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Contents

Tt,,,,t Muitimeter Hewlewpackard PrintedAPRIL ManualPartNo MicrofichePartNo Tableofcontents C0NTENTSGontd RABLEOFCONTENTSCont,d Listofillustbations Frz Diagram Äl,il ?7l+eatic ?rorrACAdiGüffi PorariryR,tüä SPECTFtCATI0NS 12ACCESSORIES.AVAITABLE1lNTBoDucTl0N 0PT0NS 14INSTBUMENT.AND Manualidentifica T I O N Lo . t 35+o . os +o . o2s O07 .oo5 Contd SpecificationsOo7 .005 .0m 8 1 5 0 24hours23o 10c SpecificationsCont,d00fiv 1000.0v Dvs/H DVs/uSectionI Model34904 GenerallnformationContd Vin = vs/H rl NTR0DtCTloN REc LsolatedData0utput0ption021-hp-111ZlAl InstallationINSTALLATION.OFOPTIONS BenchUse RemoteGontrol0ption022 Option050andOption06029INTERFACE.CONNECTIONS Data0utput0ption021 OPTtoN021 Fc öSectionII Model34904 7N i 3i -s t** JrJü,1t = ! 9 i l REMOTEINPUTCONNECTORJ75 E E i F = = 2H* F EI = 6 s i ä 2 qd E ? 3 5 fr i F 3 ä 10631A 6 3 1 10631C RearInputGeneralPurposelnterfaceBusConnections Cablepart NO. Length Outguard GeneralPurposeInterfaceBusConnectorsGPIBBUSCONNECTORJl2 9 9 f Sample/HoldConnections,0ption040/045 TriggerConnections,GPIB0ption030 D e l 3 4 9 0 a For J7 is -hp- Part No -0084 Amphenol S7-30360-37sRepackagingforshipment SectionIII Model3490A 15MAXIMUM.INPUTVOLTAGES WARililGInstbumentcapabilities 13FRONT.ANDREARPANELOESCRIPTION FloatingMeasurements I7 . GeneraloperatinginstructionsTurn-OnandWarm-Up Guarding SELF.TESTOPERATION Resistancemeasurements Acvoltagemeasurements 62.0hmmeterSampteRateandBesponseTime 60.0hmsSignalVoltageandCurrentOutputSignalsandLevels InputConnections Data0utputlsolation InputSignalRequirementsInputSignalsandLevels 79.0utputSignals DAC GPIBBusSignals030 SRo L l 101Talk.0nlyNoController103GPIB.Controlof3490A RÄi+ -cg- lL Asciicodecharacter Binarycode Octal Code To7AddressCodes USE ProgramCodesA R a C T E R 2 3 4 5 6 F D Ldav Printerwill Printerand 3490A349OAand Will acceptdata SetsLREN LOWon bus I X E D N I 1 JGPIB0peratingExamPle Ooü 0 f R \ r @üoü@f E \ SroP l CMD?U6 OUTPUT13,30 ..M3R7F@E 136Controlby.MarkedCardProgrammer\tD?u6,.. TlE,, . ?5V To haltprogram,press F r 349OA PRoonnvr LrrruE,irOr o o l 4 0 z o 27 l 156Guard.ConnectioninSample/HoldMeaurements 158Input.SignalLimitations160Sample/Hold.TriggerSignalRequirements 152Special.S/H0peratingGonsiderations 040 030 165Initiating.Sample/HoldMeasurementO40 O20 OtherOptions 1000v 173Using.theTrack/HoldModeTypicaltimereouiredto SETTLETO1 % 200 Measured TnputvoltageatM EO F S / HT R I G G E R