Solid State DC Voltage Standard Calibrations

1 Page 1 NBSMeasurementServices: Solid-StateDCVoltage StandardCalibrations BruceF.Field U.S.DepartmentofCommerce NationalBureauofStandards Open at page → 2 Page 2 CenterforBasicStandards TheCenterforBasicStandardsdevelopsandmaintainsthescientificcompetencesandlaboratoryfacilitiesnec- essarytopreserveandcontinuetorefinethebasephysicalquantitiesuponwhichtheNation'smeasurement system... Open at page → 3 Page 3 NBSMEASUREMENTSERVICES: Solid-StateDCVoltageStandardCalibrations BruceF.Field CenterforBasicStandards NationalMeasurementLaboratory NationalBureauofStandards Gaithersburg,MD20899 January1988 U.S.DEPARTMENTOFCOMMERCE, C.W... Open at page → 4 Page 4 LibraryofCongressCatalogCardNumber:87-619904 NationalBureauofStandardsSpecialPublication250-28 Natl.Bur.Stand.(U.S.),Spec.Publ.250-28,39pages(Jan.1988) CODEN:XNBSAV U.S.GOVERNMENTPRINTINGOFFICE WASHINGTON:1988 Forsalebyt... Open at page → 5 Page 5 PREFACE Calibrations andrelatedmeasurementservicesoftheNational BureauofStandardsprovidethemeansformakersandusersof measuringtoolstoachievelevelsofmeasurementaccuracythat arenecessarytoattainquality,productivityandcompet... Open at page → 6 Page 6 Thenewpublicationswillpresentmoretechnicaldetailthanthe informationthatcanbeincludedinNBSReportsofCalibration. Ingeneraltheywillalsoprovidemoredetailthanpast publications inthescientificandtechnicalliterature; such publi... Open at page → 7 Page 7 TableofContents page ListofFigures vi ListofTables vi Abstract 1 1.Introduction 1 2. DescriptionofService 2 TypesofStandardsAcceptedforCalibration 2 ShipmentofStandards 2 CalibrationProcedures 2 3. CalibrationApparatusan... Open at page → 8 Page 8 ListofFigures Figure page 1. Blockdiagramofthedcvoltagemeasuringsystem 3 2. Simplifiedwiringdiagramofthemeasuringsystemset uptocompareastandard-under-test tothecalibrated resistivedivider(TransferReference) 6 3a. Page1of... Open at page → 9 Page 9 NBSMEASUREMENTSERVICES: SOLID-STATEDCVOLTAGESTANDARDCALIBRATIONS BruceF.Field Abstract:ThisdocumentdescribestheproceduresusedatNBStocalibrate solid-statedcvoltagestandardsintermsoftheU.S.LegalVolt.Theprocess involvescali... Open at page → 10 Page 10 2.DescriptionofService TypesofStandardsAcceptedforCalibration NBSoffersacalibrationserviceforsolid-statevoltagestandardsthatare completefunctioningstandardswhichcontinuouslyproducetheoutput voltagestobemeasured.Wedonotac... Open at page → 11 Page 11 fective.Onlythestablereadingsareusedforthefinalvaluesinthecalibra- tionreport. 3.CalibrationApparatusandMeasurementApproach SystemDescription ThesystemusedatNBStocalibratesolid-statevoltagestandards isspe- ciallydesigned... Open at page → 12 Page 12 alconnectiontoa16Mbyteharddiskwhichiscommontoseveralmeasur- ingsystemsinthelaboratoryandwhichisusedforprogramanddatastor- age.Thefloppydisksystemisusedforbackupdatastorageinadditionto themainstorageontheharddisk. Alsonot... Open at page → 13 Page 13 DigitalVoltmeter A6-V2digitDVMwith0.1uVresolutiononthe0.1-Vrangeisusedasthe systemvoltmeter.Thevoltmeterisprogrammedandreadbythecomputer. AllvoltagesaremeasuredbytheDVMinboththeforwardandreversedi- rectiontocanceloffsetv... Open at page → 14 Page 14 second"calibration"oftheTransferReferencereducestheerrorcausedby anydriftintheReferenceduringthemeasurements. Thelow-thermal scannerswitchisusedtoconnectthestandard cellsandsolid-state standardstothemeasurementsystem. di... Open at page → 15 Page 15 ThelinearityoftheDVMischeckedasnecessary,butthegainoftheone