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Manual s/n prefix G604

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1. eee eee 5 10 LIST OF TABLES Number Page i IEN Specifications 6 9 9 9 9 9 6 P 8 amp 8 9 9 5 amp P 8 9 5 9 9 b 6 9 5 1 0 5 1 Recommended Test Equipment TT T 5 2 5 2 Trouble Location Chart NEN PITE TES 5 8 6 2 Reference Designator Index E 6 2 6 2 Replaceable Parts EE EN EE PE 6 5 APPENDICE Code List of Manufacturers Manual Changes Sales Office Locations pm Model 4960 A REGULATED OUTPUT LOAD REGULATION LINE REGULATION RIPPLE AND NOISE TEMPERATURE STABILITY TEMPERATURE RANGE OUTPUT IMPEDANCE RECOVERY TIME METER ACCURACY OVERLOAD PROTECTION OUTPUT TERMINALS REMOTE PROGRAMMING POWER DIMENSIONS WEIGHT Specifications TABLE 1 1 SPECIFICATIONS 2 ranges switched by push button switch 0 18 V 600 mA Voltage continuously adjustable from 0 18 V dc 600 mA over entire voltage range 0 36V 300 mA Voltage continuously adjustable from 0 36 V dc 300 mA over entire voltage range Less than 5 mV change in output voltage over full operating range Less than 5 mV change in output voltage for I 10 power line changes FT Less than 150 Ja rms Less than 0 1 C 0 to 559 C Less than 0 02 9 from DC to 1 Kc Less than 0 5 Q from I Kc to 50 kc Less than 50 us after a change from full load to no load 596 of full scale METERS ON OPTION Ol ONLY Output current limite
2. PUERTO RICO San Juan Electronics Inc P O Box 5167 Ponce de Le n 150 Stop 3 Puerta de Tierra Santa San Salvador PANAMA San Juan 00906 Caracas GUATEMALA Electr nica Balboa S A Tel 1809 725 3342 Tel 71 88 05 Ciental importacao e COSTA RICA Olander Associates Latin America PO Box 4929 Cable SATRONICS San Juan Cable CITECAL Caracas Com rcio Ltda Lic Alfredo Gallegos Gurdi n Apartado 1226 Ave Manuel Espinosa No 13 50 Rua Des Eliseu Guilherme 62 Apartado 3243 7a Calle 0 22 Zona 1 Bidg Alina Sao Paulo 8 San Jos Guatemala City Panama City Tel 70 2318 Tel 21 86 13 Te 22812 Tel 30833 Cable ELECTRON Panama City Cable CIENTALCO Sao Paulo Cable GALGUR San Jos Cable OLALA Guatemala City FOR AREAS NOT LISTED CONTACT Hewlett Packard Inter Americas 1501 Page Mill Road Palo Alto Calif 94304 Tel 14151 326 7000 TWX 910 373 1267 Telex 034 8461 Cable HEWPACK Palo Alto 5 67 CO ae Hililareilebenennnetnterritetnrene rannge HEWLETT D hp PACKARD ELECTRONIC INSTRUMENTATION SALES AND SERVICE EUROPE AUSTRIA Unilabor H m b H Wissenschaftliche Instrumente Rummelhardtgasse 6 3 P O Box 33 Vienna 1X 71 Tel 426 181 Cable LABORINSTRUMENT Vienna BELGIUM Hewlett Packard Benelux S A 20 24 rue de H pital Brussels Tel 11 22 20 Cable PALOBEN Brussels YENMARK n age Olsen A S Wonnegade 1 Copenhagen o Tel 29 48 00 Cable TOCOPEN Copennagen FINLAND INTO O Y Merit
3. BE CU BH BP BRS BWO CCW CER TMO DEF LOM t OMP CONN CP CRT W DEPC DR ELECT ENCAP EXT FH FIL H FXD 6 assembly motor vapacitor coupling diode delay hne device signaling iamp amperes automatic frequency control amplifier beat frequency oscillator beryllium copper binder head bandpass brass backward wave vscrilatu r counter o KWISE ceram Cabinet n unt univ toe tic ent commen compusa tien conserter cadm ara plate cath anc rav tube hah se deya tted carbon Ae gt uf electrolytii en a sulated external farads Mat head fillister head fixed LLL LEO AL c OH a GRD HEX HG HR IF z MPG INCD INCL INS INT K LIN LK WASH LOG LPF e M MEG METFLM MFR z MINAT MOM MTG 3 MY N n 6 c 6 7 6 2 REFERENCE DESIGNATORS misc electroni part MP fuse P filter Q jack R relay RT inductor S meter T ABBREVIATIONS germanium N C giass NE ground ed NI PL NO henries NPO hexagonal mercury hour s NRFR intermediate freq NSR impregnated Incandescent rs ludeisj OBD insalation ed OH internal OX kilo 1000 P PC linear taper PF vak washer logar thmie taper PH BRZ low pass friter PHL PIV mili 1072 P O meg 10 6 POLY metal film PORC manufacturer POS miniature POT momentary PP mounting PT mylar RECT RF nano 1079 RH Anal ld LrLLLA det LLAI2IAIIIIIIIIIIIIIIIIIIII
4. Cable SICO Allahbad The Scientific Instrument Co Ld 240 Dr Dadabhai Naoroji Road Bombay 1 Tel 25 2642 Cable SICO Bombay The Scientific Instrument Co Ld 11 Esplanade East Calcutta 1 Tel 23 4129 Cable SICO Calcutta The Scientitic Instrument Co Ld 30 Mount Road Madras 2 Tel 86339 Cable SICO Madras Hewlett Packard Vertriebs GmbH Kurhessenstrasse 95 6 Frankfurt 50 Tei 52 00 36 Cable HEWPACKSA Frankfurt Hewleti Packard Vertriebs GmbH Beim Strohhause 26 2 Hamhurg i Tel 24 05 51 52 Cable HEWPACKSA Hamburg Hewlett Packard Vertriebs GmbH Reginfriedstrasse 13 8 Munich 9 Tel 69 51 21 22 Cable HEWPACKSA Munich GREECE Kostos Karayannis 18 Ermou Street Athens 126 Tel 230 301 Cable RAKAR Athens IRELAND Hewlett Packard Ltd 224 Bath Road Slough Bucks England Tel Slough 28406 9 29486 9 Cab e HEWPIE Stough ITALY Hewlett Packard Italiana S p A Viale Lunigiana 46 Milan Tel 69 15 84 Cable HEWPAC T Milan Hewlett Packard Italiana S p A Palazzo Italia Piazza Marconi 25 Rome Eur Tel 591 2544 Cable HEWPACIT Rome NETHERLANDS Hewlett Packard Benelux N V de Boelelaan 1043 Amsterdam 7 2 Tel 42 77 77 Cable PALOBEN Amsterdam NORWAY Morgenstierne amp Co A S Ingeniofirma 6 Wessels Gate Oslo Tel 20 16 35 Cable MOROF Oslo PORTUGAL Telectra Rua Rodrigo da Fonseca 103 PO Box 2531 Lisbon 1 Tel 68 60 72 Cable TELECTRA Lisb
5. Je r SERIES REGULATOR SES Cw VOLT METER ADJUST Nn e Ae o c LIMIT mA ADJUST 2360 grum REFERENCE WEE neuen DESIGNATIONS WHT ORN GY ES CR5 pe f WHT i ORN GY SERIES REGULATOR QI CURRENT AMPLIFIER A 05 NOTES RESISTANCE IN OHMS CAPACITANCE IN MICROFARADS E EN 2 VOLTAGES MEASURED WITH RESPECT TO S AT 36V 0 3A VOLTAGE 3 X AVERAGE VALUE SHOWN RII AMPLIFIER FACTURY SELECTED 1000 Q3 A 4 OEXTERNAL CONTROLS Y M QINTERNAL ADJUSTMENTS 5 TRANSFORMER CONNECTIONS ups 2 FOR N0 220V OPERATION cipe m 0 15V 6 8V Y Al USE TERMINALS 2 AND 4 n ADJUST DIFFERENTIAL FOR 15 230 V OPERATION E CA EA nd 0 03 V AMPLIFIER O xil 6 8V SE l WHT RED GY l SS 20V AC IO WHT BLK Ve R4I ll 270 i 0 03V R29 0 35V 9K COMPARISON AMPLIFIER Q6 ci C9 CRI CRI4 CRI6 CR22 DSI Fl Ji J2 MI M Figure 5 4 Model 6960A Circuit Diagram PI P2 Q Q8 RI R42 6 8 Y 14 Y Model 69604 Section V SERVICING ETCHED CIRCUIT BOARDS Excessive heat or pressure can lift the copper strip from the board Avoid damage by using a low power soldering iron 50 watts maximum and following these instructions Copper that lifts off the board should be cemented in place with a quick drying acetate base cement having good electrical insulating properties A
6. Rockaway N J U S Engineering Co Los Angeles Calif Blinn Delbert Co Pomona Calif Burgess Battery Co Niagara Falls Ontario Canada Deutsch Fastener Corp Los Angeles Calif Bristol Co The Waterbury Conn Sloan Company Sun Valley Calif ITT Cannon Electric iac Phoenix Div Phoenix Arizona CBS Electronics Semiconductor Operations Div of C B S Inc Lowell Mass Nei Raum indianapolis ind Babcock Relays Div Costa Mesa Calif Texas Capacitor Co Houston Texas Atohm Electronics Sun Valley Calif Electro Assemblies Inc Chicago HI Mallory Battery Co ol Canada Ltd Toronto Ontario Canada General Transistor Western Corp Los Angeles Calif Ti Tal Inc Berkeley Calif Carborundum Co Niagara Falls N Y CTS of Berne Inc Berne Ind Chicago Telephone of California Inc So Pasadena Calif Code No 11242 1131 11534 11711 11717 11870 12136 12361 12574 12697 12728 13859 12881 12930 12954 13103 13396 13835 14099 14193 14298 14433 14493 14655 14674 14752 14960 15203 15287 15291 15558 15566 15631 15772 15818 15909 16037 16179 16352 16688 16758 17109 17474 17675 17745 18042 18083 18476 18486 18583 18873 18911 19315 19500 19589 19644 19701 20183 21226 From Manufacturer Bay State Electronics Corp Teledyne inc Microwave Div Duncan Electronics Inc General Instrument Corp Waltham Mass Palo Alto Calif Costa Mesa Calf Semicondu
7. SUPPLY SUPPLY OUTPUT RECTIFIERS REGULATORS ERROR AMPLIFIER REFERENCE REFERENCE RECTIFIERS REGULATORS Fig 4 1 Block Diagram EE dee EE EE E NN P Sif Model 6960 A Section IV R 3 and R 4 allow a current flow through the rectifier bridges even when no output current is drawn from the instrument Series regulators Q 1 and Q 2 act as variable resistors determining output voltage and current The output current from one regulator is monitored by the resistor combinations R 39 B R 9 and R 8 while R 39 A R 9 and R 10 monitor the current from the other regulator The voltage drop across these resistors is applied to the emitter of Q 5 When this potential exceeds a distinct value determined by R 39 A and B and the load current transistor Q 5 is caused to clip From then on Q 5 holds the base voltage and hence the emitter voltage of Q 1 through CR 13 and voltage amplifier Q 3 thus preventing any further increase in the load current Voltage divider R 5 R 6 adjust the base emitter voltage of transistor Q 2 if the power supply is driven in the 36 V 300 mA range The ammeter M 1 indicates the output current by measuring the voltage across R 22 and the voltmeter M 2 indicates directly the output voltage of the power supply The voltage error amplifier consists of the two transistors Q 7 and Q 8 besides Q 3 In the constant voltage mode changes in the output voltage due to changes in load or line voltage are amplified and applied to the
8. PIEDAD Mad ttt eee TASTET ETTE UTI FAIR in the event that either the circuit board has been damaged or the conventional method is impractical use method shown below This is especially applicable for circuit boards without eyelets Clip lead as shown below 2 Bend protruding leads upward Bend lead of new component around protruding lead Apply solder using a pair of long nose pliers asa heat sink APPLY SOL DER Sara egies EE E EE TT ZE CC EE EE ME T C ZC dd KZ EE ECO This procedure is used in the field only as an alternate means of repair lt is not used within the factory 5 10 Model 6960A 6 1 INTRODUCTION 6 2 This section contains information for ordering replacement parts Table 6 1 lists parts in alpha SECTION VI REPLACEABLE PARTS tebe othe H bee ei Dn been Pb Section VI 6 3 Miscellaneous parts are listed at the end of numerical order of their reference designations and indicates the description and stock number of each part together with any appiicable notes lists parts in alpha numerical order of their stock Table 6 2 number and provides the following information on each part a Description of tne part see list of abbreviatiuns below D Typical manufacturer of the part in a five digit code see list uf manufacturers in Table 6 3 c Manufacturer s part number d Total quantity used inthe instrument TQ column A F C AMPL B F O