Voltageactually T s 179Using.theAcquire/HoldModeV e T a Vc-vs $186.ExternalBeferenceVoltages 182Using.50Hz or 60Hz PowerSourceOptions 050or060RatioMeasrementProcedure $184.RATIOlfleasurements0ption080 Model3490A +3 . Generaltheoryofoperation ßüy4I . Intboduction LnputAttenuator DisplayRangeandFunctionControl +19 .DCANAL0GCIRCUITS +25. OCAmplifierGain SwitchingCircuitsBoottrapCircuit +23. DCAmPlifier Rt-- c-++ OtuiLs, ys SectionIV Model3490A IntegratingAmplifier IntegratorcircuitsDual-SlopeIntegration ACAttenuators L44. x 20AmplifierZercDetectAmplifier 52AC.CONVEBTEB CurrentSource HmmeterPowerSupplyOhmsconverter DisplayUnits +70 ISPLAYASSEMBLYFigureHmmeterReference InputProtection M I N G DataGounterBuffers TimingCounter R0,0m 10. Block Diagram,Main LogicASM Flow Chart Model3490A Tl-90.AlgorithmicStateMachine 11. Block Diagram,Main LogicCircuits TransferandZeroDetect Enaele P U T S Enable Oualifierinput To ROM105Input.PolarityStorage +II7 . Referencesupplies +il5. DCSWTTCHNGLoGrC + I 7 RatioMeasrements0ption080 + t Powersupplies+128 .FBONTPANELS1VITCHING G H +I32 . Self . Testfunction134Logic.Test,No.l Polarityin Ratio Measurements 4145.x .01Atten.x, 100Gain,TestNo.6 TurnoverError,TestNo.3+137.10V RangeZero,TestNo.2 +143.0.1VRangeZero,TestNo.b +158 .DATAOUTPUTOPTION021 +r9 4t74.REM0TEC0NTR0t0PTtoN022 198GPIB.System +188.ShiftRegistersLocaURemoteFlip-Flop DauFlag GPIBSystemOperation +2r 216Acquire/Hold.Mode Figwe 4-23. WaveformslllustratingAcquire/Hold Mode+212.SAMPLE/H0tD0PTl0Nll40or045 @ n z TooSample/HoldAnalogCircuits +23 TooK Ja+zRoo Compensation Lye e outpur Flgure4-27. Sample/HoldLogic Block Diagram228Sample/Hold.LogicCircuits +25 Exterml Hold H Hehs DC Amp512 615.0 1000v 124.4 154.O ExternalPage Ortoroo OruY --Jl Figurb4-30. Sample/HoldMeasurementSequence Integrator Waveformsarenot drawnto timeo, o,,rnI?ltExample of TRACK/HOLD MEA Surementseouence RIOLD A1 bHOLD B r l l I-r Gort +prr2zrs.i Qrs Sre Ero-+ 3r4 Zra Orr 10kn RecommendedTestEquipment $9. Dcvoltmeteraccuracytest TNTB0DUCTIoNRecommendedtesteouipment Performancechecks S7. Performancetests L6. PreferredMethod Performancechecks@ \ d 15OHMMETER.ACCURACYTESTS 1OO AC Voltmeter AccuracYOhmmeterAccuracy S24.ACNORMAL.MODEREJECTION PebformancechecksACCOMMON.MODEREJECTIONTEST Dcvoltmeterinputresistancetest 28AC.VOLTMETEHINPUTIMPEDANCETEST Rrr-rrr--rModel3490APERFOBMANGECHECKS O o ? 