voltrangeoftheDVMiscalibratedeverytimemeasurementsaremadeby measuringthe1.018VdevelopedacrosstwooftheresistorsintheTransfer Reference;typicallyresistorsRiandR2a... Open at page → 16 Page 16 assignedauniqueIDnumber,usuallyasubsetoftheserialnumber,and thisisenteredintoalogbookalongwiththedateandtheconditionofthe standard.Measurements arebegunthedayafterthearrivaloftheunit. Afterthetestiscompleted,theclientisn... Open at page → 17 Page 17 Measurements arestartedbysettingtheDVMtothe0.1-Vrangeand shortingtheDVMinputtodischargetheinputcapacitance.Thentheten 1.018-VoutputsoftheTransferReferencearecomparedtotheWorking GroupCcellemfsusingtheredundantmeasurement... Open at page → 18 Page 18 ZENERMEASUREMENTLOGFOR: 9SEP1987 [1.0] WEEK :8737 RUNFILE: RUNFILEA: ,700, 1 08:03 DESIGN: (2800 -Zener ) Zener=7970.159 SD= .022 08:35 Zenermeasurementcompleted--Set1 09:05 Zenermeasurementcompleted--Set2 09:35 Zenermea... Open at page → 19 Page 19 page2 ZENERCALIBRATIONSUMMARYFOR: 9Sep1987 ZenerID Voltage Std.Dev. (volts) (ppm) 188/1 9.99999654 .145 188/2 1.01813796 .220 C5950/1 9.99999937 .006 C6015/1 10.00000245 .002 5027/1 10.00002831 .004 5027/2 1.01799749 .01... Open at page → 20 Page 20 ThecomparisonsoftheTransferReferenceto2800(WorkingGroupC)are summarizedundertheheadingREFERENCECELLSTATISTICS. The standarddeviationsarethestandarddeviationsofasingleobservationfrom theredundantmeasurementdesign[3].Theem... Open at page → 21 Page 21 5007/1 ., 5007/2 .; 5007/3 . QO O o-o-o--O- u u -O-Or-O- - - Jo.2 ppm • m — — • -x • I 1.01800012 1.00000345 0 2 4 6 8 10 12 14 16 18 Days Fig.4.Thethreevoltageoutputsofatypicalsolid-statestandardsentto NBSforcalibration... Open at page → 22 Page 22 TABLEI Uncertainties intheFinalAssignedValue SourceofUncertainty 1std.dev.estimate (ppm) DVMgainuncertainty 0.020 DVMlinearityuncertainty 0.062 DVMleakage/biascurrents 0.023 Standardcellleakagecurrents 0.006 Scannerswitc... Open at page → 23 Page 23 TwosetsofDVMreadingsaretakenforeveryvoltagemeasurement(both forstandardcellsandsolid-statestandards),onewiththeinputvoltage sourceconnectednormallyandasecondwiththevoltagesourcepolarity reversedbythecrossbarscanner.Subtr... Open at page → 24 Page 24 Otherpotentialsourcesoferrorincludeuncompensatedthermalemfsin thecrossbarswitchesandintheleadstothestandardsandcirculating groundcurrentswithinthemeasuringinstrumentandbetweenthemea- suringinstrumentandtheclientstandard.... Open at page → 25 Page 25 ClientStandardEvaluation Testsforaceffectsaredoneforeachnewtypeofstandardreceivedfortest. Somemodelsofstandardsproduceadcshiftoftheoutputvoltagewhenan acsourceisconnectedtotheoutputterminals.Experimentshaveshown thatfors... Open at page → 26 Page 26 7.Bibliography 1. Field,B.F.,"NBSMeasurementServices:StandardCellCalibra- tions,"AtaZ.Bwr.Stand.(U.S.),SpecialPubl.250-24,52pages(1987). 2. Field,B.F.,"ASub-PPMautomated1-10VoltDCMeasuringSys- tem,"IEEETrans.Instrum.Meas... Open at page → 27 Page 27 AppendixA-ReportofCalibration UNITEDSTATESDEPARTMENTOFCOMMERCE NationalBuraiuafStandardr G u Ithnrxbxjrq.Mziryliind20833 REPORTOFCALIBRATION Solid-StateVoltageStandard XXXXXModelYYYYDCReferenceStandard SerialNo.1111111 S... Open at page → 28 Page 28 AppendixA(cont'd) -ReportofCalibration Solid-StateVoltageStandard XXXXXModelYYYYDCReferenceStandard SerialNo.1111111 Theseuncertaintyfigurescontainnoallowancefortheeffects oftransportofthestandardbacktotheuser.Anyvalidun... Open at page → 29 Page 29 AppendixA(cont'd) -ReportofCalibration Solid-StateVoltageStandard XXXXXModelYYYYDCReferenceStandard