operating Inf ormation 48 available in the load lead s for p rolonged op e ratio n into a 5 A load during ac low line at hi gh ambient temperature conditions. There is a similar stipulatio n for 80 W lo w voltage ou tputs at l0 A under the same conditions a s above. See Figure 4-2A for worst case volta ges available at the [...]

Output Connections and Op erating Information 49 Multiple Loads If you are using the as-ship p ed terminal block strapp ing pattern (local sensing) a nd are connecting multiple loads to one output, conn ect each load to the output terminals using separate connecting wires (see Figure 4-4). This minimizes mutual coupling effects and tak es full ad v[...]

Output C onnections an d Operating Inf ormation 50 regardles s of how the power s upply is programmed. Not e that wi th remote sensing, v oltage readback m onitors th e load voltage a t t he se nse point s. Figure 4-5. Remote Voltage Sen sing Figure 4-6. A llowable Load Le ad Voltage Drop with Remote Sensing The max imum voltage av ailable at the p[...]

Output Connections and Op erating Information 51 OU TPUT TY PE FO RM ULA (40 W & 80 W) LV Output CV Reg Error(mV) = Rs ( Vs et 45 Vdrop 1.1 - ) HV Output CV Reg Error(mV) = Rs ( Vs et 105 Vdro p 3.3 - ) CV Regulation Erro r = Re motely sensed volta ge will change b y this number of m illivol ts. Rs = Resistance of each sense lead in Ω . Vset [...]

Output C onnections an d Operating Inf ormation 52 Overvoltage Trigg er Connections Each output of your power supply has two OV terminals on its rear panel terminal block. These terminals are labeled +OV and -OV. By connecting th e OV terminals all in parallel as shown in Figu re 4-7, an overvolt age shutdown on any one output will also trigger the[...]

Output Connections and Op erating Information 53 Figure 4-8. External T rigger Circuit The internal equi vale nt OV circuit is sho wn in Figure 4-9. Note the i nternal D C blocking capacito r, b leed resistor and noise bypass capacitors. Do not exceed 50 volts maximum between the + OV and the - OV terminals. The OV terminals are rated at ± 240 Vdc[...]

Output C onnections an d Operating Inf ormation 54 Power Supply Protection Considerations Battery Charging If you are using you r supply i n a battery chargi ng application , it is recommen ded that a seri es protection diode be a dded to prevent damage to th e supply during an overvoltag e shutdown. Remember that each output has an overvoltage pro[...]

Output Connections and Op erating Information 55 CV Operation For CV operation, on e output m ust operate in CC mode and th e other output 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 ’ ’ contro lli ng" the volta ge regulat ion of b o th outp uts. [...]

Output C onnections an d Operating Inf ormation 56 CC Operation For CC operatio n, set the output vo ltages as outlined in CV operatio n (p age 55), or alternativel y, p rogram 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 oper[...]

Output Connections and Op erating Information 57 Series Operation SHOCK HAZ ARD Floating voltages must not exceed 240 Vdc. N o output terminal m ay be more than 240 Vdc f rom chassis g round. 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 ter[...]

Output C onnections an d Operating Inf ormation 58 CC Operation For CC operation, th e current setting of each output must be programmed to the desired operatin g current . The sum of the voltage setti ngs deter mines the voltage limit p o int. As an exa mple, one way to pro gram the voltage o f the output is to set the voltage o f each output to o[...]

Output Connections and Op erating Information 59 Voltage All series specifications referring to voltage are twice the single outpu t specification except for programming resolutio n which i s the same as for a single o utput. Current A ll series speci ficatio ns referring to current are the same as for a single outpu t except for CC load effect, CC[...]

Remote Operation 61 5 Remote Operation Introduction Chapter 3 i ntroduced y ou to the basi cs of remote operati on and provided a f ew sim ple examples using a Series 200 computer as the GP-IB controller. This chapter contains all the information requ ired to control your power su pply remotely and discusses in greater detail how each of the comman[...]

Remote Operation 62 The SRQ ann unciator on the fron t panel dis play is tu rned on w hen the power su pply i s requesting service from th e computer and remains o n until the controller conduct s a serial poll. A serial poll re moves the service request and tur ns of f the SRQ annuncia tor regardless of whether the cond ition that caused the servi[...]

