HP 6177B User Manual Download

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Summary of Contents for 6177B

Page 1: ..._0 PER AT N G AND S E R V ICE MAN U A L DC POWER SUPPLY CCB SERIES MODEL 6177B HEWLETTJl iPACKARD ...

Page 2: ...VICE MANUAL FOR SERIALS 9C0191 0215 For Serials Below 9C0191 Refer to Appendix A Manual Backdating Changes For serials above 9C0215 a Change Page may be in cluded 100 Locust Avenue Berkeley Heights New Jersey 07922 HP Part No 06177 90002 Printed August 1969 i ...

Page 3: ...E 3 The serial number prefix of the instrument has been change from OB to OJ In the Replaceable Parts Table and on the schematic diagram make the following changes R70 Change to 270n W HP Part No 0686 2715 CR25 CR26 CR33 Change to HP Part No 1901 0642 R50 Add lOOn l 8W HP Part No 0757 0401 connected between OUT and the junction of CR25 anode CR26 cathode and Ql9A base In the Replaceable Parts Tabl...

Page 4: ...top bottom and side surfaces Option X95 designates use of the former color scheme of light gray and blue gray Option ASS designates use of a light gray front panel and olive gray for the re maining surfaces New Part Numbers are shown below I I DESCRIPTION I STANDARD Front Panel Complete 06177 60002 Front Panel Top Insert 06177 60006 Front Panel Bottom Insert 06177 60004 Heat Sink Rear PaDel 5020 8...

Page 5: ...tput voltage is measur ed in only one range 1 6 The power supply has both front and rear ter minals Either the positive or negative output ter minal may be grounded or the power supply can be operated floating at up to a maximum of 300 Volts off grou Od added safety precautions should be 1 1 taken to protect the operator when the supply is used in this mode 1 7 Terminals at the rear of the unit al...

Page 6: ...a 1 number prefix which consists of a number l etter combination that denotes the date of a Sig nificant design change The number designates the year and the letter A through L designates the month January through December respectively with 1 omitted The third part is the instrument serial number 1 16 If the serial number prefix on your unit does not agree with the prefix on the title page of this...

Page 7: ... the chassis through a separate ground ter 500 40 cA 250 cA minal located on the front paneL 50 4 cA 40 cA PROGRAMMING SPEED Less than SOO lsec are required to program from 5 o 4 cA 5 cA zero and to 99 of the maximum rated output cur rent 0 each range or between the maximum rated output current of each range to within 1 of zero TEMPERATURE RANGES Operating oto 5SoC Storage 40 to 85 0 C REMOTE PROG...

Page 8: ...t is necessary only to connect the in strument to a source of power and it is ready for operation 2 9 LOCATION 2 10 This instrument is air cooled Sufficient space should be allotted so that a free flow of coolin air can reach the sides and rear of the in strument when it is in operation It should be used in an area where the ambient temperature does not xceed 50 C 2 11 OUTLINE DIAGRAM 2 12 Figure ...

Page 9: ...lace cover and operate unit normally 2 20 POWER CABLE 2 21 To protect operating personnel the National Electrical Manufacturers Association NEMA rec ommends that the instrument panel and cabinet be grounded This instrument is equipped with a three conductor power cable The third conductor is the ground conductor and when the cable is plugged into an appropriate receptacle the instru ment is ground...

Page 10: ... until front panel meter 4 indicates desired output voltage no load connected c VOLTAGE UMIT lamp 5 sho uld be on with no load connected d To select constant current output tum off supply and short and output terminals front 3 1 or rear e Set switch 1 to AMPS and select de sired output current range with range switch 6 Adjust CURRENT control 7 for desired output cur rent Remove short and connect l...

Page 11: ...po tionately Vrllen this occurs the VOLTJ GE LHv1IT lamp on the front panel will light In setting the voltage limi allowance must be made fo high peak voltages which can cause unwanted crossover Refer to Paragraph 3 34 1 NOTE A ihen the unit is operating in the vo It age limit mode LIMIT lamp on the front pane 1 ammeter indicates the pro grammed output current rather than the actuai output current...

Page 12: ... switch should be used s ince the out put current will exceed the maximum rating of the power supply if the switch contacts open during the switching interval 3 3 CAUTION If the programming terminals AD and AI should open at any time in the re mote programming mode the output current will rise to a value that may damage the power supply and or the load A protection resistor 2Kn Model 6177E or 5Kn ...

Page 13: ...nt panel VOLTAGE con trol is disconnected by the foliowing procedure s 3 26 Resistance Prooramminc Figure 3 5 The voltage limit of the supply is determined by the programming coefficient 870 per Volt for Model 6177B or 435 n per Volt for Model 6IBIE The volt age programming current is 1 15mA Model 61778 or 2 3mA Model 6I8lB and is factory adjusted to within 20 Adjustment of the programming ac cura...

