系列II多功能校準(zhǔn)器用戶手冊操作指南WFuseandLineCAUTIONFORFIREPROTECTIONREPLACEWITHA250VFUSEOFINDICATEDCAUTIONFORFIREPROTECTIONREPLACEWITHA250VFUSEOFINDICATEDFUSE-FUSE-S2S3S2S3T125AT125ABasic

LinePowerLabelandSwitch

Tosettheoutput,simplypressthefollowingsequenceofkeystoselectanoutputfunctionandamplitude:Forexample,tosettheoutputto10mVdc,1mVETosetanacoutput,pressthefollowingadditionalkeys:[numerickeys][multiplier]HEForexample,tochangethepresent10mVdcto10mVac@1.8kHz,8KHTochangetheoutputbacktodc,H+AShortCalibrationIfyouarenotfamiliarwiththeCalibrator,youwillfindthatthefollowingexercisequicklyteachesyousomeimportantfrontpaneloperations.WarminguptheWhenyoufirstturntheCalibratoron,youshouldletitwarmupfor30minutes.ThisensuresthattheCalibratormeetsorexceedsitsspecifications.Exercise:RunningdcZeroDCZeroisabriefinternalprocessthatremovesoffseterrors.ThespecificationsrequirethatyourundcZeroatleastevery30days.TorundcZero,pressthefollowingsequenceofSetupMenusCalPressanykey,thenpressPtwicetoreturntonormalConnectingaTypicalconnectionsforhandheldandbenchtopmetersareshownonthenextpage.ThediagramsshowtheuseofFlukeModel5440-7002LowThermalCables.Othertypesofcablemaybeusedforthisexercise.Toconnecteithertypeofmeter,proceedasVerifythattheCalibratorison,andisinstandbymode(STANDBYindicatorlit).IfSetthemetertothelowestrangethatreads10VConnecttheshieldlead(ifyourcablesareshielded)toVGUARDontheVerifythatbothXandxareoff.PressthemiftheyareConnectthemeterinputLOtotheCalibratorOUTPUTConnectthemeterinputHItotheCalibratorOUTPUT::EX::EX:EXApplyingadcApply10Vdctothemeterbypressingthefollowingsequenceof VECheckingtheCalibratorPresss.Thetotaluncertaintyforthe10VyouareapplyingtothemeterisdisplayedontheControlDisplay(thelargedot-matrixdisplayontherightsideofthefrontpanel).Thisnumberdependsonthesettingofthecalibrationcycleandspecificationconfidencelevelinasetupmenu.Exercise:ActivatingErrorChancesarethemeterreadssomethingotherthanexactly10V.Toquicklychecktheerrorofthemeter,turntherotaryknobtoobtainameterreadingofexactly10V,andreadtheerrorofftheControlDisplay.Turningtheknobisallittakestoactivateerrormode.Whenyouturntheknob,theleastsignificantdigitishighlighted.Thisdigitchangesasyouturntheknob.Tochangeahigherorderdigit,therebyspeedinguptheadjustmentrate,press<.TheerrorontheControlDisplayisacombinationofoffset,scale,andlinearityerrors.CheckingtheMeter’sHigherandLowerTocheckthemetererrorat100Vdc,firstsetthemeterrange(ifapplicable)tothelowestrangethatreads100V.PressYO.Thissetsanewreferenceequaltotentimestheintostandbywhenitcrossesthesafetythresholdfrombelow22Vtoover22V.)Turntherotaryknobtore-activateerrormodeanddeterminethemetererrorat100V.NowpressZZ.Setthemeterrangeswitch(ifapplicable)tothelowestrangethatreads1V.errormode.Exercise:ApplyinganacThereisno“acmode”switchontheCalibrator.YouchangeadcoutputtoacbyenteringTotestthemeterat10Vat1kHz,setthemetertoread10Vac,press1V,then1KHEO.AdjusttherotaryknobforareadingonthemeterofexactlyTotestthemeter’sflatness,pressa.The0.1Hzdigitishighlighted.Press<fourtimes.Turntheknobtochangethe1kHzdigituntiltheCalibratorissetto10kHz.Pressaandturntheknobagaintocheckthemeter’saccuracyat10kHz.Eachtimeyouchangethefrequency,youneedtowaitfortheCalibratoroutputtosettle(the“u”annunciatorwillgoout).Thisendsthefrontpanelexercise.Tozerotheoutputandgotostandby,pressFrontPanelFollowingisabriefdescriptionoftheCalibrator’sfrontpanelOutputDisplay(LeftShowsoutputamplitudeandfrequency.Thetoplineshowstheactiveoutputvalueinuptoeightdigits,plusapolaritysign.Thebottomlineshowsoutputfrequencyinfivedigits.AnnunciatorsbelowtheamplitudelineontheoutputdisplayindicatethefollowingactiveOPERATELitwhenanoutputisactiveatthebindingpostsorauxiliaryamplifier.STANDBYLitwhentheCalibratorisinstandby. LitwhentheCalibratorisaddressedovertheIEEE-488 LitwhentheCalibratoroutputisphaselockedtoasignalattherearpanelPHASELOCKconnector. LitwhentheCalibratoroutputhasaprogrammedphasedifferencewithasignalattherealpanelVARIABLEPHASEOUTconnector. (Unsettled)Lightswhentheoutputischanged,andremainslituntiltheoutputsettlestowithinspecification.ControlDisplay(RightShowsdataentries,UUTerroradjustments,softkeylabels,andotherpromptsandmessages.Eachsoftkeylabelidentifiesthefunctionsofthesoftkeythatappearsdirectlybelowit.Allofthesoftkeylabelsthatappearonthedisplayatoncearereferredtoasamenu.Whenyouaccessthefunctionprovidedthroughthesoftkeys,youopenupothermenus,containingnewsoftkeylabels.DisplayScreenBoththeOutputandControldisplaysblankautomaticallyafter30minutesofinactivity,unlesstheCalibratorisinoneoftheoperatingstatesthatoverridesthescreensaver.Ifthescreensaverhasactivated,youcanrestorethedisplaybypressingC.Pressinganotherkeyorturningtheknobrestoresthedisplayandperformsthecommandsentbythekeyorknob.ThescreensaverdoesnotifanypartoftheSetupmenuisduringremoteduringcalibrationorwhenanerrormessageisFrontPanelTogglestheCalibratorbetweenoperateandstandbymodes.Instandbymode,theOUTPUTbindingpostsareinternallydisconnectedfromtheCalibrator.TheCalibratorpowersupinstandbymode.5700A與5720A多功能的高精度校準(zhǔn)器，專門設(shè)計(jì)用于滿足電學(xué)校準(zhǔn)工作的需求。產(chǎn)品可輸出交直流電壓、交直流電流和電阻。寬帶電壓選件交流帶寬從10Hz到30MHz。兩款產(chǎn)品均可與5725A以及52120A系列放大器兼容。兩款產(chǎn)品均可通過MET/CALPlus校準(zhǔn)軟件實(shí)現(xiàn)自動(dòng)化。主要技術(shù)指標(biāo)功能范圍5700A最優(yōu)的1年指標(biāo)直流電壓0到±1100V±7.0ppm交流電壓220μV到1100V,10Hz到1MHz±75ppm電阻0到100MΩ按×1和×1.9的序列共18個(gè)值±12ppm直流電流0到±2.2A(使用5725A時(shí)到11A)±50ppm交流電流9μA到2.2A(使用5725A時(shí)到11A)10Hz到10kHz±140ppm寬帶交流電壓選件300μV到3.5V,10Hz到30MHz±0.4%CableOutputCableDCACVoltage10ACCurrent2A,10DCCurrent2ALowThermalEMFTestLeads(5440A-7002)ortwistedshieldedACVoltage>10SENSE/GUARD:TriaxialcableorTwinax(e.g.,Alpha2829/2).OUTPUT:Or:SENSE:Coaxial,OUTPUT:CoaxialGUARDLead:SeparateACCurrentwithTriaxialWideband3feet(1m)50coaxialcablewithType“N”maleconnectorsuppliedwiththeoption.A50feedthroughterminatorisalsosuppliedforconnectingtometerswithimpedancehigherthan50.Voltage-BoostedOutput,5205Aor5215AUsethecablesuppliedwiththeVoltage-BoostedOutput,LowThermalEMFTestLeads(5440A-7002).(OutputisattheCalibratorfrontpanel.)Current-BoostedOutput,5725A,5220A16-gaugeorheaviertwisted-pairinsulatedwire,a