Remote Operation 63 Power-On S ervice Request ( PON) The power supply can request service f rom the controller when the pow er is turned on. This request can be en abled or disabled by sending a PON comman d (see page 77). When the requ est is e nabled, the supply can generate an SRQ at power-on or when there is a momentary loss in power. You can e[...]

Remote Operation 64 Figure 5-2 (Sheet 1 of 2). Syntax Fo rms for Power Supply Command s[...]

Remote Operation 65 Figure 5-2 (Sheet 2 of 2). Syntax Forms for Power Supply Commands[...]

Remote Operation 66 Table 5-1. Power Supply Command s Command Header *Output Channel Data Range Syntax (Fig. 5-2) Set Voltage VSET 1,2,3,4 See Table 5-4 C4 Set Current ISET 1,2,3,4 See Table 5- 4 C4 Set Overvo ltage OVSET 1,2,3, 4 See Table 5-4 C4 OC Protectio n On/Off OCP 1,2,3,4 0,1(of f,on ) C4 Output On/Off OUT 1,2,3,4 0,1(of f,on) C4 Set the S[...]

Remote Operation 67 NOTES: 1. Output ch annels 3 and 4 are not used in all models. (See Table 5-4). 2. Appli es to 80 W Low V o utput. 3. Applie s to 40 W High V and 80 W High V outputs. 4. ’ ’ X ’ ’ depends upon model. 5. A space is returned for a + sign . 6. All responses are followed by a < CR > and < LF > (EOI asserted with [...]

Remote Operation 68 The output voltage of some outpu t channels exceeds the safe operating limit of 42.2 V. To avoid any electrical shock, program th e voltage to zero volts or turn off ac input pow er before changing any rear panel connections . Make certain all straps are properly connected, terminal block scre ws are securely tigh tened and term[...]

Remote Operation 69 IOUT? 1 The results are placed on the GP-IB and read in to the controller . Table 5-4. Programmable Output Ranges for the Agilent 662l A -6624 A and 6627A Supplies Model Output Channel Operating Range * Output Voltage (A vg. Resolution) Output Current-( Avg. Resolution) ** Overv oltage Range( A v g. Resolution 6621A 1 & 2 Lo[...]

Remote Operation 70 Range Switching Each outpu t operates in the boundaries of either t he low range or th e high range as specified in Table 5- 4. Refer to pag e 43 for a detail ed description of the du al range operation . The range is s elected based on th e programmed param eters. If the last parameter (voltage or current) p r o grammed is outs[...]

Remote Operation 71 Overvoltag e (OV) Prot ection The programmable OV is a protection feature which can be set by the operator to protect th e load against excessive voltage. When the actual voltage exceeds the programm ed overvoltage setting for a given output channel, the OV is tripped. The OV circuit will fire the SCR crow bar which shorts acros[...]

Remote Operation 72 Multiple Output Storage & Recall The power supply has 10 internal registers each of which can store the v oltage and current settings of all the outputs. By storing vo lta ge and current setti ngs for all output s and recalling the m later, you can have si gnificant savi ngs in programm ing time. (See Su pplemental Character[...]

Remote Operation 73 Figure 5-3. Functional Relationship of Status Registers The supply has one serial pol l register wh ich servi ces all outpu ts and provi des the user w ith othe r power supply status- related in formati on as discu ssed on page 75. Status Regist er . Each output cha nnel of the po wer supply maintains its pr esent status i n an [...]

Remote Operation 74 To query an output cha nnel for its status, you must specify the output c hannel. For example, to fi nd out the status at outp ut 2 send t he follow ing query and addres s the su pply t o talk: STS? 2 Accumulated Status Register . Each output chan nel of the power suppl y also maintain s a cumulative status i n its accumulated s[...]

Remote Operation 75 As shown in Fi gure 5 -3, if one or more bits in the fault re gister of a give n o utput chan nel are set, the n the FAU bit for that output in the serial p oll register will also be set and a service request may be ge nerated (see page 76) . To read the fault regist er of out put 2 and find ou t which bit s are set, s end the f[...]

Remote Operation 76 To find out the n ature of the service request, you must do a serial poll. This w ill isolate the output that generated the reque st by checking which of the FAU bits are set in the case of a fault, or checking to see if th e error bit is set in the case of an error. If the SRQ on faults was set, the n send the fault q uery. FAU[...]