Page 14: ...nt level of lOOmA by 100 In this case the output urrent would swing between 200mA and zero Am 3 5 peres The output current should never be allowed to swing beyond the rating of the supply SOOmA p p fo Model 61778 or 2S0mA p p for Model 61818 or clipping of the output and possible in ternal damage will result AO Ai A2 A3 j idJ 81 i i A4 A5 A6 Figure 3 8 External AC Modulation 3 33 The coupling capa...

Page 15: ...URRENT LOADING 3 41 k active load connected to the power supply 3 6 may actually deliver a reverse current to the power supply during c portion of its operating cycle An external source cannot be allowed to pump current into the supply without loss of regulation Diodes CR35 and CR36 connected in series with the neg ative output lead protect internal components from damage by blocking these reverse...

Page 16: ...res the voltage drop across the applicable current sampling resis tance with the potential of the guard supply The voltage drop across the sampling resistor s is pro portional to the output current and the potential of 4 1 the guard supply is proportional to the programmed outp lt current as will be explained in tI e next two paragraphs If a difference exists that is if the actual output current d...

Page 17: ...hen the supply is turned off 4 11 The H F amplifier improves the high frequency 4 2 gain of the unit This then helps to improve the transient response of the unit to both changing load conditions and ac modulation see Paragraph 3 31 4 12 The bleed circuit keeps the series regulator biased in its active region even at low output cur rent settings by providing a continuous path for current flow thro...

Page 18: ...sts of two sili con transistors housed in a single package The 4 3 transistors have matched characteristics minimiz ing differential voltages due to mismatched stages Moreover drift due to thermal differentials is mini mal since both transistors operate a essentially the same temperature Q22 acting as a constant cur rent source for the differential amplifier is used to bia s the emitters of both t...

Page 19: ...e that this 4 4 current aoes not go through the loae nor through the sampling resistors V Then the supply is programmed for zero current 20mA are flowing through the com mon node however zero current is actually deli vered to the load Keeping the series regulator biased in its active region at all times makes it possible to have good load regulation even at low output currents 4 44 VOLTAGE LIMIT C...

Page 20: ...r it should be understood tna the meter is now reading ten times the indicated value The re verse is true when switching to the next lower range 4 5 4 54 Notice that the ammete is connected from common to guard and the voltmeter from out to guard 5 explaIned previously the output terminal is kept at the same potential as the guard Th ls the ammeter is actually reading the voltage across the sampli...

Page 21: ... 1 Test Equipment Required REQUIRED RECOMMENDED TYPE CHARACTERISTICS USE MODEL Differential Sensitivity 1mV full scale Measure de voltages cali 3420 See Note Voltmeter min Input impedance 10 bration procedures megohms min Resolution I 1 ppm of range Variable Range 90 130 Volts Equip Vary ae input Voltage ped with voltmeter accurate Transformer within 1 Volt he Voltmeter Accuracy 2 Sensitivity Meas...

Page 22: ...portions of the test can be re eated either to check the OpE J aUon of the instrument after repairs or for periodic maintenance tests The tests are performed using a 11SVac 60Hz singie phase input power source If the correct result is not obtained for a particular checK do not adjust any controls proceed to troubleshooting Paragraph 5 38 5 7 CONSTANT CURRENT TESTS 8 For output current measurements...

Page 23: ...el Reading 61778 2 5 O 05Vdc 61818 1 Q 02Vdc If it does not refer to adjustment procedure at rear g To check the medium current range set the range switches on the front panel and the ex terna 1test setup to their middle position and dif ferential voltmeter to Rsz Then repeat Steps e and f Readings of Step f apply to every current range h To heck the low current range set both range switches to th...

Page 24: ... Adjust CURRENT control for maximum rated output current on front panel meter f Read and record voltage indicated on dif ferential voltmeter g Adjust auto transformer for 127Vac input h Reading on differential voltmeter should not vary from reading recorded in Step f by more 5 4 than the following Model No Vanatior f lVdc 6177B 25 61B1E 63 J To check line regulation for medium cur ren renge 5e bot...

Page 25: ...nal betvveen its two vertical input terminals thus ignoring the effects of any common mode signal introduced because of the dif ference in the ac potential between t je power sup ply case and scope case Before using a differen tial input scope in this manner however it is im perative that the common mode rejection capability of the scope be verified by shorting together its two l nput leads at the...

Page 26: ...ted relay as connected in the logd switching circuit of Figure 5 5 should be used for loading and unloading the supply Vlhen L 1is load switch is connected to a 60Hz ac input the mercury wetted relay will open and close 60 times per second Adjustment of the 25K control permits adjustment of the duty cycle of the load current switching and reduction in jitter of the os cilloscope display 5 28 To ch...