9. SM UULTUS T SEA Model 69604 Section III METER INDICATES OUTPUT METER INDICATES OUTPUT VOLTAGE 5 CURRENT Selects maximum current output VOLTAGE ADJUST CURRENT LIMIT mA j Ba O he ee S o O Jr 96 0 300 CONNECT LOAD TO AND TERMINALS B Either terminal may OFF EN 8y FER De connected to OFF Q 6A O 3 grounded cabinet terminal Y NI a X 1 N s SETS POWER POWER Ne CABINET GROUND MAXIMUM OFF ON OUTPUT VOLTAGE Fig 3 1 Operating Controls TTT EH Model 6960 A Section lli 3 5 3 6 3 10 H TT EN el EE Connections to Load The load may be connected to either the front or rear output terminals of the power supply as shipped from the factory Sensing of the output voltage is auto matically accomplished in both modes of operation The user should realize that the specifications describing the electrical characteristics of the power supply are given for measurements made directly at the terminals Long leads between instrument and load deteriorate load regulation which can only be maintained within the specifications of the power supply by using remote sensing as described later in this section of the manual Automatic Parallel Operation Automatic parallel operation as used here is defined as a parallel operation of two or more power supplies with one unit the master acting as a control unit SE and the additional unit
10. Avenue Norwalk 06851 Tel 1203 853 1251 TWX 710 468 3750 DELAWARE 3941 Kennett Pike Wilmington 19807 Tel 1302 655 6161 TWX 510 666 2214 FLORIDA Suite 106 9999 N E 2nd Avenue Miami Shares 33138 Tel 305 758 3626 TWX 810 848 7262 PO Box 20007 Herndon Station 32814 621 Commonwealth Avenue Orlando Tel 305 841 3970 TWX 810 850 0113 PO Box 8128 Madeira Beach 33708 410 150th Avenue St Petershurg Tel 813 391 0211 TWX 810 863 0366 GEORGIA PO Box 28234 2340 Interstate Parkway Atlanta 30328 Tel 4041 436 6181 TWX 810 766 4890 ILLINOIS 5500 Howard Street Skokie 60076 Tel 312 677 0400 TWX 910 223 3613 INDIANA 4002 Meadows Drive Indianapolis 46205 Tel 1317 546 4891 TWX 810 341 3263 LOUISIANA P 0 Box 856 1942 Williams Boulevard Kenner 70062 Tei 1504 721 6201 TWX 810 955 5524 MARYLAND 6707 Whitestone Road Baltimore 21207 Tel 1301 944 5400 TWX 710 862 0850 PO Box 727 Twinbrook Station 20851 12303 Twinbrook Parkway Rockville Tel 1301 427 7560 TWX 710 828 9684 MASSACHUSETTS Middlesex Turnpike Burlington 01803 Fel 1617 272 9000 TWX 710 332 0382 MICHIGAN 24315 Northwestern Highway Southfield 48075 Tel 313 353 9100 TWX 810 232 1532 MINNESOTA 2459 University Avenue St Paul 55114 Tel 612 645 9461 TWX 910 563 3734 MISSOURI 9208 Wyoming Place Kansas City 64114 Tel 816 333 2445 TWX 910 771 2087 2812 South Brentwood Blvd
11. Co South Pasadena Calif Phitadelphia Steel and Wire Corp Philadeiphia Pa Amencan Machine amp Foundry Co Potter amp Brumfield Div Princeton Ind TRW Electronic Components Div Camden NI Genera Instrument Corp Rectifier Div Brooklyn N Y Resistance Products Co Harrisburg Pa Rubbercraft Corp of Calif Torrance Calif Snakeproof Division of Hingis Too Works Elgin IH Signai indicator Corp New York N Y Struthers Dunn inc Pitman N J Thompson Bremer amp Co Tilley Mfg Co Stackpole Carbon Co Standard Thomson Corp Tinnerman Products Inc Transformer Engineers Ucinite Co Waldes Kohinoor Inc Veeder Root Inc Wenco Mfg Co Continental Wirt Electronics Corp Philadelphia Pa Zietick Mig Corp New Rochelle N Y Mepco Division of Sessions Clock Co Morristown N J Schnitzer Alloy Products Co Elizabeth N Electronic Industries Associalion Any brand Tube meeting EIA Standards Washington DC Unimax Switch Div Maxon Electronics Corp Wallingford Conn New York N Y Chicago fH San Francisco Calif t Marys Pa Waltham Mass Cleveland Ohio San Gabriel Calif Newtonville Mass Long Island City N Y Hartford Conn Chicago III United Transformer Corp Oxford Electric Corp Chicago Il Bourns Inc Riverside Calif Acro Div of Robertshaw Controls Co Columbus Ohio Defiance Ohio Monrovia Calif New York N Y Boston Mass Orange Conn All Star Products Inc Avery Adhesive
12. MONITOR HERE LOAD LEAD Bi I Fig 5 3 Recommended Connection at the Power Supply f AC Internal impedance Make your connections according to the block diagram in Figure 5 2 This measurement is made by driving a constant 10 mA alternating current through the power supply and measuring the voltage drop across the output terminals The internal impedance can be easily calculated by Ohm s law By checking the internal impedance you should consider that the power supply s ripple and noise add to the voltmeter reading For performing very exact measurements you have to filter out all ripple and noise voltages up to a fre quency of about 500 cycles or to use a sensitive wave analyser CH Also take care to prevent stray ground loops which make impossible reliable d measurement of internal impedance Up to Kc the internal resistance of the Model 6960 A should be below 0 02 9 Kc up to 50 Kc below 0 5 O Detailed Test Procedure 5 10 The following test procedure should be performed only after the performance test has shown that this instrument is faulty Do not perform this procedure as an inco ming inspection or proof of performance check The following test procedure contains extra checks to help you analyze the troubles in this instrument These extra checks and the data they contain cannot be considered as specifications Because of internal adjustment or even possible replacement of components top bottom and th
13. Omni Spectra Inc Detroit 111 Ze Computer Diode Corp Lodi N J Ideal Prec Meter Co Inc De jur Meter Div Brooklyn N Y Delco Radio Div of G M Corp Kokoma ind Thermonetics Inc Canoga Park Calif Tranex Company Mountain View Calif Hamlin Melal Products Corp Akron Ohio Angstrohm Prec Inc No Hollywood Calif Power Design Pacific Inc Palo Alte Cali Clevite Corp Semiconductor Div Palo Alto Calif Ty Car Mig Co inc TRW Elect Comp Div Curtis Instrument Inc EL DuPont and Co Inc Durant Mfg Co Bendix Corp The Eclipse Poineer Div Thomas Edison Industries Div of McGraw Edison Co Concoa LRC Electronics Electra Mfg Co General Atronics Corp Executone tac FSC Handbook Supplements H4 1 Dated AUGUST 1966 H4 2 Dated NOV 1962 Holliston Mass Des Plames HI Mt Kisco N Y Wilmington Del Milwaukee Wis Teterboro N J West Orange N J Baldwin Park Calif Horseheads N Y Independence Kansas Philadelphia Pa Long istand City N Y 21335 21520 23783 24455 24655 26365 26462 26992 28480 28520 33173 35434 36196 36287 37942 39543 40920 42190 43990 44655 46384 47904 48620 49956 52090 52983 34294 35026 55933 55938 56137 56289 59446 39730 6074 61775 62119 63743 64959 65092 66295 66346 10276 70309 70318 70485 70563 10674 70903 70998 71002 71041 71218 71286 11313 71400 11436 11447 00015 TA
14. St Louis 63144 Tel 314 644 0220 TWX 910 760 1670 NEW JERSEY 391 Grand Avenue Englewood 07631 Tel 201 567 3933 TWX 710 991 9707 NEW MEXICO P O Box 8366 Station C 87108 6501 Lomas Boulevard N E Albuquerque Tel 505 255 5586 TWX 910 989 1665 156 Wyatt Drive Las Cruces 88001 Tel 505 526 2485 TWX 910 983 0550 NEW YORK 1702 Central Avenue Albany 12205 Tel 1518 869 8462 1219 Campville Road Endicott 13760 Tel 607 754 0050 TWX 510 252 0890 236 East 75th Street New York 10021 Tel 1212 879 2023 TWX 710 581 4376 82 Washington Street Poughkeepsie 12601 Tel 914 454 7330 TWX 510 248 0012 39 Saginaw Drive Rochester 14623 Tel 716 473 9500 TWX 510 253 5981 1025 Northern Boulevard Roslyn Long Island 11576 Tel 1516 869 8400 TWX 510 223 0811 5858 East Molloy Road Syracuse 13211 Tel 315 454 2486 TWX 710 541 0482 NORTH CAROLINA P O Box 5187 1923 North Main Street High Point 27262 Tel 919 882 6873 TWX 510 926 1516 OHIO 5579 Pearl Road Cleveland 44129 Tel 216 884 9209 TWX 810 421 8500 2460 South Dixie Drive Dayton 45439 Tel 513 298 0351 TWX 810 459 1925 OREGON Westhilis Mall Suite 158 4475 S W Scholis Ferry Road Portland 97225 Tel 503 292 9171 TWX 910 464 6103 PENNSYLVANIA 2500 Moss Side Boulevard Monroeville 15146 Tel 412 271 0724 TWX 710 797 3650 144 Elizabeth Street West Conshohocken 19428 Tel 215 248 1600 828 620
15. Tool Co Goshen ind JFD Electronics Corp Brooklya N Y San Jose Calif Neptune N J Winchester Mass Chicago IH Jennings Radio M g Cotp Signalite inc J H Winns and Sons Industrial Condenser Corp R F Products Division of Amphenol Borg Electronics Corp Danbury Conn E F Johnson Co Waseca Minn Philadelphia Pa Sandwich ill Mt Vernon N Y international Resistance Co CTS Knights inc Kulka Electric Corporation Lenz Electric Mfg Co Chicago ill Littiefuse Inc Des Plaines Ul Lord Mfg Co Ene Pa C W Marwede San Francisco Calif Genera instrument Corp Micamold Division Newark N J James Millen Mfg Co Inc Malden Mass J W Miller Co Los Angeles Calif Cinch Monadnock Div of United Carr Fastener Corp San Leandro Calif Mueller Electric Co Cleveland Ohio National Union Newark N J Oak Manufacturing Co Crystal Lake IH Bendix Corp The Bendix Pacific Div N Hollywood Calif 17075 17221 17252 17342 17630 17638 17764 17969 78189 18283 78290 78452 18471 78488 78493 18553 18790 18947 79136 79142 79251 19727 19963 80031 80120 80131 80207 80223 80248 80294 80411 80486 80509 80583 80640 81030 81073 81095 81312 81349 81483 81541 81860 82042 82047 82142 82170 82209 82213 82376 82389 82647 82768 From Manufacturer Address Pacific Metais Co San Francisco Calif Phanostran instrument aad Electronic
16. assistance contact your nearest Hewlett Packard Sales and Service Office Addresses are provided at the back of this manual LIE A rr