Remote Operation 77 If you want to d isab le this facility, se nd the comma nd . PON 0 If you want to fin d out if the power-on SRQ is enabl ed or disabled, s end the f ollowing query : PON ? and address the s upply to talk. The suppl y will respond with a 1 or 0 as discussed above. NOTE The pow er-on (PON) SRQ m ode is stored in the non- volatile [...]

Remote Operation 78 and address the s upply to talk. The response will be a numeric value between 0 and 3 2 . Display On/Off When the display is on, th e commands sent across the GP-IB may experience a slower processing time because the processor mu st also spen d time to mon itor the outpu ts and update the di splay. You can sh orten y our co mman[...]

Remote Operation 79 the tes t query are described in Table 5-9. This test cann ot be done from the front pan el. To instru ct the power su pply to carry out a self-test, send the follo wing query and address the s upply to talk: TES T? Calibration M ode Query . To be able to calibrate your power supply, the calibration mod e (CMODE) must be turned [...]

Remote Operation 80 Table 5-8. E rror M essages Front Panel Response GP-IB Code Explanation . NO ERROR 0 This is t he response to th e ERR? query when there are n o errors. INVALID CHAR 1 You sent the supply a character it did not recogn ize. INVALID NUM 2 F ormat of your num ber is incorrect. Check number syn tax. INVALID STR 3 or 28 Occurs when y[...]

Remote Operation 81 Table 5-8. E rror Messages ( continued) Front Panel Response GP-IB Code Explanation CAL LOCKED 18 Calibration was atte mpted with the Calibration J umper on the GP-IB bo a rd in the lockout po sition. Reposition j umper if desired. See Service Manual. SKIP SLF TST 22 The self test jumper on the GP-IB board is in the Skip Self Te[...]

Local Operation 83 6 Local Operation Introduction Chapt er 3 intr oduced you to the supply ’ s front pan el control s and indi cators to h elp you turn on the supply a nd perf orm th e checkout procedures that were g iven in that chapter. The following paragraphs describe how to use all of the front panel controls and indicat ors. Most of th e re[...]

Local Operation 84 Figure 6-1. Front P anel (Model 6624A s hown) 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 85 Enabling/Disabling an Output The selected output channel can be tu rned on and off from the front panel. The OUTP UT ON/OFF ke y toggles t he selected outpu t on and off . When an output is t urned off , the messag e ’ ’ DISABLED" will be display ed. The OUTPUT ON/OFF ke y will not affect any other p r o grammed function[...]

Local Operation 86 Table 6-1. Bit Arrangement of the St atus, M ask, and Fault Registers Bit Position 76543210 Bit Weight 1 2 8 6 4 3 2 1 6 8421 Condition CP OC UNR OT OV -CC +CC CV Note that bits can be set in an output’ s fault register only when there is a change in either the status register or the mask register. Therefore, if a bit is set in[...]

Local Operation 87 The supply’ s present address w ill appear in th e display . Address 5 is th e factory set addres s. If you want to leav e the address set at 5, you can return to the metering m ode b y pressing the METER key or you can press anothe r func tio n ke y. If you want to ch ange the address, you can enter a new value. Any int eger f[...]

Calibration Pro c edu res 89 A Calibration Procedures Introduction T his appendix discuss e s the so f t w are calibration pro ced ures for the p o w er supp l y . T hese supplies sh o u ld be calibrated annually o r w h e nev er certain repairs are m ade (see Se r vice Manual). Because there are no internal or ex tern a l har d w are adjust m e nt[...]

Calibration Pr o cedures 90 Figure A-1. Calib ration Setup[...]

Calibration Proc edu res 91 Table A-1. Calibration Commands Command Heade r Channel* Range Data Syntax (see Figure 5-2) Calibrati on Mode CMODE 0,1 (of f,on) C2 Set High Vol tage VHI 1,2,3, 4 - C3 Set Low Voltage VLO 1,2,3,4 - C3 Set High Curren t IHI 1,2,3,4 - C3 Set Low Current IL O 1,2,3,4 - C3 Calibrate Overvo ltage OVCAL 1,2 ,3,4 - C3 Voltage [...]

