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1、INTERNATIONA1.STANDARDISO4266-4editionSecond2023-07PetrO加Umand1.iquidPetrO加UmproductsMeasurementof1.eve1.andtemperatureinstoragetanksbyautomaticmethods一psyirementoftemperatureinatmospherictanksParo1.eCtproduitsptro1.iersIiquidesMesuragcduniveauetdeIatemperaturedans1.esreservoirsdestockageparmethodes
2、automatiques一Partie4:MesuragedeIatemperaturedansIeSreservoirsapressionatmospheriqueReferencenumberISO426642023(E)COPYRIGHTPROTECTEDDOCUMENTISO2023IUirhM*hedbdi1.iUedotherwiseupdhi.o啪InPSd1.Mc;GeatrOn1.Wsunmaytheinternetoranintranet,withoutpriorwrittenpermission.PermissioncanberequestedfromeitherISOa
3、ttheaddressbe1.oworISOsmemberbodyinthecountr)oftherequester.f),WVfifiU81.andonnet8CH-1214Vernier,GenevaPhone：M1.22749O1.11觥ftte:丽丽BQrgPub1.ishedinSwitzer1.andContentsForewordCa1.ibrationprior.45.3.5Variab1.e-IcngthATTsOvera1.1.accuracyAveraging8.3.5Variab1.e-IengthtemperaturetcmperatureCus1.odyca1.i
4、bra1.ionpurposesIransferCaIibrationiiiPageScope1Normativereferences1Termsanddefinitions1Precautions24.1 Safetyprecautions二4.2 Equipmentprecautions2Accuracy35.1 Genera1.352Int1.1.nS1.CerrorOfT,Ts.3.12343333Genera1.toinsta1.1.ationATTcaIibratedasasystem.4ATTca1.ibratedbycomponents4Mu1.tip1.e-point5.3.
5、6Uncertaintyofthereference45.4Errorcausedbyinsta1.1.ationandoperatingconditions45.5.1 Genera1.5.5.2 UseofATTforfisca1./custodytransferpurposes5Se1.ectionofATTsS61.一.56.2ATTsforfisca1./CUStOdytransferpurposes6DescriptionofATTequipment.67.1 Genera1.67.2 E1.ectrica1.temperaturee1.ements6I1一Insta1.Iatio
6、nofATTs78.1Genera1.8.2Sing1.e-point(spot)temperaturee1.ements.78.3.1 Genera1.temperaturee1.ements8.3.2 Upper,midd1.eand1.owertemperaturee1.ements78.3.3 Mu1.tip1.e-pointtemperaturee1.ements78.3.4 Mid-1.eve1.RTDdemente1.ements8.3.6 Moveab1.espottemperaturee1.ement88.4Thermowe1.1.sfore1.ectronictempera
7、turee1.ements9Ca1.ibrationandfie1.dverificationofATTs119.1 Genera1.119.2 Ca1.ibrationofsing1.e-point,ormid-1.eve1.temperaturee1.ementATTsforfisca1./9.2.1 transferpriortoinsta1.1.ation9.2.2Initia1.fie1.dverification119.3 Ca1.ibrationofupper,midd1.eand1.owerormu1.tip1.e-pointATTsforfisca1./custody9.3.
8、1 purposespriortoinsta1.1.ation9.3.2Initia1.he1.dVer1.fiCat1.on129.4 9(!ibrationCa1.(ifrationvpriabh1.engrtf11Ifiifafifi1.cus1.DdyIransferpurpDses.139.4.2Initia1.fie1.dverification139.5 SUbSeqUentVer1.fiCat1.onOfATIs.a.st.).*.13狷：2cyofsubsetIuentverificationi3109.5.3Recordkeeping14Datacommunicationa
9、ndreceiving.一.14B1.bI1.OgraPh)15Forewordthrough(1.SOmittees.workofPreparingbody1.ntemationa1.Standardsisnorma1.1.ytechnica1.e1.ectrotechnica1.standardization.Internationa1.E1.ectrotechnica1.Commission(IEC)ona1.1.mattersofdescribedtypesofISO/IECDirectivesrShouIdbePartiCU1.ar,documentwasapprova1.accor
10、dancewiththeISO（八）patent(三).attcntion1.akcs1.hcnopossibi1.ityconcerningimp1.ementationvahdityapp1.icabi1.ityinvo1.vec1.aimedcautioncdavai1.ab1.cWWW0iwg/PaUHKdatcstinformation,Whichresponsib1.eidentifyinganypatentconstitutenameendorsement,documentisinformationgivenfortheconvenienceofusersanddoesnotex
11、pressionsre1.ated。伸nization(WTO)assessment,asinwe1.1.asinfomationBaierstoTradeadherenceseeThisdocumentfromprcparcdorbyTechnica1.ComnnttecSubcornmit1.eePetroIeumMeasurementOfPetrOIeUmfiIekrevised.secondeditioncance1.sandrep1.acesthefirstedition(ISO4266-4:2002),whichhasbeentechnica1.1.ywiththeintemper
12、ature;p1.ete1.istingquestionsbodiesthiscandocumentWWWTtestandardsbody.AISO2023-A1.1.rightsreservedISO(theInternationa1.OrganizationforStandardization)isawor1.dwidefederationofnationa1.StandarcKbodiesmemberbodies).TheEachmemberinterestedinsubjectforwhichcarriedoutcommitteehasbeenestab1.ishedhastherig
13、httoberepresentedonthatcommittee.Internationa1.organizations,governmenta1.andnon-ove11menta1.1.in1.iaisonwithISO,a1.sotakepartinthework.ISOco1.1.aboratesc1.ose1.ywiththeTheproceduresusedtodeve1.opthisdocumentandthoseintendedforitsfurthermaintenancearedifferentinthedocumentPart1.Innoted.ThiSthediffer
14、eddraftedincriteriaforeditoria1.ru1.esoftheISO/IECDirectives,Part2(seewww.iso.org/direc1.ives).ofdrawsISOtopositionthatthetheevidence,ofthisordocumentmayofanytheusepatentrightsinrespectthereof.Asofthedateofpub1.icationofthisdocument,ISOhadnotreceivednoticeof（八）PatCnt(三)whichmayberequiredtoimp1.ementthisdocument.However,irnp1.cmcntersarcdatabasethatthisatmaythe.ISOsha1.1.behe1.dmayforobtainedfromtheora1.suchpatentrights.AnytradeusedinthisForanexp1.anationofthevo1.untarynatureOfstandards,themeaningofISOspecifictermsandthe