17. base of Q 1 in such a way as to keep the output voltage constant R 23 is used to adjust the positive feedback from the collector of Q 8 to the base of Q 7 proper adjustment of this feedback will result in no output voltage change when the load current is changed from no load to full load It can even be adjusted to yield a negative output resistance i e when a load is applied the output voltage increases rather than decreases Normally this is adjusted to give zero output resistance and not a negative resistance CR 14 and CR 13 are disconnecting diodes In the constant voltage mode CR 13 is closed CR 14 open so that the current error amplifier is out of circuit In the constant current operation CR 13 will be automatically opened and CR 14 will be closed to isolate the voltage error amplifier The reference supply consists of a complete feedback amplifier Q 4 and Q 6 The reference voltage itself is controlled by zener diodes CR 20 and CR 21 which also stabilizes the negative auxiliary voltages R 41 helps to supply the thermal stability of the base potential of transistor Q 5 Manufacturing tolerances of CR 21 are compensated by factory adjustment of R 27 by means of shunt resistor R 38 The value of R 17 allows current changes proportional to line voltage changes These current changes compensate possible variations of the current through CR 21 with line voltage variation and minimize changes in output voltage me Me T llall
18. circuit current turns out to be too high or too low 2 6 Model 6960 A Section V Me Ar first select the 36 V 0 3 A range and adjust short circuit current by changing the position of R 7 to 340 mA Then switch the power supply into the 18V 0 6 A range and adjust short circuit current with R 10 to 680 mA Caution Do not allow current ratings of more than 400 mA to flow through either of the series regulators This may destroy the series regulators Q 1 and Q 2 I Attention Before performing this adjust the instrument has to be warmed up to its normal operating temperature Ripple Measure ripple according to paragraph 5 8 c Chanae the line voltage of the power supply between 198 V and 242 V Within the wnoie range the ripple vol tage should not exceed 150 AA Veit If there is a gradual r c of inple over 150 Vrms while decreasing the line voltage towards 198 V transistor Q 6 has stopped working Remove R 38 and replace it with a aecade resistance Vary the input line voltage between 198 V and 242 V and adiust the decade so that in the whole range the ripple voltage remains below 150 juVrms At the same time check the voltage between minus lead of capacitor CT and S It should read 14V 2 otherwise transistor Q 4 will not regulate properly Replace the decade value with a fixed resistor of equal value Load Regulation For measuring circuit refer to paragraph 5 8 d If the output voltage change is greater than 5
19. gg 6 5 OO 00000 AJ Al Al 20 20 20 AAA DB DADDD DADA AAADAAA FxD CER FxD CER FxD ELECT FxD ELECT FxXD ELECT FxD ELECT FxD ELECT KNOB CURRENT LIMIT KNOB Voltage Adjust FxD Comp ExD Comp Ex Comp FxD Comp FxXD Comp FxD Comp FxD Comp FxXD Comp FxD Comp FxD Comp FxD Comp FxD Comp FxD Comp ExD Comp FxD Comp FxD Comp FxD Comp FxD Comp FxD Comp FxD Comp FxD Comp FxD Comp FxXD Comp FxD Comp EXD MET FLM see List of Abbreviations in introduction to this section Table 6 2 REPLACEABLE PARTS Description 0 01 vk 1000 VDCW 390 uF 500 VDCW uF 10 VDCW HF 50VDCW uF 29 VDCW uF 63 VDCW HF 50 VDCW 5 B Di 5 Yo 5 9 o 5 o 5 9 5 10 d e 10 10 Hie 209 920 oo NAO Ss 235 z 0 PODIO Q on e 00 10 9 o 210 0 Q 10 V o 0 Q 10 0 210 0 Q 10 Q 10 Q 10 Q 5 Q 10 9 o meg ON OT MN UT OT 2222 2222 22222 22 210 Q 10 Bio Q 5 Q 10 9 o Q 5 MN NN Q 2 Mtr 56289 28480 56289 56289 28480 28480 28480 28480 28480 01121 01121 28480 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 01121 28480 Mfr Part No 29C214A3 0150 0082 D 32877 D 33909 0180 0502 0180 0131 0180 0518 0370 0133 0370 013
20. high as 400 V from ground It is therefore possible to connect a number of supplies in series to obtain higher voltages than 36 V If more current than 600 mA is needed there is the possibility of operating several 35 power supplies in parallel Remote sensing can be used for minimizing the effect of supply lead resistiance and thus providing an exactly regulated voltage at the supplied circuit regardless of lead length 2 0 MEME OQU Q lillllllL nidondstu m Model 69604 Section li SECTION Ii INSTALLATION 2 1 Inspection 2 2 When the Model 69604 is received inspect it for damage received in transit Operate the instrument to make certain that it is functioning satisfactorily f damage is evident follow the procedures outlined in the CLAIM FOR DAMAGE IN SHIPMENT page of this manual inside rear cover 2 3 Power cable 2 4 The three conductor power cable supplied with the instrument is terminated in a three connector male power plug recommended by the VDE Verein Deutscher Elektrotechniker Kr tz WARNING The third conductor grounds the instrument cabinet for the PROTECTION OF OPERATING PERSONNEL If a two con nector line power receptacle is used the instrument cabinet should be grounded externally 2 5 115 V or 230 V Operation 2 6 The instrument is designed to work from 110 115 or 220 230 volts 10 line voltage It is shipped from the factory wired for operation from a 110 V or 220 V source lt may
21. rear terminal strip shown in Fig 3 2 e have only to be performed on the master unit Then the output voltage will vary linearly with the programming resistor at a rate of approximately 200 2 V that means a 200 Q resistor will give I V output a 400 resistor 2V output etc When using a switch to change the programming resistance while the instru ment is on be sure to use a shorting contact type switch to keep the voltage of the supply from rising while switching If the programming circuit is opened even momentarily the voltage from the supply will rise This switching tran sient may damage the circuit under test 3 13 Remote Sensing When the rear terminals of the instrument are connected in the normal fashion the voltage for regulation control sensing voltage is taken from the output of the supply at the front panel This is not always the best point to obtain this voltage because there may be a voltage drop in the supply leads between the load and the supply To get around this effect a separate set of terminals for the sensing voltage 5 and S are provided on the rear of the instrument These terminals permit a separate pair of leads to connect at the load to supply the sensing voltage The leads carry no load current but are inside the regulation loop of the amplifier To use remote sensing run o separate set of leads from the load to the sensing terminals These leads do not need to be as heavy as the supply lead
22. test to make sure the instrument has not been damaged in shipment for periodic maintenance or to check operation of the instrument after repairs a Voltage Range An external DC Voltmeter having an accuracy of 1 96 or better i g the dp Mo del 412A is connected across the output terminals The Model 6960A under test is to be operated in the 36V 300 mA range Turn the VOLTAGE ADJUST clock wise until the 412A indicates 36V output The knob must have been turned more than 180 degrees Turn the VOLTAGE ADJUST fully counterclockwise Output voltage should go through zero to between 2 and 100 mV negative Model 6960 A Section V b Current Limiting Switch off Model 6960A under test and connect the Model 412A with the cur rent range across the output terminals Turn the CURRENT LIMIT fully clock wise VOLTAGE ADJUST should be in a mid range position Push the buttons 18 V 0 6 A or 36 0 3 and wait 15 minutes When the instrument has warmed up measure the maximum short circuit current in both ranges The 412A should read about 340 mA in the 36V range and 680 mA in the 18 V range c Ripple Attach the load resistor for 18 V and 0 6 A to the output terminals and adjust the output voltage and current to these ratings Connect the floating input of AC Voltmeter 403B or equivalent ungrounded AC voltmeter to the output ter minals The readout of the 403B should not exceed 150 pV In the 36 V 0 3 A range the same result should appea
23. 0 TWX 510 660 8715 TEXAS PO Box 7166 3605 Inwood Road Dailas 75209 Tel 214 357 1881 TWX 910 861 4081 PO Box 22813 4242 Richmond Avenue i Houston 77027 in Tel 713 667 2407 TWX 910 881 2645 GOVERNMENT CONTRACT OFFICE 225 Billy Mitchell Road San Antonio 78226 Tei 512 434 4171 TWX 910 871 1170 UTAH 2890 South Main Street Salt Lake City 84115 Tel 801 486 8166 TWX 910 925 5681 VIRGINIA P O Box 6514 2111 Spencer Road Richmond 23230 Tel 703 282 5451 TWX 710 956 0157 WASHINGTON 11656 N E Eighth Street Bellevue 98004 Tel 206 454 3971 TWX 910 443 2303 FOR AREAS NOT LISTED CONTACT Hewlett Packard 1501 Page Mill Road Palo Alto California 94304 Tet 415 326 7000 TWX 910 373 1267 Telex 34 8461 CANADA ALBERTA BRITISH COLUMBIA NOVA SCOTIA ONTARIO Hewlett Packard Canada Ltd QUEBEC 10010 105th Street Hewlett Packard Canada Ltd 7001 Mumford Road Hewlett Packard Canada Ltd 1415 Lawrence Avenue West Hewlett Packard Canada Ltd Edmonton 2184 West Broadway Suite 356 880 Lady Ellen Place Toronto 275 Hymus Boulevard Tel 403 424 0718 Vancouver Halifax Ottawa 3 Tel 416 249 9196 Pointe Claire Tei 514 697 4232 u TWX 610 422 3022 y Telex 01 2819 FOR AREAS NOT LISTED CONTACT Hewlett Packard Inter Americas 1501 Page Mill Road Palo Alto Calif 94304 Tel 415 326 7000 TWX 910 373 1267 Telex 034 8461 Cable HEWPACK Palo Alto Tel 613 722 4223 TWX 61
24. 0 492 2382 TWX 610 562 1952 Tel 902 455 0511 TWX 610 271 4482 TWX 610 831 2431 Tel 604 738 7520 TWX 610 922 5050 CENTRAL AND SOUTH AMERICA ARGENTINA CHILE ECUADOR MEXICO PERU URUGUAY Mauricio A Suarez H ctor Calcagni Laboratorios de Radio Ingenieria Hewlett Packard Mexicana Fernando Ezeta B Pablo Ferrando Telecomunicaciones Casilla 13942 Calle Guayaquil 1246 SA de CV Av Petit Thouars 4719 S A Comercial e Industrial Carlos Calvo 224 Santiago Post Office Box 3199 Eugenia 408 Dept 1 Miraflores Avenida Italia 2877 Buenos Aires Tei 490 505 393 119 Quito Mexico 12 D F Casilla 3061 Casilla de Correo 370 Tel 30 6312 34 9087 Tel 12496 Tel 43 03 79 Lima Montevideo Cable TELEPILOT Buenos Aires Cable HORVATH Quito Tei 50346 Tel 40 3102 NICARAGUA Roberto Ter n G Edificio Ter n Apartado Postal 689 Managua Tel 3451 3452 Cable ROTERAN Managua COLOMBIA Cable RADIUM Montevideo instrumentacion Henrik A Langebaek amp Cia Ltda Cra 7A N 48 51 59 Apartado Aereo 6287 Bogota 1 D E Tel 45 78 06 45 55 46 Cable AARIS Bogota EL SALVADOR Cable FEPERU Lima Electr nica 27 Avenida Norte 1133 Apartado Postal 1589 San Salvador Tel 25 74 50 Cable ELECTRONICA BRAZIL Ciental importacao e Com rcio Ltda Avenida 13 de Maio 13 22 andar Rio de Janeiro G B Tel 42 9483 VENEZUELA Citec C A Edif Arisan Of 4 Avda Francisco de Miranda Apartado dei Este 10934 Chacaito