6 5 2 a @ \ - O @ @ o oTest Oscillator MU L T I M E T E R h p 3 4 9 O a + 100.000 PerfohmancechecksRATI0PEBF0BMANCE0ption 080 $38. DC/DCRatioAccuracyTests Ext Ref Nput Lnput Display Limits Range Voltage S41.AC/DCRatioAccuracyTestExternalReferenceInputResistanceTest 45GPIB.0PEBATIONALCHECK0ption030 Lo v Ranse 1000kO range It l l K oPERFORMANCECHECKSModel3490A +tll Ii tti 1üj Li i l Fä il Ir fliFj Fl IiI It I l L1,1ti R * ! i t F TRf,lIr i5i 1.+ri I i , Il Powebsupplyadjustment ProceduresAdjustment $ 51 .ADJUSTMENTPROCEOURES Dc standardhp- 7a0Bis requiredfor these Model3490AAOJUSTMENTPROCEDURESSectionVDczeroadjustments $57. Referenceadjustments $66. Ohmmeteradjustments 69SAMPLE/HO.LDADJUSTMENTS Dc standardhp- 7a0Bis requiredfor this Model3490AADJUSTMENTPROCEDURESSectionV73.0ffsetAdjustment $75. DielectricAbsorptionAdjustment Orrra AojustmentproceduresRatioreferenceadjustments Lqe ColTect Adjustmentprocedures Testrecord Perfobmance + 1 2 . O O O Performancetestbecordcontd001v r 0.oo1v LO.V l O V 1 0 00000v 10.üoo 12.0000v Performancetestrecorocontd50000v Ooooov 120000v Ext Ret Fngu V 1 0 Proprietaryparts IntboductionOrderinginformation NON.LISTEDPARTS B l e 6 1 . R e p l o c e q b l eP o r t s OtvReference HPPartNumber Description Mfr Mfr PartNumber Designation Code Model B l e 6 1 . R e p l o c e o b l ep o r t s l C o n t d lRcor-@4o Leol-m4ol\ B l e 6 1 . R e p l o c e o b l eP o r l s C o n t d OtyReference HP Part Numbel B l e 6 1 . R e p l o c e o b l eP o r t s C o n r d 28480 2a4AO QtyB l e 6 1 . R e p l o c e o b l eP o r t s C o n t d f AI R3A AIR3@ Model 3490Ä R t s l C o n t d f E p l o c e o b l eB l e6 Aterei alnz? DesignationReference HPPartNumber OtyDescription Mfr Code Mfr PartNumberB l e 6 1 .R e p l o c e o b l eP o r t s C o n t d DMT4LOON B l e 6 1 . R e p l o c e o b l eP q r t s l C o n t d lOaa+-rrtt $ Reeo-sg Aoaroassyrehotejuxper B l e 6 1 . R e p l o c e o b l eP o r t s C o n t dR5ß7 A5s4 Sli2 ?5r-orlo OtyCr r?21 CB a72l 2A480 OtvDescription Mfr Mfr PartNumber DesignationHPPartNumber Code 28aao Orzo-oo+o B l e 6 1 . R e p l o c e o b l ep o r r s C o n r dRe*-ooar lil Zroo rzaaAA B l e 6 1 . R e p l o c e o b l eP o r t s C o n t d Description Mfr Mfr PartNumber CodeReference HP Part Numbet otv Designation DrT4LOara B l e 6 1 . R e p l o c e o b l eP o r r s C o n t dC8 ?2rl C5 22at O O E B R E a K D O I I N ModeI34904T u 2 I l 5 u AI3CR8 Cableribbon R 2 rModel Section Caeleriaeon Ottgiitrdrei Isolatii Boardassy Heiioi A22API A27RI B l e 6 l . R e p l o c e o b l eP o r t s l C o n t d600 400 OBD B l e 6 1 . R e p l o c e o b