HP-6960A-Manual 电路图.pdf

《HP-6960A-Manual 电路图.pdf》由会员分享，可在线阅读，更多相关《HP-6960A-Manual 电路图.pdf（40页珍藏版）》请在收音机爱好者资料库上搜索。

1、 HP Archive This vintage Hewlett Packard document was preserved and distributed by www. Please visit us on the web ! On-line curator: Martin Fischer RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 06960-90002 OPERATINGANDSERVICEMANUAL MODEL6960A DC POWERSUPPLY Serials Prefixed: G604 Copyright Hewlet

2、t Packard GmbH 1964 7030 Btlblingen, HerrenbergerstraBe110,W.Germany Prinleo8/87 RadioFans.CN 收音机爱 好者资料库 i Model 6960 ATableofContents ListafIllustrations and Tables TABLEOFCONTENTS Section Introduction. Instrument Identification GeneralDescriptiono.oo.o,. 1-1 1-1 1-1 1-1 GENERALINFORMATION 1-1 1-3

3、1-5 IIINSTALLATION .0. 2-1 2-1 2-3 2-5 Inspection. Power cabIe,. 115 Vor230 V Operation. 2-1 2-1; 2-1 Remote Sensing. Operating Controls. Current Limit Control. Connections to Load. Automatic Parallel Operation. AutomaticSeriesOperation. Remote Programming. 3-1 3-1 3-1 3-3 3-3 3-3 3-4 3-4 OPERATING

4、INSTRUCTIONS 3-1 3-3 3-5 3-7 3-9 3-11 3-13 III 4-1OverallBlock Diagram. 4-3CircuitDescription IV PRINCIPLES OF OPERATION.4-1 4-1 4-1 MAINTENANCE. Introduction GeneralMaintenanceInformation Test Equipment Required. PerformanceTests. DetailedTest Procedure. V 5-1 5-3 5-5 5-7 5-9 5-11Trouble Shooting .

5、 5-1 5-1 5-1 5-1 5-2 5-5 5-8 Introduction. OrderingInformation VIREPLACEABLEPARTS 6-1 6-4 .6-1 6-1 6-1 Model 6960 A Number TableofContents ListofIllustrationsandTable LISTOFILLUSTRATIONS Measuringline,load. Operating Controls. . Terminal Connections00 Model 6960A Power Supply 1-1 3-1 3-2 4-2 5-1 Blo

6、ck Diagram . . 1-1 3-2 3-6 4-1 5-4 5-2 5-3 5-4 5-5 Number 1-1 5-1 5-2 RegulationandRipple MeasuringACInternal Impedance,., Recommended ConnectionsatthePower Supply Jv4todel6960 CircuitDiagram. ServicingEtchedCircuitBoards. LISTOFTABLES Specifications RecommendedTestEquipment Trouble Location Chart 5

7、-4 5-5 5-9 5-10 1-0 5-2 5-8 ReplaceableParts,. 6-2 6-2 Reference Designator Index.6-2 6-5 APPENDICE CodeListofManufacturers Manual Changes Sales Office Locations Model6960A REGULATED OUTPUT: LOAD REGULATION: LINE REGULATION: RIPPLEANDNOISE: TEMPERATURESTABILITY: TEMPERATURERANGE: OUTPUT IMPEDANCE: R

8、ECOVERY TIME: METERACCURACY: OVERLOAD PROTECTION: OUTPUT TERMINALS: REMOTE PROGRAMMING: POWER: DIMENSIONS: WEIGHT: 1-0 Specifications TABLE1-1 SPECIFICATlONS 2rangesswitchedby pushbuttonswitch 0-18V/600mA:Voltagecantinuouslyadjustable from0-18Vdc. 600mAoverentirevaltagerange. 0-36V/3OO mAlVoltagecon

9、tinuouslyadjustable from0-36Vdc. 300mAoverentirevoltagerange. Lessthan5mVchangeinoutputvoltageoverfull aperatingrange. Lessthan5mVchangeinoutputvoltagefor 10% power linechanges. Lessthan150;UVrms LessthanO. 1%;0C. Ot0550C. Lessthan0.02QfromDCto1Kc. Lessthan0.5Qfrom 1Kcto50kc. Lessthan50fJsafterachan

10、ge from full10aCltonoload. 5%offull scole.(METERSONOPTION01ONLY) OutputcurrentIimitercontinuouslyvariable from80to600mAon0-18Vrange, 40to300mAon0-36Vrange. Three banana jacksspaced3/4inchapart. Positive and negative terminals are isolated from chassis. A maximum of400 Vmay beconnected between ground