25. 1 Type J 1 1 2100 0503 R VAR Comp 250 Q 20 2 WLIN 28480 2100 0503 1 1 2100 0504 R VAR Comp 5K Q 20 0 3 W 28480 2100 0504 1 1 2100 0505 R VAR Comp 10K Q 20 0 3 W 28480 2100 0505 1 1 2100 0506 R VAR WW 2x10 Q 10 2 WLIN 28480 2100 0506 1 1 2100 0507 R VAR WW 10 Q 10 05W 28480 2100 0507 2 1 2110 0019 220 V Fuse Cartridge 0 44 A slow blow 75915 313 400 1 10 2110 0020 110 V Fuse Cartridge 0 8 A slow blow 75915 313 800 1 10 3101 0033 Switch Slide 42190 4633 1 1 3101 0503 Switch Push Button 28480 3101 503 1 1 8120 0078 Special Order Power Cord P2 Nema plug 70903 KH4147 1 1 8120 0100 Standard Power P2 Schuko plug 28480 8120 0100 1 1 9100 0513 Transformer Power 28480 9100 0513 1 1 see List of Abbreviations in introduction to this section F omm LN Pr CODE LIST OF MANUFACTURERS TABLE 6 3 The following code numbers are from the Federal Supply Code for Manufacturers Cataloging Handbooks H4 1 Name to Code and H4 2 Code to Name and their latest supplements The date of revision and the date of the supplements used appear at the bottom of each page Alphabetical codes have been arbitrarily assigned to suppliers not appearing in the H4 Handbooks Code No Manufacturer Address 00000 U S A Common Any supplier of U S 00136 McCoy Electronics Mount Holly Springs Pa 00213 Sage Electronics Corp Rochester N Y 00287 Cemco Inc Danielson Conn 00334 Humidial Colton Calif 00348 Microtron Co Inc Vall
26. 7 EB 1025 EB 1515 0683 0685 EB 3915 EB 3305 EB 3335 EB 7515 EB 1021 EB 1531 EB 2211 EB 2711 EB 2721 EB 3331 EB 3911 EB 3921 EB 1031 EB 6821 GB 4315 GB 3321 GB 1011 GB 3921 GB 3615 HB 1021 GB 3315 0760 0501 s ch aah esch P ech EM PE PIT eee each PEN A tr de sch o e see em aan m NI m teke nh male mld manh 4 41 14 1244444 RERSESEARARAS tt Ah hdd RARA RER dn Model 6960 A Section V Table 6 2 REPLACEABLE PARTS CONT D hp eng Description Mfr Mfr Part No TQ RS O 0813 0502 R FxD WW 105 OW 28480 0813 0502 0813 0503 R FxD WW 182 5 2W 28480 0813 0503 1120 0512 Meter Volt 28480 1120 0512 1120 0513 Meter Ampere 28480 1120 0513 1251 0148 Connector Power 0000U H 1061 2 1400 0084 Fuseholder 75915 342014 2140 0015 Lamp Neon 1510 0009 Binding Post Black 28480 1510 050 7 1 1 1510 0503 Binding Post Red 28480 1510 0502 2 1 1850 0169 Transistor Germanium 28480 1850 0169 1 1 1850 0168 Transistor Germanium 28480 1850 0168 2 2 1850 0509 Transistor Germanium 28480 1850 0509 1 1 1851 0017 Transistor Germanium NPN 2N 1304 01295 2N 1304 d 4 1901 0025 Diode Silicon 49956 RD 1526 4 4 1901 0026 Diode Silicon 02735 34531 13 13 1901 0033 Diode Silicon 07910 IN485B 2 2 1902 0048 Diode Zener 28480 1902 0502 1 1 1902 0057 Diode Zener 28480 1902 0048 1 1 2100 0234 R VAR WW 10K Q 20 2 WLIN 0112
27. 72 TAIWAN Hwa Sheng Electronic Co Ltd P 0 Box 1558 21 Nanking West Road Taipei Tel 46076 45936 Cable VICTRONIX Taipei THAILAND The International Engineering Co Ltd P 0 Box 39 614 Sukhumvit Road Bangkok Tel 913460 1 2 Cable GYSOM Bangkok VIETNAM Landis Brothers and Company inc PO Box H 3 216 Hien Vuong Saigon Tel 20 805 Cable LANBROCOMP Saigon FOR AREAS NOT LISTED CONTACT Hewlett Packard Export Marketing 1501 Page Mill Road Palo Alto California 94304 Tel 415 326 7000 Telex 034 8461 Cable HEWPACK Palo Alto 5 67 Il d HEWLETT hp PACKARD CERTIFICATION Hewlett Packard certifies that this instrument was thor oughly tested and inspected and found to meet its published specifications when it was shipped from the factory Hewlett Packard further certifies thatits calibration measurements are traceable to the U S National Bureau of Standards to the extent allowed by the Bureau s calibration facility WARRANTY AND ASSISTANCE All Hewlett Packard products are warranted against defects in materials and workmanship This warranty applies for one year from the date of delivery or inthe case of certain major components listed in the operating manual for the specified period We will repair or replace products which prove to be defective during the warranty period No other warranty is expressed or implied We are not liable for consequential damages For any
28. BLE 6 3 CODE LIST OF MANUFACTURERS Cont d Manufacturer Address Fafnir Bearing Co The New Britain Conn Fanstee Metaliurg cal Corp N Chicago ill British Radio Electronics Ltd Washington D C GE Lamp D vis on Neia Park Cleveland Ohio Genera Radio Co West Concord Mass Gres Reproducer Corp New Rochelie N Y Grobet Fue Co of menca Inc Caristadt N J Lancaster Pa Palo Alto Calf Kenilworth N J Owensboro Ky Chicago HH Ham tor Watch Co Hewlett Packard Co Heyman Mtg Co G E Receiving Tube Dept Lectrohm inc Stanwyck Co i Products Ltg Hawkesbury Ontario Canada Cunningham WH amp Hilt Ltd Toronto Ontaro Canada P R Mallory amp Co inc Indianapolis Ind Mechanica Industies Prod Co Akron Ohio Miniature Precision Bearings Inc Keene N H Muter Co Chicago ill C A Norgren Co Englewood Colo Ohmite Mig Co Skokie fll Penn Eng amp Mfg Corp Doylestown Pa Polaroid Corp Cambridge Mass Preciston Thermometer amp Inst Co Southampton Pa Waltham Mass Westminster Md Waltham Mass Microwave amp Powe Tube Div Rowan Controiler Co Sanborn Company Shallcioss Mfg Co Seima N C Simpson Electric Co Chicago i Sonotone Coip Eimsford N Y Raytheon Co Commercial Apparatus amp Systems Div So Norwalk Conn Spaulding Fibre Co Inc Tonawanda N Y Sprague Electric Co North Adams Mass Telex inc St Paul Minn Thomas amp Betts Co Elizabeth N J Triplett Electrical Inst Co Bluff
29. EIERE EE 444444444444444 49444 Poor oo 22222 Section VI Note Model 6960 A Table 6 1 REFERENCE DESIGNATOR INDEX CON T Reference hp Designation Stock Description No R 31 0690 1011 R FxD Comp 100 Q 10 R 32 0686 1515 R FxD Comp 150 2 59 R 33 0687 1031 R FxD Comp 10 K Q 10 R 34 0689 4315 R FxD Comp 430 Q 5 R 35 0760 0501 R FxD Met FLM 13K Q 2 we R 36 see R 18 ZS R37 Shunt Resistor R 38 Shunt Resistor R 39 A B 2100 0506 R VAR WW 2x10 10 2 WLIN R 40 2100 0234 R VAR WW 10K Q 20 2 WLIN R 41 0687 2711 R FxD Comp 270 Q 10 0 5 W R 42 see R 33 R 43 0683 0685 R FxD Comp 6 80 2 5 0 25 W S 1 3101 0033 Switch Slide S 2 3101 0503 Switch Push Button T 1 9100 0513 Transformer Power W 1 8120 0100 Standard Power P2 Schuko Plug W 2 8120 0078 Special Order Power Cord P2 Nema Plug Miscellaneous 0370 0133 Knob Current Limit 0370 0137 Knob Voltage Adjust 1400 0084 Fuseholder see List of Abbreviations in introduction to this section Tet nn A EE EEN EN Model 6960 A hp Stock No 0150 0012 0150 0082 0180 0032 0180 0049 0180 0502 0180 0131 0180 0518 0370 0133 0370 0137 0686 1025 N686 1515 0683 0685 0686 3915 0686 3305 0686 3335 0686 7515 0687 1021 0687 1531 0687 2211 0687 2711 0687 2721 0687 3331 0687 3911 0687 3921 0687 1031 0678 6821 0689 4315 0690 3321 0690 1011 0690 3921 0692 3615 0693 1021 0692 3315 0760 0501
30. HP Archive This vintage Hewlett Packard document was preserved and distributed by www hparchive com Please visit us on the web On line curator Martin Fischer Pio arte 06960 90002 OPERATING AND SERVICE MANUAL MODEL 6960A DC POWER SUPPLY Serials Prefixed G 604 Copyright Hewlett Packard GmbH 1964 7030 B blingen HerrenbergerstraBe 110 W Germany Printea 8 67 23153521333321 53322 818 322222 HEEL EAE E LEAL ae ee NES PLENEN TN HE HHLaded eL ser 2432111719 Model 6960 A Section VI Table of Contents List of Illustrations and Tables TABLE OF CONTENTS Page GENERAL INFORMATION ee edis 1 1 1 1 Introduction 584950999929 6 29 92 859 88000000896 9520268 1 1 1 3 Instrument Identification ooooooo Greg 1 1 1 5 General Description spase ecaoree ODeevcecacecos 1 1 INSTALLATION ep op gpeeboeegseoeggeeeegeoe egeeeeeg Ze 2 1 Inspection 69 028a6 9 8 924936 90 0586 6 6 6 0899090920529 489 520 2 1 2 3 Power cable 9 P o 9g ee e 9 e 8 v amp 6 6 D Bb 9 08 8 6 606 9 e 9 9 9 9 e e 2 1 5 2 5 115 V or 230 V Operation YEE EEE EE EEE epp 02089 2 1 OPERATING INSTRUCTIONS iussa eR CURRERE zu 3 1 3 1 Operating Controls arar ra J Jed Current Limit Control ZE E 3 1 3 5 Connections to Load ve T 3 3 3 7 Automatic Parallel Operation ue 3 3 3 9 Automatic Series Operation eau nu 3 3 3 1 1 Remote Programming amp 5 9g O O 9 P 9 OQ O O e ep og eg oe 9 O 9
31. IIIIIIIII IIIIIZ2222122121 11 11 8 2 2 5225 222252 Table 6 1 m onm it oH Gf uoa hs dg WW H n HU a D nu 4 H H nou Description mechanical part plug transistor resistor thermistor switch transformer normally closed neon nickei plate normaliy open negative positive zero zero temperature coefficient not recommended for field replacement not separately replaceable order by description oval head oxide peak printed circuit picofarads 10 12 farads phosphor bronze Phillips peak inverse voltage part of polystyrene porcelain position s potentiometer peak to peak point rectifier radio frequency round head Hewlett Packard stock number Circuit reference designation TOL TRIM TWT VAR VDCW 6 4 ORDERING INFORMATION 6 5 To order a replacement part address order or inquiry to your local Hewlett Packard Field Office see maps at rear of this manual for addresses p H n bh H n A h MW n nm d dr TTT Abens AE EE 3222722222222 2213 1 17 i Specify the following information for each part Model and complete serial number of instrument RERI To order a part not listed n Takles 6 1 and give a complete description of the part and include its function and location terminal board teat point vacuum tube neon bulb photccell etc cable Socket crystal rack mount only gu root mean square uc slow blow screw selenium section