Page 27: ...amming Speed Test Setup 5 7 100 r I I OUT I o 100 200 300 400 500 tu EC Figure 5 8 Up Programming Speed Vvaveform 5 31 OUTPUT STABIIlTY Definition The change in output CUr rent for the first 8 hours follOWing a 30 minute warm up period During the interval of measurement all param eters such as load resistance ambient temperature and input line voltage are he 1d constant 5 32 The stability of the s...

Page 28: ...ymptom and probable couse 5 41 Tne scnematic diagram at the rear of the man ual Figure 7 3 contcins normal voltage readings taken at vaZ ious points within the circJits These voltages are positioned adjacent to the applicable test points identified by encircled numbers Com ponen anc te5 point deSignations are marked on the componen lo ation diagrams Figures 7 1 and 7 2 5 42 I a ciefective componen...

Page 29: ...ve Proceed to Paragraph 5 45 for further iso does not cOincide with front panel meter lation reading May be higher or lower I Inability to Zero Guard a C23 defective b R49 defective High Ripple a C29 or 020 leaky or defective b High ripple in reference circuit See Table 5 2 c Poor line regulation d Poor load regulation Poor Line Regula tion a Improper measurement technique See Paragraph 5 15 b Che...

Page 30: ...ect cause of trouble as described in Paragraph 5 44 and Table 5 2 round and replaced fe conduct the performance tests in Section V to ensure that no further trouble exists Note that sometimes it may be necessary to troubleshoot the instrument more than once be cause more than one circui has become defective The troubleshooting procedures shoule be repeated until all sources of trouble are located ...

Page 31: ...TIlt s ammeter readings Calculate actual output current and compare results with supply meter reading OBSERVATIONS AND CONCLUSICNS 1 If actual output current according to calculated values varies proportionally to programmed output according to unit s ammeter this indicates that the source of trouble is within the voltage limit circuit or overshoot control circuit Proceed to Table 5 7 2 If actual ...

Page 32: ...if max imurn rated output cannot be reached check 025 Q26 Q27 Q28 Oi9 Q30 and Q31 for open or similar defect Also check CH31 VR14 and VR15 for short Table 5 7 Isolation Voltage Limit Overshoot Contr l and Voltage Limit Circuit PURPOSE To isolate the voltage limit overshoot circuit PROCEDURE 1 With supply still connected as described in Table 5 5 procedure steps 1 2 3 and 4 reconnect VR4 2 Vary fro...

Page 33: ... and proceed to Step 5 5 Check tum on of 04 by opening a Output current rema ins low a 02 04 open R81 VR2 near the constant current shorted Open source strap between AS and A6 b Output current in crea s e s b VR2 shorted Check R5 and R6 for open Table 5 9 Troubleshooting the Guard Circuit STEP ACTION RESPONSE PROBABLE CAUSE PART A UNIT LOCKED UP 1 Check the operation of 22 by a Output current decr...

Page 34: ...ER ZERO 5 53 Proceed as follows to mechanically zero the meter a Turn off instrument after it has reached normal operating temperature and allow 30 seconds for all capacitors to discharge b Insert sharp pOinted object pen point or awl into the small indentation near top of round black plastic disc located directly below meter face c Rotate plastic disc clockwise cw until meter reads zero then rota...

Page 35: ...put voltage e Replace decade resistance with appropri ate value resistance in R6 position S 62 GUARD AMPLIFIER ZERO 5 63 T is adjustment minimizes the offset between the bases of the guard input amplifier Q18 The S 1S offset should be checked and acjusted if necessary wheneve Q18 is replaced Proceed as follows to perform this adjustment c Cor nec differential voltmeter between rear terrrnnals 1 an...

Page 36: ... or specie l modification J numbers of the instrument Hewlen Pac ard Je rt nUr 1ber circuit reference des ignato and description To order a part not listed in Table 6 give a complete description of the part its function and its location A B C CB CR DS Table 6 1 Reference Designators assembly E blower fan capacitor F circuit breaker J diode K device signal L ing lamp M miscellaneous electronic part...

Page 37: ...if TranSistor Electronics Corp Minneapolis Minn COD NC MANUFACTURER ADDRESS 07132 lNestinghouse Eiectric Corp Eiecr ronic Tube Div Elmira N Y 07263 Fairchild Camera and Instrument Corp Semiconductor Div 1v10untoin Vie Ca liz 07387 Birtcher Corp The Los Angeles Calif 07397 Sylvania Electric Prod Inc Sylvania electronic Systems Western Div Mountain Viev Calif 07716 IRC Div of TRvV Inc Burlington Pla...