SerialNo.1111111 APPENDIX (valuesinvolts-NBS) Date Time 10volts 1.018volts 06/01/8710:19 10 .0000448 10180001 06/02/8710... Open at page → 30 Page 30 AppendixB-MeasurementSoftware TheREADZENprogramisageneralizedmeasurementprogramthatruns underthedirectionofanASCIItextfile(RUNFILE)andisusedtomakeall themeasurementsrequiredforsolid-statestandardcalibrations.Program EDIT... Open at page → 31 Page 31 allisinorder,theRunfilenamesontheprogramdiskaredisplayedalong withanIDnumber,a20characteridentifyingline,andthecreationdateof thefile.TheoperatormustentertheIDnumberofoneoftheRunfiles. Oncethishasbeendonethemeasurementsp... Open at page → 32 Page 32 Zener_volt$ isthepartialfilenameforresultfiles. Calculatedstandard cellresultspreface Zener_volt$witha"D"andZenerreference resultsprefaceitwithan"R".Forboth,the 2digityearanda2digitweeknumber withintheyearareappendedtoth... Open at page → 33 Page 33 separatedbyatleastonespace.Allfilesarereadusingafree-fieldformat; onlytheorderofthedataisimportant,notthepositiononanyoneline.File namesaregenerallycomposedofauniqueprefixidentifyingthetypeoffile andasuffixbasedonthedate... Open at page → 34 Page 34 nameofanexistingfileoranameforthenewfiletobecreated. Ifthe programcannotfindthefileonthespecifieddisk,itwillaskifanewone shouldbecreated.EnterYorNasappropriate. Mostoperationsarecontrolledbythefunctionkeysatthetopoftheke... Open at page → 35 Page 35 fBPRINTTEXT Printthefileontheprinterselect codefromf5. f7CAT Printacatalogofspecifieddisk. {8ENDPROGRAM Stoptheprogramwithoutsaving thefile. InadditionallthenormalH/Pprogrameditingkeysmaybeused—insert line,deleteline,ins... Open at page → 36 Page 36 611110000000000 7 1601160216031604Z1Z2Z3Z4Z5Z6Z7Z8Z9Z1 0 8 2930313219202122232425262728 9 1517191111132628210212214 103537393113134648410412414 11 1341149474541431231038363 12 132112927252141 1211018161 13 3030.0113030 1... Open at page → 37 Page 37 13 nominaltemperatureofgroup1,actualtemperatureof group1,nominaltemperatureofgroup2,actual temperatureofgroup2 14 ENDDATAcommandtoindicateendofDESIGNdataset 15 comment 16 ZMEAScommandtostartacceptingZenermeasure- mentdat... Open at page → 38 Page 38 Description: 1 month,day,year,time,observer(system)name 2 numberofcellgroups,group1name,numberofcellsin group1 ,group2name,numberofcellsingroup2 3 totalnumberofobservations,meanofreferencegroup, acceptedstandarddeviation... Open at page → 39 Page 39 rightcomponent,measurementsystemID,time, numberofcellgroups,averageDVMoffset 2 group1name,numberofcellsingroup1,nominal temperature,actualtemperature,temperature cor- rection 3 group1cellIDs 4 group2name,numberofcellsing... Open at page → 40 Page 40 2-3 string"DVM"toindicateadirectDVMreadingofoneof theresistorsoftheresistivedivider,thenumberof theresistormeasured(1-10),thereadinginuV 4-6 ZenerID,tapnumberofresistivedividertowhichZener wascompared(0-10),measureddiffe... Open at page → 41 Page 41 NBS-114A(rev.2-80) U.S.DEPT.OFCOMM. BIBLIOGRAPHICDATA SHEET(Seeinstructions) 1.PUBLICATIONOR REPORTNO. NBS/SP-250/28 2.PerformingOrgan.ReportNo 3.PublicationDate January1988 4.TITLEANDSUBTITLE NBSMeasurementServices: Sol... Open at page → 43 Page 43 THESP250SERIESONNBSMEASUREMENTSERVICES* SP250-1 SpectralRadianceCalibrations 003-003-02792 $3.50 SP250-2 FarUltravioletDetectorStandards 003-003-02810-0 $4.25 SP250-3 RadiometricStandardsIntheVacuum Ultraviolet 003-003-0... Open at page → 44 Page 44 U.S.DepartmentofCommerce NationalBureauofStandards Gaithersburg,MD20899 OfficialBusiness PenaltyforPrivateUse$300 Open at page →