32. Label Corp Hammarlund Co Inc Stevens Arnold Co Inc international lastrumenis Inc Grayhill Co LaGrange Ii Triad Transformer Corp Venice Calif Winchester Elec Div Litton ing Inc Qakville Conn Military Specification JP international Rectifier Corp El Segundo Calif Apax Electronics Inc Cambridge Mass Barry Controls Div Barry Wright Corp Watertown Mass Carter Precision Electric Co Skokie Il Sperti Faraday inc Copper Hewitt Electric Div Hoboken N J Jeffers Electronics Division of Speer Carbon Co Du Bois Pa Fauchild Camera amp Inst Corp Defense Prod Division Clifton N J Maguire Industries Inc Greenwich Conn Sytvania Electric Prod Inc Electronic Tube Division Emporium Pa Astron Corp East Newark Harrison NJ Switchcraft Inc Chicago Ill Metals amp Controls inc Spencer Products Attieboro Mass Phillips Advance Control Co Joliet iit FSC Handbook Supplements H4 1 Dated AUGUST 1966 H4 2 Dated NOV 1962 GmbH HEWLETT d PACKARD MANUAL CHANGES MODEL 6960 A T m mom NSL AER eS ETG ET sc oc nS DC POWER SUPPLY Manual Serial Prefixed 604 Manual Printed AUG 1967 To adapt this manual to instruments with other serial prefixes check for errata below ERRATA Change Add Add 9320 0535 and make changes shown in tables Instrument Serial Prefixes Make Manua Changes G 604 and above In fable 1 1 Specifications Delete Mete
33. TIlllllllllikis ee n n PT RUIT A rett demnm inm m net nine ehm emm mem emm A EEN EN enen m ces a ai Model 6960 A Section V 3 1 5 4 A _ _ _ _ tt dE EE EE EE EE EE EE EE EE EE EE ai SECTION V MAINTENANCE introduction This section contains maintenance and service information for the Model 6960 A Power Supply A performance check can be made with the instrument in its cabinet and is a good test as part of prevention maintenance and incoming quality control inspection hi General Maintenance Information The power supply has no parts which have a definite limited life The instrument should operate indefinitely with no routine maintenance If any parts are replaced you should recheck the settings of R 7 R 10 maximum short circuit current R 23 load regulation and if necessary R 20 and R 21 meter adjusts Variations among parts may make it necessary to readjust the controls slightly Reseal the controls with adhesive or point after adjustment otherwise the setting will change with shock and vibration A list of possible troubles and the probable cause are tabulated in paragraph 5 12 In each case curing the trouble involves replacing the defective parts Be careful when soldering on the etched circuit board You can cause damage by excessive heat or improper technique Test Equipment Required Test equipment required to test this instrument is listed in table 5 1 The necessary specifications req
34. be re wired for operation from a 115 V or 230 V line by changing connection on transformer T1 from 4 A to 4 and from 2 A to 2 see Figure 5 4 To operate from 220 V 230 V line set the slide switch on the rear panel to 230 V to operate from 110 V 115 V set the slide switch to 115 V Fuse F1 should be 0 4 slow blow for 220 V 230 V and 0 8 slow diti blow for 110 V 115 V aure T ertrt GER ii ITpt 64 NHPHIHIHIHm e HBBNNHIINTINIIINTINIMINI TISITIIDIII 211222222222222212222122 2223122222222 2 21212 22 2212 30 3 4 1 31 2 22 2 EE SE TER EE FERES A 1 1 19 111 1E IEEE E ENSE e ehem teet eee te RR ERA tite er ber rrr eT tet Ett Eran te Tr ART Pa TEES E rr ne ee terre e RR EAE UNA ue Marte HELI EE E IMS Aeddi RE CU fI W bARATAFAFALEFERTETESEETERERERERESER A EAELAIADALATIILIAAIIATIAIIRIIIIIIIILAIIIlIIIIIIIIIIIIIIIIIIII IIIIIIIIII IT IIIIIITITIIIIIIIIIIIIIIIiIIITDIIT IDIiiIIIDI IN 1212121222221212271 Model 6960 A Section II 3 1 3 3 3 4 QT PETER ELE TS EECH EE IA PERLA AR CO mt SS A RARA UL Me eater rr EREECHEN ee EE A NO A qaas ki KEE KE e El SECTION IH OPERATING INSTRUCTIONS Operating Controls Figure 3 1 shows the functions of the front panel controls and terminals and is self explanatory To turn the instrument on push in either of the range buttons according to the voltage and current which is desired Accidental setting of both buttons 18 V and 36 V will cause no damage to the unit in this cas
35. break in the copper should be repaired by soidering a short length of tinned copper wire across the break Use only high quality rosin core solder when repairing etched circuit boards NEVER USE PASTE FLUX After soldering clean off any excess flux and coat the repaired area with a high quality electrical varnish or lacquer When replacing components with multiple mounting pins such as tube sockets electrolytic capacitors and potentiometers it will be necessary to lift each pin slightly working around the components severai times until it is free WARNING 1f the specific instructions outlined in the steps below regarding etched circuit boards without eyelets are not followed extensive damage to the etched circuit board will result 1 Apply heat sparingly to lead of component to be 2 Reheat solder in vacant eyelet and quickly in replaced If lead of component passes through sert a small awl to clean inside ofhole If hole an eyelet inthecircuit board apply heat on com does not have an eyelet insert awl or a 57 ponent side of board If lead of component does drill from conductor side of board not pass through an eyelet apply heat to con ductor side of board GE CONDUCTOR SE SIDE 3 Bend clean tinned leads on new part and care 4 Hold part against board avoid overheating and fully insert through eyelets or holes in board solder leads Apply heatto component leads on correct side of board as explained in step 1
36. ctor Div Products Group Newark N J Imperial Electronic Inc Buena Park Calif Melabs Inc Palo Alto Calif Philadeiphia Handle Co Camden N J Grove Mfg Co Inc Guiton Ind inc CG Elect Div Albuquerque N M Dover N H W Haven Conn Shady Grove Pa Clarostat Mfg Co Elmar Fitter Corp Nippon Electric Co Ltd Metex Electronics Corp Della Semiconductor inc Dickson Electronics Corp Thermolloy Telefunken GmbH Midland Wright Div Clark N J Newport Beach Calif of Pacific Industries Inc Address Tokyo Japan H Scottsdale Arizona Dallas Texas Hanover Germany Kansas City Kansas Sem Tech Newhury Park Calif Calif Resistor Corp Santa Monica Calif American Components inc Conshohocken Pa ITT Semiconductor Div of Int Telephone amp Telegraph Corp West Palm Beach Fla Hewlett Packard Company Loveland Colo Cornell Dublier Electric Corp Newark N J Corning Glass Works Corning N Y Electro Cube tac So Pasadena Calif Williams Mfg Co San Jose Calif Webster Etectronics Co New York N Y Scionics Corp Northridge Calif Adjustable Bushing Co N Hollywood Call Micron Electronics Garden City Long Island N Y Amptobe Inst Corp Lynbrook N Y Cabletronics Costa Mesa Calif Twentieth Century Cos Spring Co Santa Clara Calif Ameico inc Mt View Calif Daven Div Thomas A Edison ind McGraw Edison Co Long Island City N Y Spruce Pine Mica Co Spruce Pine M C 4
37. e 3 4 3 13 Remote Sensing 9 898 pa og ege ep e 006080 090649 ee e 06060064 3 4 PRINCIPLES OF OPERATION 4 9 9 9 9 9 9 o e 05 6 6 9 9 5 58 9 9 9 5 4 1 4 1 Overall Block Diagram eee erre 4 zx 4 3 Circuit Description 6 4 9 6 9 6 9 9 9 og O 9 9 9 5 9 64 9 68 5 e GEN E MAINTENANCE 2 e ep e o ep e oe 5 00 amp ep B O8 e 9 D 9 O8 9 P 9 P 9 8 e 9 e 5 5 1 Introduction bdo 9 9 59 po 4 8 6 Aa ep e ege pe ege ge ep 8 6 8 ge 5 5 3 General Maintenance Information oooono 5 1 5 5 Test Equipment Required e err 3 1 5 7 Performance Tests oooo o m 5 2 5 9 Detailed Test Procedure ooooonoo rud iude 5 5 5 11 Trouble Shooting D e 400 Ef O P 9 9 88808298 0008 pa 9 g ese 5 5 8 REPLAGEABLE PARIS Xuuwuswkxds wawa Ue E ea Ra d 6 1 PL JH OdUCGLIOnt iaa EE 6 1 6 4 Ordering Information vecino 6 1 Model 6960 A Table of Contents List of lilustrations and Table LIST OF ILLUSTRATIONS Number Page 1 1 Model 6960A Power Supply 1 1 3 1 Operating Controls saciar cue 3 2 3 2 Terminal Connections mo 3 6 4 2 Block Didgram uices sua Ee rd ess n Rey ETT 4 5 1 Measuring Line Load oooooosonoooccssocsranernss 5 4 Regulation and Ripple 5 2 Measuring AC Internal Impedance ene 5 4 5 3 Recommended Connections at the Power Supply 5 5 5 4 Model 6960 Circuit Diagram ooooooocmmoocororonso 5 9 5 5 Servicing Etched Circuit Boards
38. e side covers may have to be removed Make sure that the ac fuse is inserted in the fuse holder The VOLTAGE ADJUST on the front panel should be in a mid range position the CURRENT LIMIT control turned fully clockwise Use E iH GC LE Iain Ul A HREF be ei ott un st s n HH ELATI TT tem TES 11173989046 eet h ARA TILTITIDITILIIIDILISTIT TEL ee tee eee te eee eee rr rr rre rro rre rre REPE TERT TET ET e pTTEETTTENTATYTITA143233239331337372 22 32 32 Y2 22 42 2 37 mr Thre TET rtorras mo dond dnd Tre eee Model 6960 A Section V an ohmmeter e g Y Model 412A to make certain the negative output terminal the positive output terminal and the collectors of Q 1 and Q 2 are not grounded Now switch the Model 6960A on Vary the output voltage in both voltage ranges with the VOLTAGE ADJUST to be sure that the voltage control is operative ol Meter Zero Set b When the instrument is at normal operating temperature and then switched off the meter pointers must rest on the zero calibration mark of the meter scale If they are outside the zero mark adjust the them as follows After turning off the instrument wait two minutes for power supply capacitors to discharge completely Rotate adjustment screw below the meter scale clockwise until the meter pointer is to the left of zero and farther clockwise rotation will move the pointer upscale towards zero Turn the adjustment screw clockwise until the pointer is exact
39. e the instrument has been switched to the 36 V 300 mA range Pushing in the button marked OFF turns the instrument off Current Limit Control This knob adjusts the peak current output of the supply The indication is nominal To set the value exactly remove the load and short the power supply terminals Adjust the CURRENT LIMIT control until the meter indicates the required maximum current If the supply is to be used in an application where the current drawn from the instrument is not essentially uniform with respect to time e g in pulse type circuits then the fast acting character of the current limiting circuit must be taken into consideration The average current may be within the supply rating or below the maximum current set with the CURRENT LIMIT control but peak currents may be high enough to cause the supply to clip The CURRENT LIMIT control must consequently be set to a value which is greater than the peak current requirements of the circuit The output terminals are connected internally to a 200 uF capacitor which helps supply high current peaks provided they are of in duration Any exter nal capacity added will improve the peak current capability but wil decrease the safety provided by the current limit control High range currents may then destroy external components before the average current inside the supply M increases sufficiently to cause the limiting circuit to operate d AAA ARA TI A Oe Je m LEE LEET