Page 38: ... and Betts Co Union Carbide Corp Ward Leonard Electric Co Homer City Pa Phi lads lphia Pa New York N Y Mt Vern on J Y Use Code 71785 assigned to Cinch Mfg Co Chicago Ill 6 3 COLC NC 70363 70901 70903 71212 7127 71400 71450 71468 71590 71700 71707 7174 71785 7198 72136 72619 72699 72765 72962 72982 73096 73138 73168 73293 rvL UFACTURr R AD R SS AT Derite Co Inc Union Ci y K J Beemer Engr Co For vVa...

Page 39: ...x Corp Electric Power Div Eatontown N J 83330 Herman H Smith Inc B3385 Central Screw Co Brooklyn N Y Chicago Ill 83501 Gavitt Wire and Cable Div of Amerace Esna Corp Brookfield Mass 6 4 CODE NO 83503 83594 83835 83877 84171 84411 85684 86838 87034 87216 87585 87929 88140 88245 90634 90763 91345 91418 91506 91637 91662 919 29 92825 93332 93410 94144 94154 94222 95263 95354 95712 95987 96791 97464 9...

Page 40: ...ar 01 f 200Vdc fxd mylar 1 200Vdc fxd paper 0047 200V fxd mica 220p 500V fxd paper 033 1 200V fxd elect 47 1 35Vdc fxd mylar 1 200Vdc TO I 1 1 1 1 1 3 1 1 1 1 1 1 1 1 2 9 1 1 I 1 1 1 1 1 3 1 2 2 2 1 2 6177B 6 5 MFR PART NO Ale 2187D 312 001 KH 4147 EB 4735 33617A IN5059 2187D 40346 E8 1315 EB 6825 40D505Fl50DC4 150D475X9 03 5B2 150D686XOO15R2 30D206G050CC2 150D474X9035A2 811000V5U0103Z 150D474X903...

Page 41: ...4 50 52 65 67 69 82 84 NOT ASSIGNED R22 fxd comp 390 0 5 t W TO 1 3 3 15 4 1 2 3 8 2 2 2 2 1 1 1 1 1 1 1 1 1 1 2 1 3 3 4 2 2 2 6177B 6 6 I MFR PART NO RDM15Fl21J3C 150DI05X9035A2 IN4830 IN485B IN485B IN5059 IN4830 IN485B IN4830 IN485B IN5059 IN485B 56 590 68Al 3B 2N3391 2N2907A 40362 2N3391 2N4045 ZN3391 2N3391 2N2907A Type T 7A Type 7007 Type 7007 Type C42S Type CEA T O Type EB obd EB 2425 EB 753...

Page 42: ...Diode Zener 42 2V 400mW VR15 Diode Zener 20 5V 400mW ZI 2 Integrated Circuit Op Amplifier TQ 1 2 1 2 I I 1 1 1 I I 4 2 2 1 2 I 2 2 1 4 1 1 1 I 1 1 1 I 1 I 2 3 1 I I 1 1 I 2 6177B 6 7 MFR PART NO EB 2025 B 5105 B 2035 Type CEA T O B 1825 B 2725 EB 5625 Type CEA T O obd Type CEA T O Type 7007 Type C42S 8 8235 Type CE i T 9 Series 100 Type CEA T 9 EB 1525 EB 6225 EB I015 Type CEA T O Type CEA T 9 Ser...

Page 43: ... 02 Standoff Input P C Board ttt Hex Carton Pa eking End Caps Packing Filler Pad Packing OPTION 14 3 Digit Decadial Current Control 3 Digit Decadial Flat Washer Mod TO 1 1 1 1 1 1 1 2 2 1 1 1 1 4 1 4 2 2 2 2 2 1 1 1 2 2 4 1 4 3 6 6 3 2 1 1 1 1 1 1 3 1 1 6 2 2 1 1 2 1 2 1 MFR PART NO D 21BLK D 21MN D 21WTC DF21GNC 100350 332 14 05 034 H4001 342014 90312 901 2 422 13 11 013 133 98 92 061 1 RD411 1 6...

Page 44: ...ges have been affected to improve the opera tion of the supply In most cases when ordering new parts the components and part numbers list A I ed in Section VI of this manual should be used as a replacement for aDy defective part Vlhere ap plicable a separate change page is included with the manual which lists the most recent changes In t is case the component s listed on the change page should be ...

Page 45: ...d are a Component Location Diagrams Figures 7 1 and 7 2 which show the physica l location and reference designator of parts mounted on the printed wiring board b Schematic Diagram Figure 7 3 which illustrates the circuitry for the entire power supply Voltages are given adjacent to test points identified by encircled numbers on the schematic 7 1 ...

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