l eP o r t s l C o n t dA2ARI Rfxd Cotp IOK OHX IOI L1Y Z9cl 2 e c t 429C4 29C5 OHn 1trÄ 1/4W A32RI I I P 22K otr lotI P l2K OHI lot A3IU3 Mfr Code Reference HPPartNumbet oty Description Designation 2A4AO 2S4AO 2211 2211 CBA34YI A39RA T20/o Reference HP Part NumbelB l e 6 1 . R e p l o c e o b l eP or t s C o n t d 284r0 2a+ao 2A480 28480 2g4AO 284aO B l e 6 1 . R e p l o c e q b l eP o r t s C o n t dEIlrDtrs PosT assY IcxssIs assY Xo1 HPPartNumberDescription Mfr Mfr PartNumber Reference B l e 6 l . R e p l o c e o b l eP o r t s l C o n t d l Reference HP Part Number DesignationOtvDescription Mfr Code Mfr Part Number Designator L M P l a MP1B M P l C MP1D MP2 MP3 MP4 MP5 MP6 SectionVIMP37 MP23 MP7 29500043 318x32 Powersupplychecks PbeliminarytroubleshootingACCESSF0RSERVtCtNG Troubleshootingtrees DCAmplifierChecks TableT-2. PowerSupplyJumperWires13DC.ANAL0cCtRCUtTS AZAsemblyExchange I G G E R S C O P E a T a 1 T P K , + S L O P E DCAmplifierSwitchingGircuitsNlii A N D 0 V L E V E L S O C C U R a T 21A. -to-C0NVERSt0ND CtBCUtTCHECKS 3I .INTEGRATOR Troubleshooting33AC. Convebtertroubleshooting 37OHMS. Convertebtroubleshooting Logictboubleshootingsuggestions Displaytroubteshooting Accesto Sample/HoldGircuits 65SAMPTE/HOLD.TROUBLESHOOTINGTREESExternalTriggerCircuitGheck 59SAMPLE/HOLD.SERVICING O3490-27301 2200013903490-006M 03490€6528 AmplifierZerc0ffset 75SCHEMATIC.NOTESRATIO.TBOUBLESHOOTING Truth Table Logicgatesymbols+ 5 Truth Table Nrsc SectionVII Model3490A AlphabeticalListingof 34g0A MnemonicsU 4 o t Alu401 Rexe Guspb b l Tl-l= l IaFeV-pFPage I1Lgji + Input I1glilRtl7-r2 Iai ott *nn !drp6 ltnt. rync,+.1@ ? 1 t 6 1 l 7 + T i + ? @ @@Ll?Qxl c207c2or 3ttr . n YES UiLT E Q208 Ratio INT Q2O5 t1 swith3 6 m s i 4 AITPK. + 0208 R317-1O2or 0205 Q9e +.JLRaG LfT 299A See Notes ?rSlI 14,iäFfi R7vl l 1s17-t6Ov1--t==- -l6oms LOomsF Tlrtlt Wath AnDr Llo Rd 15 ot Altrt. JFuldbo+5V Lm r . tt Tlrtlt Wath AnDr Troubl .. hoor A7Ot ?CRIOüa ll R7l7-r8 I l #lsriieo,e*lEff#ri Iub s!!h T9lt DisplayTroubleshootingTree ITa --- it L i l t lT l =LJ. L--l NVW Ru*rffifcTEv O 1 oPage O24 oo24 @24 oo24 9032 oo24 t.o24 n 4 n2.4 Lirlt?lt..it \- toresh@rArur5 aIut1 J3t,1 Lop + 60O0.xxOL Initiare 6 mre smplesDisplaysholdread + 10.oo24 €@CI6@@e#ffi Tl=lS l . l LDr s S + + 5 n-s l r +5 ms-l Otuu U.T,J,l,,t-tTtj ,o + i O 5 4 s F 2317-1 10. Logic Clock TroubleshootingTree +ft$b!too THttttffiL sl \f -Jt +1 l $E B?tr+1HHHLE r r r r r r r l 5 a L- l l---,.lUs-l Url Llt Jtr2cr Pulses \ÄÄLlj. -zooms*#ll-+l.l-r +- zoomsl 1-t.i1 Ea . fTi1i = b3mtl 2s17-26 Gig I. J?Ffi At7A2 NOI€S Tlu2, a t1u3,Arl 1o.4ßF =rFTh.