40. el 551 0215 Yokogawa Hewlett Packard Ltd Ohashi Building No 59 I chome Yoyogi Shibuya ku Tokyo Te 370 2281 Cable YOKOHEWPACK Tokyo Telex 232 2034 KENYA R J Tilbury Ltd P 0 Box 2754 Suite 517 518 Hotel Ambassadeur Natrobi Tei 25670 26803 68206 Cable ARJAYTEE Nairobi KOREA American Trading Co Korea Ltd Seoul P 0 Box 1103 112 35 Sokong Dong Jung ku Seoul Tel 3 7049 3 7613 Cable AMTRACO Seoul LEBANON Constantin Macridis Clemenceau Street Clemenceau Center Beirut Tel 220846 Cable ELECTRONUCLEAR Beirut MALAYSIA MECOMB Malaysia Ltd 2 Lorong 13 64 Section 13 Petaling Jaya Selangor Cable MECOMB Kuala Lumpur NEW ZEALAND Sample Electronics N Z Ltd 8 Matipo Street Onehunga S E 5 Auckland Tel 667 356 Cable ELPMAS Auckland PAKISTAN EAST Mushko amp Company Ltd 31 Jinnah Avenue Pacca Tel 80058 Cabie COOPERATOR Dacca PAKISTAN WEST Mushko amp Company Ltd Oosman Chambers Victoria Road Karachi 3 Tel 51027 52927 Cable COOPERATOR Karachi SINGAPORE Mechanica and Combustion Engineering Company Ltd 9 Jalan Kilang Singapore 3 Tel 642361 3 Cable MECOMB Singapore SOUTH AFRICA F H Flanter amp Co Pty Ltd Rosella House Buitencingle Street Cape Town Tel 3 3817 Cable AUTOPHONE Cape Town F H Flanter amp Co Pty Ltd 104 Pharmacy House 80 Jorissen Street Braamfontein Johannesburg Tel 724 41
41. ey Stream N Y 00373 Garlock inc Electronics Products Div Camden N J 00656 Aerovox Corp New Bedford Mass 00779 Amp inc Harrisburg Pa 00781 Aircraft Radio Corp Boonton N J 00815 Northern Engineering Laboratories Inc Burlington Wis 00853 Sangamo Electric Co Pickens Div Pickens C 00866 Goe Engineering Co Los Angeles Calif 00891 Carl E Holmes Corp Los Angeles Calif 00929 Microlab inc Livingston N J 01002 General Electric Co Capacitor Dept Hudson Falls N Y 01009 Aiden Products Co Brockton Mass 01121 Allen Bradley Co Milwaukee Wis 01255 Litton industries Inc Beverly Hills Calif 01281 TRW Semiconductors Inc Lawndale Calif 01295 Texas Instruments Inc Transistor Products Div Dallas Texas 01349 The Alliance Mfg Co Alliance Ohio 01589 Pacific Relays Inc Van Nuys Calif 01930 Amerock Corp Rockford iH 01961 Pulse Engineering Co Santa Clara Calif 02114 Ferroxcube Corp of America Saugerties N Y 02116 Wheelock Signals inc Long Branch N J 02286 Cole Rubber and Plastics inc Sunnyvale Calif 02660 Amphenol Borg Electronics Corp Chicago Ill 02735 Radio Corp of America Semiconductor and Materials Div Somerville N J 02771 Vocal ne Co of America Inc Old Saybrook Conn 02777 Mopkins Engineering Co San Fernando Calif 03508 G E Semiconductor Prod Dept Syracuse N Y 03705 Apex Machine amp Tool Co Dayton Ohio 03797 Eidema Corp Compton Calif 03877 Transitron Electric Corp Wakefield Mas
42. facturer Address CTS Corp Ejkhart ing TT Cannon E ectuc tac Los Angeles Calif Cinema Div Aerovox Corp Burbank Cati C P Clare amp Co Chicago H ot G obe Union Inc Milwaukee Wis Centratab Dev Commercia Plastics Co Chicago lt Cornish Wire Co The New York N Y Coto Cor Co inc Providence R Chicago Minature Lamp Works Chicago IH AO Smith Com Crowley Div West Orange N J Cinch Mtg Co Howard Jones Div Chicago HI Dow Corning Corp Midland Mich Etectro Mot ve Mfg Co Int Willemantic Conn john E Fast Co Div Victoreen instr Co Chicago ill Dialignt Corp Brooklyn N Y indiana General Corp Electronics Div Keasby NI General instrument Corp Cap Div Newark N J Drake Mfg Co Chicago IH Hugh H Eby Inc Philadelpnia Pa Gudeman Co Chicago Ill Robert M Hadley Co Los Angeles Calif Erie Technological Products Inc Ene Pa Hansen Mfg Co Inc Princeton Ind H M Harper Co Chicago HI Helipo Div of Beckman Inst Inc Fullerton Calif Hughes Products Division of Hughes Aircraft Co Newport Beach Calif Amperex Electronic Co Div of North American Phillips Co Inc Hicksville N Y Bradley Semiconductor Corp New Haven Conn Carling Electric Inc Hartford Conn Circle F Mig Co Trenton N J George K Garrett Co Div MSL industries Tac Philadelphia Pa Federal Screw Products Inc Chicago Ill Fischer Special Mfg Co Cincinnati Ohio General Industries Co The Elyria Ohio Goshen Stamping amp
43. ference Designation thru OMA tN C thru 10 OT P GN 24 hp Stock No 1850 0168 1850 0169 1850 0509 1851 0017 0690 3321 0690 3921 0693 1021 0692 3615 0692 3315 2100 0507 0813 0503 0686 1025 0636 3015 0687 2211 0687 1021 0686 3915 0687 3921 0687 1531 0687 3331 0687 3911 2100 0505 2100 0503 0813 0502 2100 0504 0686 3335 0687 2721 0687 6821 0686 7515 0686 3305 Description Transistor Germanium Transistor Germanium Transistor Germanium Transistor Germanium R FxD Comp R FxD Comp R FxD Comp R FxD Comp 360 R FxD Comp 330 R VAR WW 10 R FxD WW 1 8 see R7 R FxD Comp 1 R FxD Comp 300 R FxD Comp 220 R FxD Comp 1 R FxD Comp 390 R FxD Comp 3 9 R FxD Comp 15 R FxD Comp 33 R FxD Comp 390 R VAR Comp 10 R VAR Comp 250 R FxD WW 1 R VAR Comp 5 R FxD Comp 33 R FxD Comp 2 R FxD Comp 6 see R 11 R FxD Comp 750 R FxD Comp 33 Table 6 1 REFERENCE DESIGNATION INDEX CON T NPN 2N 1304 Q 10 0 5 W Q 5 2 W Oo Cu ua ma du om on iw 2222222222222 0 2 0 0 59 0 Q 5 0 5 W see List of Abbreviations in introduction to this section lt ss zzz 10 0 5 W 10 Yo 0 5 W Q 5 0 5 W Section VI Note E i E E E E E E E E i i E i E E 3 E Hf Hur se St ET ET n SE ut Md E E The HE TTT KORTESTE ESA tt
44. interunit connections are shown in Fig 3 2 b for two units and in Fig 3 2 d for three or more units The connection beween S of the master and A 2 A 3 of the first slave has to be done by means of a 10 K Q 0 5 W resistor lq4lateemerurr t thr Model 6960 A Section Ill Prior to turn on set the VOLTAGE ADJUST control on the master unit fully counterclockwise and the ones on all slave units fully clockwise Then turn on all units and adjust the master unit to the desired voltage If the slave units do not track the master unit turn off all instruments and recheck your connec tions For minimum ripple across connected outputs add a 5 uF or larger 50 V electrolytic capacitor from 5 to A2 terminals on all slave units All instru ments must be operated on the same range D not connect more than ten units in series to avoid exceeding the 400V rating from or output terminals to chassis 3 1 Remote Programming 3 12 The output voltage of Model 6940A may be changed by actuating the front E panei VOLTAGE ADJUST control or by changing me e of ihe external programming resistor If a number of Model 6960A s are connected in series or parallel all units can be conrroiled by charging the programming resistor attached to the master unit only Thus the output voltage may be program med remotely by using stepping switches to change the value of the external resistor in accordance with a programmed procedure The connections on the
45. ly over the zero mark on the scale If the screw is turned too far repeat the procedure Turn meter adjustment screw slightly counterciockwise to break contact between adjustment screw and pointer mounting yoke but not far enough to move the pointer downscale If screw is turned too far as shown by needle movement repeat the procedure Volt Meter and Ammeter Calibration Set the output to exactly 36 V controlled by an external dc voltmeter which has better than 1 full scale error i g Model 412A Adjust the built in voltmeter to exactly 36 V by means of variable resistor R 20 Switch the Model 6960A under test into the 18 V 0 6 A range and bring the output current to exactly 600 mA controlled by an external dc ammeter like the 4 Model 412A Adjust variable resistor R 21 so the front panel ammeter reads exactly 600 mA Maximum Short Circuit Current The short circuit current can be measured either by measuring the voltage drop across a 1 Q precision resistor between the output terminals or by switching off the instrument and connecting the current leads of the mo del 412A across the output terminals and turning on the Model 6960A The CURRENT LIMIT conrrol must be set fully clockwise The maxium rating of short circuit current should be 360 mA or 720 mA respectively the minimum ratings are 330 mA or 660 mA The nominal and factory adjusted values are 340 mA and 680 mA These ratings should be adjusted as follows if the short
46. mV while switching the load off and on adjust resistor R 23 so that the change is within the specification After setting R 23 turn the VOL TAGE ADJUST knob fully counterclockwise A dc voltmeter across the output terminals of the power supply must indicate a negative voltage between 2 mV and 100 mV Line Regulation If the adjustment described in paragraph 5 10 d has been done carefully the output voltage change caused by input line voltage changes should normally be within the specification If there are nevertheless excessive changes remove R 37 and replace it with a decade resistance The decade is adjusted so the change of output voltage lies within specification Replace the decade with a fixed resistor of equal value Model 6960 A Section V 5 11 Troubleshooting 5 12 Components within Hewlett Packard instruments are conservatively operated to provide maximum instrument reliability In spite of this parts within an instrument may fail In this case a systematic approach can greatly simplify and thereby speed up the repair CAUTION Be careful not to short voltages across the transistors small bias changes may ruin a transistor due to excessive dissipation Be sure to turn the instrument off before doing any soldering If there is no voltage throughout the instrument check the fuse and primary trans former circuit Transistors Q 1 and Q 2 should have a voltage drop of about 5 to 6 V across them If the pilot lamp is on bu