Calibration Pr o cedures 92 Start with output c hannel 1 and use the follo wing com mands to calibrate your power suppl y: NOTE Do n ot turn the power supply off during th e calibration procedures. Otherwise, th e correction constants are not stored. Exercise care wh en moving the leads. 1. CMODE < param > - This comm and turns the calibratio[...]

Calibration Pro c edu res 93 Repeat c o mm a n ds t w o t h rou gh eig h t f or an y ot h er o u t p u ts t h at m ust be calibrate d o n y o u r p o w er s u ppl y . A fte r y o u h a v e co m pleted calibratio n o f all outputs, tu r n t he calibratio n m ode of f b y s e ndin g t he CM O DE0 comm a nd (see step 1) to the p o w er suppl y . T he [...]

Calibration Pr o cedures 94 470 ! 480 IF FNPs _ err < >0 THEN Fin ish 490 ! 500 OUTPUT @Ps;"VSET ";Chan,"0 ;ISET ’ ’ ;Chan,"0" 510 ! 520 INPUT "ANY MORE OUTP UTS TO CALIBRATE? (Y OR N)",X$ 530 IF (X$=’ ’ Y" OR X$=’ ’ y") THEN Start_loop 540 ! 550 OUTPUT @Ps;"CMODE 0" 560 ! 570[...]

Calibration Proc edu res 95 LINE 370,380: Prom pts the user t o make current calibration conn ections and wait s for CONTINUE key to be pres sed. LINE 400: S ets th e current of th e specifi ed output t o the high cal ibration poin t. LINE 410: Se ts the variabl e Ihi to th e output current as measured by th e voltmeter acros s the shun t resistor.[...]

Programm ing w ith a Series 200/300 Compu ter 97 B Programming With a Series 200/300 Computer Introduction The purpose of this appendix i s to serve as an i ntroduct ion to programm ing your pow er supply with an HP Series 200/ 300 computer using the BASIC langu age. Examples are included that employ some of the most frequ ently used functions. The[...]

Programm ing with a Series 200/300 C omput er 98 Voltage and Curr ent Programming With Variables You can use variables in a prog ram to represent data values in the dev ice commands. T his is usef ul in applications that require changing the voltage and current values to different predeterm ined settings. The follo wing program uses a variable in a[...]

Programm ing w ith a Series 200/300 Compu ter 99 10 ASS IGN @Ps TO 705 20 OUTPUT @Ps; "VSET?1’ ’ 30 ENTER @Ps; Vsl 40 OUTPUT @Ps;’ ’ I SET? 1" 50 ENTER @ Ps;Isl 60 PRINT ’ ’ VO LTAGE SETTING OF OUTP UT #1 = ’ ’ ;Vsl 70 PRINT ’ ’ C URRENT LIMIT SETTING OF OUTP UT #1 = ";Is1 80 END Line 10: Assigns th e I/O pathn am[...]

Programm ing with a Series 200/300 C omput er 100 10 ASS IGN @Ps TO 705 20 COM /Ps/ @Ps 30 OUTPUT @Ps;’ ’ CL R;UNM ASK1,8;UNMASK2,8;SRQ1 ’ ’ 40 ON INTR 7,1 CA LL Err _ trap 50 ENABLE INTR 7; 2 60 OUTPUT @Ps;"OVSET1,4;0VSE T2,4" 70 OUTPUT @Ps;"VSET1,5;VSET2,5" 80 Lbl: GOTO Lbl 90 END 100 ! 110 ! 120 SUB Err _ t rap 130 OF[...]

Programm ing w ith a Series 200/300 Compu ter 101 Error Det ection The power su pply can recogn ize programming errors and can inform you when a programm ing error occurs. Wh en an 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[...]

Programm ing with a Series 200/300 C omput er 102 LINE 10: Ass igns the I/O path name to th e power supply . LINE 20: Declare a comm on block for the I/O path name. LINE 30: Def ine interrupt on softkey depress ion and branch to error routi ne. LINE 40: Idle on so ftke y definitio n. LINE 80: Def ine subprogram Err_trap LINE 90: Disable interrupt c[...]

Programm ing w ith a Series 200/300 Compu ter 103 CC Operation Programming for CC operation is straightforward. Prog ram each output to th e desired voltage limit point. Then prog ram each output to supply half of the total desired operating current. Both outputs will operate in CC mode. Note th at the total desired current cannot exceed the com bi[...]

Programm ing with a Series 200/300 C omput er 104 LINE 10: As signs the I/ O pathnam e to the pow er supply . LINE 20,30 : Enter the operating volta ge and current li mit po int. LINE 40: S ets C equ al to one half of the cu rrent limit point. LINE 50-70: Determines the voltage s etting for out put 2. It is 20.2 V w hen th e operating v oltage is g[...]

Comm a nd Summary 105 C Command Summary Introduction Table C-1 pr ovides an al phabetical list ing and a brief description of each command th at can be sent t o the Ag ilent 6621A- 24A, and 6627A po we r supplies . All of the comman ds can be executed rem otely ov er the GP-IB. Many of the commands can also be executed locally from the supply’ s [...]

Comma nd Su mmar y 106 Table C-l. Command Summar y (continued) Command Description DSP? Queries the present status of the display (see page 78). R esponse is either a 1 (on) or a 0 (off ). DSP " xxxxxxxxx xxx” Puts t he quoted s tring on t he power su pply's fron t panel dis play (see page 79). Only numerals, upper case letters, an d sp[...]

Comm a nd Summary 107 Table C-l. Command Summar y (continued) Command Description OCP? < ch > Queries the overcurrent protection circuit on/off status for the specified outpu t channel (see pag e 72). Response is either a 1 (on) or a 0 (off ). The OCP ENBLD annunci ator on th e front panel displays th e on/off st atus of the OCP circui t for [...]

Comma nd Su mmar y 108 Table C-l. Command Summar y (continued) Command Description SRQ? Queries the present setting of the reasons for issuing an SRQ (see page 76). Respon se is 0, 1, 2, or 3 that corresponds w ith th e SRQ <setting > described previou sly. *STO < reg > Stores the present vo ltage and current setti ngs for all output ch[...]

Error Codes and Messag es 109 D Error Codes and Messages Introduction This appendix describes the GP-IB error codes that can be readback to the controller an d the error messages that can be displayed on the power su pply’ s fro nt panel. A brief explanation of each code and m essa ge is also given. The error codes and/or messages fall i nto thre[...]

Error Codes and Mes sages 110 Table D-2. ER ROR Responses Error Cod e (ERR? query) Message (ERR key) Explanation 0 NO ERROR In dicates there are no errors. 1 INVALID CHAR You sent the supply a character it did not recognize. 2 INVALID NUM The format of y our number is incorrect. Check syntax (see Chapter 5). 3 or 28 INVALID STR You sent a comm and [...]

Error Codes and Messag es 111 Table D-2. ERROR Respons es (continued) Error Cod e (ERR? query) Message (ERR key) Explanation 17 UNCALIBR AT ED Unexplained EEP ROM error; possibly as the result of incorrect calibration procedure. Recali brate as described in Appen dix A. If th e problem pers ists, a hardware failure exists (Re fer to the Tro ublesho[...]

Manual Backdating 113 E Manual Backdating Introduction The backd a ting i nformation in t his section applies to units that ha ve the follo wing serial numbers: Agilent Model 6621A s erials 2611A -00101 to 0168 0 Agilent Model 6622A s erials 2611A -00101 to 0209 0 Agilent Model 6623A s erials 2611A -00101 to 0223 0 Agilent Model 6624A s erials 2550[...]

Addendum 114 ADDENDUM I. Generally Applicable Annotations Consistent with g ood engineering practice, leads attach ed to customer accessi ble signal/monitoring ports (su ch as the l0- pin Control Connector, t he 7-pin Analog Connect or, the 7-pin Digital Port/Trigge r Connector, s crew terminal Barrier Blocks, etc.) shou ld be twisted and shielded [...]

Ag ilent Sales and Support Of fice 115 A gilent Sales and Support Office For more in formatio n about A gilent Technologies test and m easurement product s, applica tions, serv ices, an d for 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 fo llowing centers and ask for a t [...]

116 Manual Updates The follo w ing updates ha ve been made to this manua l since the prin t revis ion indicated o n the title p a ge. 2/01/00 All references to HP have b een changed to Agile nt. All re fe rence s to HP -IB ha ve bee n chan ged to G PIB .[...]