11、 and either output terminal. About200Q/Vexternal resistance applied to rear-mounted terminals. 110/220V : 10%,50to60cps,40watts. 115/230V10%,50to60cps,40watts. 6-3/32inches(155mm)high,5-1/8inches (130mm)wide,11inches (279mm)deep. Shipping10Ibs(4.6kg) Model6960A 1-1Introduction SECTIONI GENERAL INFOR

12、MATION SectionI 1-2Thisisonoperotingandservicemanual far the Madel 6960 ADCPowerSupply. This manualisapplicableonly to instruments with the prefix number shown onthe titlepageexceptas modifiedbychangesheets. 1-3InstrumentIdentification 1-4Hewlett-Packardinstruments use atwo-section,eight-cligitseria

13、lnumber,that is,000-00000.The firstthreedigitsareanidentificationnumber;thelast five digitsarethe instrumentserialnumber.Iftheidentificationnumber on theinstru- ment daes notagreewiththeidentificationnumber shown onthemanualtitlepage, therearedifferencesbetweenthe manual and instrument. Thesediffere

14、ncesare describedinmanuolchongesheets having the prooeridentificotionnumber. 1-5GeneralDecription 1-6The-hp-Model 6960ADCpower supply produces aregulatedDCvoltageconti- nuouslyadjustablefrom 0 to 36 V up to acurrentof300 rnA, or from 0 to18V up to acurrentof600rnA,accordingtowhichrangehasbeenselecte

15、dby meansof thefrontpanelpushbuttons.The supply makes loadcircuitperformanceidepencient ofexternalpower supplyinfluences,hasverylow sourceimpedanceandexcellent regulationagainstchangeinlineandload. This supplyisespeciallyuseful as a sourceofpower for transistorcircuitsbecause itfeaturesaprotectiveci

16、rcuitwhichelectronicallyli;itsthemaximvmOUTput Fig.1-1Model 6960A Power Supply 1-1 i:;mmmmmmm:;:mmmmmmmm;mmmm;mmm;m;m;mmmmm;,:i:,Fmm;mmmm;,:;,: H:;:.;.:;:;:m:;:;1:=,=:,:,:,l!I1Iil IvIodeI 6960 ASection 1 current to voluesselectedby0front ponelcontrol.Accidental damaging of expensive componentsbyexce

17、ssive currentcanthusbereducedto a minimum, if theCURRENTLIMITcontrolisset to avaluejust abovethenormal operating currentofthe externalcircuit.Another important appl icationofthe Model 6960A Power Supplyisinelectronictest systems where various fixed voltages have tobe producedsequentiallywith a highd

18、egreeofreproducability.Thiscan beachieved because the outputvoltageofthissupplymaybeprogrammedbyanexternally connectedfixed resistor or a seriesofsame.Theoutputvoltagewill thenbepro- portional tothevalueofthis resistor; changing the resistorinpredetermined steps will have corresponding effects on th

19、e outputvoltoge. Bothoutput terminals of the power supply are insulatedfromchassis ground. Either terminalmaybe grounded as high as 400 Vfromground.Itistherefore possible toconnecta numberofsupplies in series to obtain higher voltages than 36V. Ifmore current than 600mAisneeded,thereisthe possibi Ii

20、tyofoperating several power suppl ies inparallel. Remote sensingcanbe used for minimizing theeffectofsupply lead resistiance and thus providing anexactlyregulatedvoltageatthesuppliedcircuitregardless ofleadlength. 2-0 ._- Model 6960A 2-1Inspection SECTIONII INSTALLATION SectionII 2-2WhentheModel6960

21、Aisreceived,inspectitfordamagereceivedintransit. Operatetheinstrumenttomakecertainthatitisfunctioningsatisfactorily.If damageisevident,followtheproceduresoutlinedintheCLAIM FOR DAMAGE INSHIPMENTpageofthis manual (insiderearcover). 2-3Powercable 2-4Thethreeconductorpowercablesuppliedwiththeinstrument

22、isterminatedin a threeconnectormale power plug recommended bytheVDE(Verein Deutscher Elektrotechniker) WARNING Thethirdconductorgroundstheinstrumentcabinetforthe PROTECTIONOFOPERATING PERSONNEL.If0twocon- nectorlinepowerreceptacleisused,theinstrumentcabinet should begroundedexternally. 2-5115Vor230V

23、Operation , 2-6The instrumentisdesigned to work from110,115or220,230 volts10%line voltage, Itisshippedfromthe factory wired for operation from a110Vor220Vsource,Itmay be re-wired for operationfroma115Vor 230Vline by changing connection on transformer T1from4Ato 4 and from 2Ato2(seeFigure5-4),Toopera