47. ng Figure 3 2 Terminal Connections Mode 6960 A Section IV 4 2 4 3 POWER LINE 4 1 SECTION IV PRINCIPLES OF OPERATION Overall Block Diagram As shown in Figure 4 1 the power transformer feeds two fullwave rectifiers The rectified AC is filtered and controlled by a series regulator The two built in series regulators can be operated either in series or parallel depending upon the selected range of the push button switch and are controlled from the error amplifier monitoring the output voltage of the supply The voltage monitoring error amplifier senses any change in the output voltage compared to a reference voltage The output of the amplifier causes the resistance of the series regulator to be varied in such a way as to keep the output voltage constant The programming current determined by the reference voltage and the series resistor R 35 flows mainly through the VOLTAGE ADJUST potentiometer R 40 The product of PE the programming current and the value of R 40 equals the output voltage Circuit Description The schematic diagram Fig 5 4 shows all details of the circuit Power trans former is shown to consist of three secondary windings of which the upper two are the main sources of DC power while the lower supplies the reference and auxiliary voltage circuit Rectifier bridges CR 3 to CR 6 and CR 7 to CR 10 are coupled by R 1 Filtering is provided by capacitors C2 and C3 Resistors
48. on SPAIN Ataio Ingerieros Urgel 259 Barcelona 11 Tel 230 69 88 Ataio ingenieros Enrique Larreta 12 Madrid 16 Tel 235 43 44 Cable TELEATAIO Madrid SWEDEN HP Instrument AB Hagakersgatan 7 Moindal Tel 031 27 68 00 HP Instrument AB Centralvagen 28 Solna Tel 08 83 08 30 Cable MEASUREMENTS Stockholm SWITZERLAND HEWPAK AG Zurcherstrasse 8952 Schlieren Zurich Tel 051 98 18 2 Cable HEWPACKAG Zurich TURKEY Telekom ngineering Bureau PO Box 376 Galata Istanbul Tel 49 40 40 Cable TELEMATION Istanbul UNITED KINGDOM Hewlett Packard Ltd 224 Bath Road Slough Bucks Tet Slough 28406 9 29486 9 Cable HEWPIE Slough YUGOSLAVIA Belram S A 83 avenue des Mimosas Brussels 15 Belgium Tel 35 29 58 Cable BELRAMEL Brussels Route des Acacias Geneva Switzerland Tel 022 42 81 50 Telex 2 24 86 Cable HEWPACKSA Geneva The Scientific Instrument Co Ld B 7 Aimeri Gate Extn New Delhi 1 Tel 27 1053 Cable SICO New Delhi IRAN Telecom Ltd P 0 Box 1812 Teheran Tel 43850 48111 Cable BASCOM Teheran ISRAEL Electronics amp Engineering Div of Motorola Israel Ltd 16 Kremenetski Street Tel Aviv Tel 35021 2 3 Cabie BASTEL fel Aviv JAPAN Yokogawa Hewlett Packard Ltd Shinhankyu Building No 8 Umeda Kita ku Osaka City Tel 0726 23 1641 Yokogawa Hewiett Packard Ltd Ito Building No 59 Kotori cho Nakamura ku Nagoya City T
49. orp Linde Div Kemel Dept Cleveland Ohio Htumitronie Engineering Co Sunnyvale Calif Cosmo Plastic o Electrical Spec Co Cleveland Ohio Barber Colman Co Rockford II Tiffen Optical Co Roslyn Heights Long Island N Y Metro Tel Corp Westbury N Y Stewart Engineering Co Santa Cruz Calif Wakefield Engineering Inc Wakefield Mass Bassick Co The Bridgeport Conn Raychem Corp Redwood City Calif Bausch and Lomb Optical Co Rochester N Y E TA Products Co of America Chicago IH Amatom Electronic Hardware Co Inc New Rochelle N Y Beede Electrical Instrument Co Inc Penacook N H General Devices Co inc Indianapolis ind Semcor Div Components Inc Phoenix Anz Tortington Mfg Co West Div Van Nuys Calif Varian Assoc Eimac Div San Carlos Calif Kelvin Electric Co Van Nuys Calif Digitran Co Pasadena Calif Transistor Electronics Corp Minneapolis Minn Westinghouse Electric Corp Electronic Tube Div Eimira N Y Filmohm Corp New York N Y Cinch Graphik Co City of Industry Calif Avnet Corp Culver City Calif Fairchild Camera amp inst Corp Semiconductor Div Mountain View Calif Minnesota Rubber Co Minneapolis Minn Birtcher Corp The Monterey Park Calif Sylvania Elect Prod Inc Mt View Operations Mountain View Calif Technical Wire Products Inc Cranford N J Continental Device Corp Hawthorne Calif Raytheon Mfg Co Semiconductor Div Mountain View Calif Hewlett Packard Co Boonton Radio Div
50. r d Load regulation For the connections refer to block diagram in Figure 5 1 If the load is switch ed off and on the output voltage change in both ranges should not exceed 5 mV The internal resistance of the power supply under test should be positive that is with load off the output voltage should be higher than with load on If you lack a good differential voltmeter take a second Model 6960A or another constant voltage source and compare the output voltage changes to the power supply under test using a sensitive DC voltmeter like the Model 412A or amp Model 425 A id e Line regulation Take the same connections as in paragraph 5 8d change the line voltage of the Model 6960A under test by means of a variable line transformer between 198 V and 242 V The change in output voltage should not exceed 5 mV on both ranges 9 9 EF Sr Section V Model 6960A DIFFERENTIAL VOLTMETER VARIABLE TRANSFORMER ADJUSTABLE FROM 198 242V D f k some Mex E KZ LU CONTROLS VOLTMETER VOLTMETER VOLTAGE Mcr SE X LOAD SWITCH LOAD Fig 5 1 Measuring Line Load Regulation and Ripple AC MEASURES INTERNAL IMPEDANCE VOLTMETER IOV iOOO a 6960 lt e NOE OSCILLATOR 1 50 AC VOLTMETER MONITORS CURRENT IOV I0mA THROUGH IKA Fig 5 2 Measuring AC Internal Impedance 5 4 vttrtitttttt rrerss Model 6960 A Section V 2 9 OUTPUT TERMINAL DO NOT MONITOR HERE
51. r continuously variable ES from 80 to 600 mA on 0 18 V range i 40 to 300 mA on 0 36 V range Three banana jacks spaced 3 4 inch apart Positive and negative terminals are isolated from chassis A maximum of 400 V may be connected between ground and either output terminal About 200 2 V external resistance applied to rear mounted terminals 110 220 V 10 50 to 60 cps 40 watts 115 230 V t 10 50 to 60 cps 40 watts 6 3 32 inches 155 mm high 5 1 8 inches 130 mm wide 11 inches 279 mm deep Shipping 10 lbs 4 6 kg Model 6960 A Section SECTION GENERAL INFORMATION IEN Introduction 1 2 This is an operating and service manual for the Model 6960 A DC Power Supply This manual is applicable only to instruments with the prefix number shown on the title page except as modified by change sheets 1 3 Instrument identification 1 4 Hewlett Packard instruments use a two section eight digit serial number that is 000 00000 The first three digits are an identification number the last five digits are the instrument serial number If the identification number on the instru ment does not agree with the identification number shown on the manual title page ge there are differences between the manual and instrument These differences are TT described in manual change sheets having the proper identification number 1 5 General Decription 1 6 The hp Model 6960A DC power supply produces a regulated DC voltage conti nuo
52. rs on Option 01 only In Section VI Replaceable Parts hp STOCK NO C9 to C C fxd cer preferred value 0 0082uF 500VDCW 0120 0082 R5 R fxd to 330 Ohm 5 2W 0692 3315 R6 R fxd to 360 Ohm 5 2W 0692 3615 R43 to R43 Rifxd comp preferred value 6 8 Ohm 5 0 25W 0685 0685 the Reference Designator of S2 to SW2 R44 R fxd 47 Ohm 0 25W 5 0684 4701 connected in series with CRI3 in Section V Figure 5 4 Circuit Diagram RAS connected in series with CR16 17 part may be omitted Jan 29 1968 Pago 1 IINE HEWLETT VW PACKARD ELECTRONIC INSTRUMENTATION SALES AND SERVICE UNITED STATES ALABAMA P 0 Box 4207 2003 Byrd Spring Road SW Huntsville 35802 Tel 12051 881 4591 TWX 810 726 2204 ARIZONA 3009 North Scottsdale Road Scottsdale 85251 Tel 602 945 7601 TWX 910 950 1282 232 South Tucson Boulevard Tucson 85716 Tel 602 623 2564 TWX 910 952 1162 CALIFORNIA 3939 Lankershim Boulevard North Hollywood 91604 Tel 213 877 1282 TWX 910 499 2170 1101 Embarcadero Road Palo Alto 94303 Tel 1415 327 6500 TWX 910 373 1280 2591 Carisbad Avenue Sacramento 95821 Tel 916 482 1463 TWX 910 367 2092 1055 Shafter Street San Diego 92106 Tei 714 223 8103 TWX 910 335 2000 COLORADO 7965 East Prentice Englewood 80110 Tel 303 771 3455 TWX 910 935 0705 CONNECTICUT 508 Tolland Street tast Harttord 06108 Tel 1203 289 9394 TWX 710 425 3416 111 East
53. s semiconductor silicon silver slide special stainless steel split ring steel tantalum time delay toggle titanium tolerance trimmer traveling wave tube micro 107 variable de working volts with watts wirewound without Model 6960 A Section VI Table 6 1 REFERENCE DESIGNATION INDEX Reference hp Designation Stock Description Note No C 1 0180 0502 C FXD Elect 500 uF 29 VDCW C 2 thru 0180 0518 C FXD Elect 1000 uF 31 VDCW C 3 C 4 0180 0049 C FXD Elect 20 uF 50 VDCW C 5 0150 0012 C FXD CER 0 014F 1000 VDCW C 6 0180 0032 C FXD Elect 10 aF 10 VDCW C 7 see C 4 C 8 0180 0131 C FXD Elect 150 uF 63 VDOW C 9 0150 0082 C FXD CER 82004F 500 VDCW CR 1 thru 1901 0026 Diode Silicon CR 11 CR 12 1901 0025 Diode Silicon CR 13 thru 1901 0033 Diode Silicon CR 14 CR 15 Not assigned CR 16 thru see CR 12 CR 18 CR 19 see CR 1 CR 20 1902 0048 Diode Zener CR 21 1902 0057 Diode Zener CR 22 see CR 1 DS 1 2140 0015 Lamp Neon F 1 2110 0019 220 V Fuse cartridge 0 4 Slow blow F 1 2110 0020 110 V Fuse cartridge 0 8 A Slow blow J 1 1251 0148 Connector Power J2 1510 0503 Binding Post Red J 2 1510 0009 Binding Post Black M 1 1120 0513 Meter Ampere M 2 1120 0512 Meter Volt P 1 thru see W 1 P2 see List of Abbreviations in introduction to this section 6 2 m A A A PR Model 6960 A Re
54. s 03888 Pyrofiim Resistor Co inc Cedar Knolls N J 03954 Singer Co Diehi Div Finderne Plant Sumerville N J 04009 Arrow Hart and Hegeman Elect Co Hartford Conn 04013 Taurus Corp Lambertville NL 04222 Ht Q Division of Aerovox Myrtle Beach S C 04354 Precision Paper Tube Co Chicago Ill 04404 Dymec Diviston of Hewlett Packard Co Palo Alto Calif 04651 Sylvania Electric Products Microwave Device Div Mountain View Calif 04713 Motorola inc Semiconductor Prod Div Phoenix Arizona 04732 Filtron Co inc Western Div Culver City Calif 04773 Automatic Electric Co Northiake Iti 04796 Sequoia Wire Co Redwood City Calif O4811 Precision Coil Spring Co E Monte Calif 04870 P M Motor Company Westchester HI 04919 Component Mig Service Co W Bridgewater Mass 05006 Twentieth Century Plastics Inc Los Angeles Calif 05277 Westinghouse Electric Corp Semi Conductor Dept Youngwood Pa 05347 Ultromix ianc San Mateo Calf 00015 43 Revised May 1967 LL LIS LA rr 22888608 enn Code No 05397 05593 05616 05624 05728 05729 05783 05820 06004 06090 06175 06402 06540 06555 06666 06751 06812 06980 07088 07126 07137 07138 07149 07233 07261 07263 07322 07387 07397 07700 07910 07933 07980 08145 08289 08358 08524 08664 08717 08718 08792 08984 03026 09134 09145 03250 09569 10214 10411 10646 11236 11237 Monufocturer Address Union Carbide C