-l + 5vr-r +o.cF Figare7-12.RemoteTroubleshootingTree,Option022 2717-28RtN*16t12 +s-Yml 9 0 D- 3 3 8 Start 338r Hffi3 Cauil oN . l 13. GPIBI/O TroubleshootingTree,Option030 2917-30 Öl--.le Hp Porl No O Rev . BPort No V . C D a A27KI Shoulo 8€ CLOSED.SET SAMCorrecn CABLESCORRECTLYGO. to SET S/H Sayitch to TFACK/HOLDMain CIRC-IIT8OAFO. Shouloae HOLD. M€ASURE Voltage AT T3t17-32Oft-.*l 9 0 D 3 4 3 To A2 X E I,lHp Fort No -66527 Rev.B Port No . O349O Rev . C Tote 8Ap-crtot awrcH To rRcxEogeof .AIPLIHOU TRIGGCR!G Iore Sigial G€S High 3 f r a Ffi.f-LJüJ RävnG.iir 3490-0 73317-34 Hp Pott No.O349O EXT REF TPC P U TLOW TPC A13CR6 P U T TPCLOW High G H LOW G H LOW H I G H L O W TPC+ l 0 16. Ratio TroubleshootingTree A12 A17 A22 A11 3 or A36 A34 A35 A30 A33A31 Rearof Instrument 111 € dI11 Ral Rö*et e J l +++F+r@aJj,i @ @.6r #Jälslt*tJl=l Üä,ierispgglg*@ WEE @D@@@@@ ++++++++f++Evvvvvvvvvvvv + ö EfEU 737 18 a Block Diagram CoKno FP?fäWüE,Ä,li REFEBETTCEDESIöTATIOtIS Q l LelQgLli-@@@@@@@ Ilgt,,a ,,r.i.li A R D OverloadprotectionHovpoverloaoprotectionh A M P L I F I E R Bootstrap P L I F I E RT6azt RuorerzV AA ? z e 1 2 z \+lFeedbackattenuator Zl-----l $E?Z r z l 391740 IRrr5- l .FrrBll- l Pt lP r f 9i czo1@$Y@ Y 6ö Ff$$**H++ ?o70 f C203 o.33 Lp/0 Al I MArNcrRcurrassEMBLYo34so 6650r +ov +rovFRoM Sv---*-l---5v SueeLv +rzV ----d-tr-E +tzv +5V +5v TZV TZV ---b T7v- t7v CR202 1411742Zero Detect Rblhb-l- --,1 Faq h-,,dnTf,rl XPf*trt*r+9e . E ?-rv FfieOtt,t Itu Figr F E R E N Cpeo L a R I T YL O G I C+REFERENCESUPPLY V E R T I N G P L I F I E R V E R T I N G 7431744U3o! ----t F E R E N Cpeo L a R I T YL O C I C ?ääijO * 9sö $ ß?i-,- *$1,sE1iVRrr Nililji Llt ri.ä-i.i Ffi 3 1 6 t Powerfrom -5v---dä-!-- IP*333O*. n i!g!?ifiJjscaNBH Timingcounter \------lJ7451 Siorra Äiiiirr lir,il..1 Ilir ! o @ @, = T-T P .L.iU.B Ll 11I3g.i Stir lT- Il R N O N C L E a R R C U I T I3Bl,J-rRua --I xma Nne--r LHur Röüärrrr-l 3bEi,?# Otonrä FRoMU6iIä?5Silij L o P U T L a RIT Y Storage Tansferenableh F R O MU 9 2L8d,tshäl 3Yä1..dP A N S F E RA N D Z E R O D E T E C T @@@@@@@*späsw Pp* @@@@@@@@@@@@Il J E i i + + i + Fää-.trto-*tot IlJ**io**l.Io,l6ffi-l Lffioi Fs-rLErHoLDpi6il-l Soue.e,.oloieftil-lSoupr-Ezro-r-oirfr 74917-50 \ R l + q r\ 9 t r l = l Hp PortNo O 220V Toov T20v 240V Rr,rorHERIg t31,.9uIGgARo Grppry Optrorr Assr Ozot OuiroRegulator TOAa 3OV Regulator 