24、tefrom220V(230V)line, setthe slide switch on the rear panel to 230V,tooperatefrom110V(115V),setthe slide switch to115V,FuseF1should be 0.4Aslow blow for220V(230V)and0,8slow blow for110V(115V), 2-1 Model6960A SECTIONIII OPERATING INSTRUCTIONS SectionIII 3-1OperatingControls Figure3-1shows the functio

25、ns ofthefront panel controls and terminals andis self-explanatory. 3-2Toturn the instrument on, pushineither of the range buttons, according to the voltage and current whichisdesired. Accidental setting of both buttons,18V and 36V,will causeno damage to the unit;inthiscasethe instrument hasbeenswitc

26、hed to the 36V - 300mArange. Pushinginthe button marked OFF turnstheinstrument off. 3-3CurrentLimit Control 3-4This knob adjusts thepeakcurrent output of the supply. The indicationisnominal. To setthe value exactly, removetheloadandshortthepower supply terminals. Adjust the.!i.m CURRENTLIMITcontrol

27、until the meter indicatestherequired maximum current.#, Ifthesupplyistobeusedinanapplicationwherethecurrentdrown fromthe instrumentisnotessentiallyunifotmwithrespecttotime,e.g.in pulsetype circuits,thenthefastactingcharacterofthecurrentlimitingcircuitmustbe takenintoconsideration.Theaveragecurrentma

28、ybewithinthesupplyrating orbelowthemaximumcurrentsetwiththeCURRENT LIMITcontrol,butpeak currentsmoybehighenoughtocausethesupplytoclip.The CURRENTLIMIT controlmust,consequently,besetto avaluewhichisgreaterthanthepeak currentrequirementsofthecircuit. Theoutputterminalsareconnectedinternallytoa200juFca

29、pacitorwhich helps supply highcurrentpeaks,providedtheyareofshortduration.Anyexter- nalcapacityaddedwillimprovethepeakcurrentcapability,butwilldecrease thesafetyprovidedbythecurrentIimitcontrol.Highrangecurrentsmaythen destroyexternalcomponentsbeforetheaveragecurrentinsidethesupply;11 increasessuffi

30、cientlytocausethelimitingcircuittooperate. 3-1 tvodeI 6960A SectionIII CABINETGROUND METER INDICATESOUTPUT /CURRENT / , / RANGE PrMPOWER OFFON o v,0,mAZol4c .II,1,1,I,/IWJe I!-_.:.0:)11-G.ISelectsmaximum I,rcurrent output VOLTAGEADJUSTCURRENTLIMIT(mA) fo oa?):600 110 I )_-J,CONNECTLOAD .0100TO(+)AND

31、(-) +r-_-,-,-Hr-TERMINALS Eltherterminalmay joeconnectedto CJloundedcClblnet terminal. L SETS MAXIMUM OUTPUT VOLTAGE METERINDICATESOUTPUT VOLTAGE7 / Fig.3-1OperatingControls 3-2 Model 6960 A 3-5Connections to Load SectionIII 3-6The load may beconnectedtoeitherthefront orrearoutputterminalsofthe powe

32、r supply as shipped fromthefactory.Sensingoftheoutputvoltageisauto- maticallyaccomplished in both modesofoperation. The user should realize that the specifications describing the electrical characteristics ofthe power supply are given for measurements made directly at the terminals.Longleads between

33、 instrument and loaddeteriorateloadregulation, whichcanonlybemaintainedwithinthespecificationsofthepower supply by using remote sensing as describedlaterinthissectionofthemanual. 3-7Automatic ParallelOperation 3-8Automaticparalleloperationas used hereisdefinedas aparalleloperationof twoormore power

34、supplies withoneunit(the master)actingas a controlunit andtheadditionalunits (the slaves)actingascontrolledunits,whereeachsupply automaticallyprovides an equal shareofcurrent.Each Model 6960Acanbe used as master orslaveunit. The connectionsofthesupplies have to be made inaccordancewith Fig.3-2C. NOT

35、E Allunits mustoperateonthesamevoltage range(0-18Vor0-36V)! Turn onthemasterunitfirst, thentheslaveunits.Each supply will sharetheload currentandthemasterunitwillautomaticallylimitthevoltageandthecurrent forallunits. Each slave unit stiIImaintains its own shortcircuitprotectionandshould be set to ac

36、urrentlimit slightlygreaterthan the maximumcurrentsetonthemasteri:; unit.Iftheslaveunit wassetto a current limitslightlygreaterthanthemaster unit and iftheslaveunit was turned on first,theequipment under test might be damaged by excessivecurrentbeforethemasterunitwas turned on and took overthecurren