55. s the slaves acting as controlled units where each supply automatically provides an equal share of current Each Model 6960A can be used as master or slave unit The connections of the supplies have to be made in accordance with Fig 3 2 C NOTE All units must operate on the same voltage range 0 18V or 0 36V Turn on the master unit first then the slave units Each supply will share the load current and the master unit will automatically limit the voltage and the current for all units Each slave unit still maintains its own short circuit protection and should be set to a current limit slightly greater than the maximum current set on the master t unit If the slave unit was set to a current limit slightly greater than the master unit and if the slave unit was turned on first the equipment under test might be damaged by excessive current before the master unit was turned on and took over the current control Automatic Series Operation Two or more supplies may be operated in series to obtain a higher voltage than that obtainable from a single supply One unit the master acts as a control unit which controls the additional units the slaves The master will set the total output voltage with each unit contributing the same amount of voltage Any Model 6960A may be used as master or slave unit Connect the output terminals of the units so that the two terminals of the master are the most negative of all The arrangements of
56. s but they must be protected against hum pickup Run either twisted pair open wire leads e 3 4 rr PERRA Debt A A Ae AAA AAA KL ET EE 9 92 1 1 Y AAA NAAA e el Model 6960 A Section II or shielded leads if hum pickup is severe Connect the leads to the sensing terminals 5 and S on the rear of the instrument At the load attach these leads across the load Remove the shorting link between and S and and S CAUTION Do not operate the instrument with the sensing leads open Be sure to observe polarity when making these connections Wrong connections may damage the supply If the instrument is operated in this manner the maximum output current decreases at a rate of approximately 8 per every 100 M9 of resistance in the minus load lead E leen a EE dd RR svereereneeeggrgteterrnstri 442 1 2813125000430 0 anrnngtdi 1d ii E e EE EE EE EEN 2 TITT Cua ee 3 Tim Model 6960 A Section II FRONT REAR FRONT REAR MASTER GE D AS S Al A2 A3 5 A4 o o o o o o ER da a E A4 o o a Normal Operation o j x S SS SLAVE b Auto Series Operation for 2 Units FRONT REAR FRONT REAR AS S Al A2A3 5 A4 A5 S Al A2 A3 o o o o d LF 09321359 wes SPY Go wa o o SLAVE c Auto Porallel Operation for 3 Units d Auto Series Operation for 3Units FRONT REAR m AI AAA A A5 S A A2 A3 o S A4q s cL MS ONE e Remote Programmi
57. t the dc output shows no voltage or excessive voltage with high ripple check all voltages produced by the auxiliary and reference voltage supply These voltages should be at ratings shown in the schematic diagram and should not exhibit significant changes while varying the input line voltage If all of these voltages are operating properiy iie trouble lies in the amplifier loop Check each transistor of the amplifier incl cing the diodes CR 13 and CR 14 as well as the front panel potentiometer R 40 VOLTAGE ADJUST Some symptoms indicate with high degree of probability that certain components may be faulty Refer to the trouble localization chart below Table 5 2 Trouble Localisation chart Symptom Blown Line fuse Primary circuit of T 1 T itself CR 1 to CR 10 Coto 3 Either 18 V or 36 V range i Push button switch only is working properly R7 R 10 R39 AB Q5 Excessive short circuit current Poor current limiting CR 20 CR 21 R 40 8 07 614 093 CR 21 Q6 Q4 Poor stability of output voltage Poor load regulation Poor line regulation After replacing faulty components carry out the performance test according to para graph 5 7 and if necessary the adjustment procedure according to paragraph 5 9 s sebarnmumnr m l mg emmmrm emmmeng emp eue gun umm Ee a emeng m ng emmmer ms 2 SHOWN IN POSITION TY AMMETER Een m cw l ADJUST Section V
58. ton Ohio Union Swilch and Signal Div of Westinghouse Air Brake Co Pittsburgh Pa Universal Electric Co Owosso Mich Ward Leonard Electric Co Mi Vernon N Y Western Electric Co Inc New York N Y Weston Inst Inc Weston Newark Newark N J Wittek Mig Co Chicago lil Revere Woliansak Div Minn Mining amp Mfg Co St Paul Minn Allen M g Co Hartford Conn Allied Control New York N Y Alimetal Screw Product Co inc Gaiden City N Y Atlantic India Rubber Works inc Chicago Ill Ampernte Co Inc Union City N J ADC Products Inc Minneapolis Minn Belden Mig Co Chicago ili Bird Electronic Corp Cleveland Ohio Birnbach Radio Co New York N Y Boston Gear Works Div of Murray Co of Texas Quincy Mass Bud Radio inc Willoughby Ohio Camioc Fastener Corp Paramus NI Cardwell Condenser Corp Lindenhurst L 1 N Y Bussmann Mig Div o McGraw Ed son Co St Louis Mo Chicago iH Pico Rivera Cali Chicago Condenser Corp Call Spring Co Inc 43 Revised May 1967 MM ERR Code No 71450 11468 11471 11482 11590 71616 71700 11707 11744 71753 71785 71984 12136 72354 72619 12656 12699 72765 72825 72928 72964 72982 13061 73076 73138 13293 73445 73506 73559 73586 73682 73734 73743 73793 13846 13899 73905 14276 74455 74861 74868 74970 75042 75378 75382 75818 75915 76005 76210 16433 16487 76493 76530 76545 76703 76854 77068 Monu
59. uired to obtain reliable test results are listed so that other equip ment with equivalent specifications may be used siur DESEE Ens EE Model 6960 A Instrument Type AC Voltmeter DC Volt Ammeter Oscillator Variable Trans former Load Resistor Differential Voltmeter Table 5 1 Recommended Test Equipment Required Characteristics Accuracy 3 Floating input Accuracy I Voltage 2 96 Current 100 Hz to 100 kHz Distortion 0 5 o Monitormeter volt resolution and I accuracy Variable Resistor 150 O 50W 10 mV range necessary 5 7 Performance Test Use Measure ripple Measure voltage and current Measure internal impedance Change AC input voltage Load for mea suring ripple regulation etc Measure load and line regulation Section V Instrument Recommended Model 403B de Model 412A Model 200C or Model 202C Any available variable transformer with monitoring meter Any resistor or combination of fixed resistors Model 740A 5 8 Before attempting to trouble shoot this instrument make sure the fault is with the instrument and not with the associated circuit under test The performance test will enable you to determine this without having to remove this instrument from the ca binet Be sure to perform this test before disturbing any ot the internal adjustments of the instrument This test may also be used as an incoming inspection
60. ullinkatu 11 P O Box 10153 Helsinki 10 Tel 61 133 Cable INTO Helsinki FOR AREAS NOT LISTED CONTACT Hewlett Packard S A 54 FRANCE Hewlett Packard France 2 rue T te d Or Lyon 6 Rh ne Tel 52 35 66 Hewlett Packard France 150 Boulevard Massena Paris 13e Tel 707 97 19 Cable HEWPACK Paris GERMANY Hewlett Packard Vertriebs GmbH Lietzenburger Strasse 30 1 Berlin W 30 Tel 24 86 36 Hewlett Packard Vertriebs GmbH Herrenberger Strasse 110 703 B hlingen W rttemberg Tel 07031 6971 Cable HEPAG Boblingen Hewlett Packard Vertriebs GmbH Achenbachstrasse 15 4 D sseldorf Tei 68 52 58 59 AFRICA ASIA AUSTRALIA AUSTRALIA Hewlett Packard Australia Pty Ltd 22 26 Weir Street Glen iris S E 6 Victoria Tel 20 1371 4 lines Cable HEWPARD Melbourne Hewlett Packard Australia Pty Ltd 4 Grose Street Glehe New South Wales Tel 211 2235 211 2888 Cable HEWPARD Sydney snow nited Electricals Ltd P O Box 681 Yahala Building Staples Street Colombo 2 Tel 5496 Cable HOTPOINT Colombo ETHIOPIA African Salespower amp Agency Private Ltd Co P O Box 718 Addis Ababa Tel 44090 Cable ASACO Addisababa HONG KONG Schmidt amp Co Hong Kong Ltd PO Box 297 1511 Prince s Building 10 Chater Road Hong Kong Tel 240168 232735 Cable SCHMIDTCO Hong Kong INDIA The Scientific Instrument Co Ld 6 fe Bahadur Sapru Road Allahabad 1 Tel 2451
61. usly adjustable from O to 36 V up to a current of 300 mA or from 0 to 18 V up to a current of 600 mA according to which range has been selected by means of the front panel push buttons The supply makes load circuit performance independent of external power supply influences has very low source impedance and excellent regulation against change in line and load This supply is especially useful as a source of power for transistor circuits because it features a protective circuit which electronically limits the maximum ourput tenes sang 1 1 Model 6960 A Section 1 current to values selected by a front panel control Accidental damaging of expensive components by excessive current can thus be reduced to a minimum if the CURRENT LIMIT control is set to a value just above the normal operating current of the external circuit Another important application of the Model 6960A Power Supply is in electronic test systems where various fixed voltages have to be produced sequentially with a high degree of reproducability This can be achieved because the output voltage of this supply may be programmed by an externally connected fixed resistor or a series of same The output voltage will then be pro portional to the value of this resistor changing the resistor in predetermined steps will have corresponding effects on the output voltage Both output terminals of the power supply are insulated from chassis ground Either terminal may be grounded as

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