5117-s2+ l 7 v Regulator +3OV Regulator BCD Hp Port No.O349O-66503REV . B Polaritydisplay EnableRoaru4oreil =i33SfTHr-+ Scan Decoder Polaritydisplay EnableU4,uro A N N E R a T O R Ra FE FA FB Figwe 7-27. SchematicDiagram,Display, A3Io*F S3l7-s4 R C U I TS I D E = EComponentside R*.,j# S l r q r lQ N a e r , *I .l ,*l ,i , ,ElllRANGEIH**iL Ror..RArEcH,rrr., tfl*l Test Ss -s6LFaN6E-l s4 LFUNcroNl L-sJ =sÄl---l+ + 6 D Ll l +tzv ---fre- +rzv r l +5v --+r5- +5v A6T* .* r*.* *-..uV, cK+ + r 7 OotAttenuator Converteramplifier Nc corvepreR ourPUT1 Figwe 7-29. SchematicDiagram,AC Converter,A6S7l7-s Filter UeacpalpueHuoll3as Drluod O6t9O-20999Ofqlrod 06t90-O999-l GttornrvsnHounor Rsnxo Ei-trIfl3?5fö*co,c Flt Bl,,J.li,i Vrx Norlrr,rn CNn.Norr vH Ssoucv 39N lmdNt Arn8rg Crlerueqcs Surq6 Urur8erq RelJouoJrV 0vLl6sLN3UUnC l3unos U3t3NltHO33N3U3J3U A22Al ? ? T42242 +l8oyJl,flylo 1M1 ASSEMBLY 3äYäiäT?lTl-?.1..iFff.ItTrsGooo +l--.r Rxrnrr Tl,,t1 SAMPLE/ Hold Triggercircuit Ro ooroorrr coNNEcroRJ6 Ro *.or. ,*r* coNNEcroRJ7 7411142Wro +f-!-l-tr-ourcuaRo 5 a L J J lÄlll Ur-l Freque ÄX?,3,.oLEoR Eon Fil!Täläf Q U E N T I ALO G I C Outguard Logtc Clock FrequencydoublerdelayData Multiplexers +-n 2eI # , . , J9 \ I C E N I a N ri fr. F DAraFLAG Guaro I G a N E+5vr---1i1+4 W S H I F TR E G I S T E R S 74317-64 + 4 lOi---qo Zfu*-rrot Oo-1 Al2 Hp porttJo,03490-66512 At77 a LOCAL/REMOTE + sLO REMoTEnruruurrcraron LOCAL/ Remote FLIP- Flop RHs tl su31sr93u = r FlIto*.- -7u u5 LockdelayAJtlilo-*il1.iI 91 .-Ct Ouvngmo l,ssv \ .,- I \ Onr9nvu0 rdtIlnn-u3x3Rns+ NBId Z r To A2 C D E F H J K L Hp Port No T8 iäB?i F8fi814,0o*%ÄäuJJii L8 PRbou%u Will 8E Loadeddown R c * o lI l r g SIf U8 is BAD.OUTPUTWAVEFORMS 46.4 K ? * t o RrreenrroR ?? l9Li9i.-.?747l7-68 Rt\u €l-----19 U l HPorf No . O349O Rev . C O 1 OriIäo*,j.,lj!,j TABu?,.ffiIi Hmtb Bs-uM P L E /H O L D T R I G G E R CI RC U I T S A L I F I E R M U L T I P L E X E R 74917-70 ?.46,f?6Tr%r,i SDo JilCRs OEo o r a o r B orc o r o o t M I N E To S/H Logic Ouoorn REcErw DislayCOPYRIGHTt973 by Hewlett Packaro LOCAL/REMOTE $ Ection Aage Clocks 5 Lines FC Company 36.BlockDiagram,3490AGPIBVOCircuits 7117-72 N D L24-----r3-l Or5Hp Port N o . O 3 4 9 O 6 6 5 3 4 R e v .A Hp Porr N 0 3 4 9 0 6 6 5 3 6 Rev a RvrrxrJNorroNnr Rfillj TotOrurr9iorrrol98rfiilV RnvH ornv H Or6rnrv CucxJ Rvu . 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HP Car 3490A manual I1Lgji

Models: Car 3490A

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