37、tcontrol. 3-9Automatic SeriesOperation 3-10Twoormore supplies may beoperatedinseries toobtaina highervoltagethan thatobtainablefroma singlesupply.Oneunit(the master)actsas a control unit,which controls theadditionalunits (theslaves).The master willsetthe totaloutputvoltagewitheachunitcontributingthe

38、same amountofvoltage. Any Model 6960A may be used as masterorslaveunit. Connect theoutputterminalsofthe unitssothatthetwoterminalsofthe master are the most negativeofall. The arrangementsofinterunit connections areshowninFig.3-2b for two unitsandinFig.3-2d forthreeor moreunits. Theconnectionbeween -

39、SofthemasterandA2,A 3ofthe firstslavehas to bedonebymeansofa10K0/0.5Wresistor. 3-3 Model6960ASectionIII Priortoturn onsettheVOLTAGE ADJUSTcontrolonthemasterunitfully counterclockwiseandtheonesonallslaveunitsfullyclockwise.Then turn on allunitsandadjustthemasterunittothedesiredvoltage.Iftheslaveunits

40、do nottrackthemasterunit,turnoffallinstrumentsandrecheckyourconnec- tions. For minimumrippleacrossconnectedoutputs,adda 5/uF(orlarger)/50V electrolyticcapacitorfrom+Sto A2terminalsonallslaveunits.Allinstru- ments must beoperatedonthesamerange.Dlnotconnectmorethanten units inseriestoavoidexceedingthe

41、400Vratingfrom+or-outputterminals to chassis. 3-1Remote Programming 3-12 3-13 TheoutputvoltageofModel6960Amaybechangedbyactuatingthefront panelVOLTAGE ADJUSTcon,rolorby chong:;,llC0orthe externai programmingresistor.Ifa numberofModel6960Asareconnectedinseries orparallel,allunitscanbeconrrolledbychol

42、gi9rt;eprogrammingresistor attachedto the masterunitonly.Thustheoutputvoltagemaybeprogram- medremotelyby usingsteppingswitchestochangethevalueoftheexternal resistorinaccordancewith a programmedprocedure. Theconnectionson therearterminalstrip,showninFig.3-2ehaveonlyto be performed on the masterunit.T

43、hen theoutputvoltagewillvarylireI,: withtheprogrammingresistoratarateofapproximately200O/V,thatmeans, a2000resistor wiIIgive1 Voutput,04000resistor 2Voutput,etc. When using aswitchtochangethe programmingresistancewhi Ietheinstru- mentison,besure to useashortingcontacttypeswitchtokeepthevoltage ofthe

44、supply from risingwhileswitching.Iftheprogrammingcircuitisopened, evenmomentarily,thevoltagefromthesupply willrise.Thisswitchingtran- sientmaydamagethecircuitundertest. Remote Sensing Whentherearterminalsoftheinstrumentareconnectedinthenormalfashion, thevoltageforregulationcontrol(sensingvoltage)ist

45、akenfromtheoutputof thesupplyatthefrontpanel.Thisisnotalwaysthebestpointtoobtainthis voltage,becausetheremay be avoltagedropinthesupplyleadsbetweenthe loadandthesupply. Togetaroundthiseffect,aseparatesetofterminalsforthesensingvoltage (+Sand-S)areprovidedontherearoftheinstrument.Theseterminalspermit

46、 aseparatepairofleadstoconnectatthe loadtosupplythesensingvoltage. The leadscarryno loadcurrentbutareinsidetheregulationloopofthe amplifier. Touseremotesensing,run aseparatesetofleads fromtheload tothesensing terminals.Theseleadsdonotneedto be asheavyasthesupplyleadsbutthey must beprotectedagainsthu

47、mpickup.Runeithertwistedpairopenwireleads 3-4 ._- -._.,.,., .,.,.,.,.,.m. Model6960 A SectionIII orshieldedleadsifhumpickupissevere.Connecttheleadstothesensingterminals+5 and-5ontherearoftheinstrument.Attheload. attachtheseleadsacrosstheload. Removetheshortinglinkbetween(-)and(-5)and(+)and(+5). CAUT

48、ION Donotoperatetheinstrumentwiththesensing leadsopen.Besuretoobservepolaritywhen makingtheseconnections.Wrongconnections maydamagethesupply. Iftheinstrumentisoperatedin this manner,themaximumoutputcurrentdecreasesata rateofapproximately8%perevery100MQofresistanceintheminusloadlead. 3-5 ,;m;,;:;:i1!;il Model6960A SectionIII FRONTREAR ferhI FRONTREAR A5-5AI42A3+5+A4 IMASTER o0 r-0u 00 0 .0.5-S