Designation:E2847−14StandardTestMethodforCalibrationandAccuracyVerificationofWidebandInfraredThermometers1ThisstandardisissuedunderthefixeddesignationE2847;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoverselectronicinstrumentsintendedformeasurementoftemperaturebydetectingtheintensityofthermalradiationexchangedbetweenthesubjectofmeasure-mentandthesensor.1.2Thedevicescoveredbythistestmethodarereferredtoasinfraredthermometersinthisdocument.1.3Theinfraredthermometerscoveredinthistestmethodareinstrumentsthatareintendedtomeasuretemperaturesbelow1000°C,measurethermalradiationoverawideband-widthintheinfraredregion,andaredirect-readingintempera-ture.1.4Thisguidecoversbestpracticeincalibratinginfraredthermometers.Itaddressesconcernsthatwillhelptheuserperformmoreaccuratecalibrations.Italsoprovidesastructureforcalculationofuncertaintiesandreportingofcalibrationresultstoincludeuncertainty.1.5Detailsonthedesignandconstructionofinfraredthermometersarenotcoveredinthistestmethod.1.6Thistestmethoddoesnotcoverinfraredthermometryabove1000°C.Itdoesnotaddresstheuseofnarrowbandinfraredthermometersorinfraredthermometersthatdonotindicatetemperaturedirectly.1.7ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.8Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.2.ReferencedDocuments2.1ASTMStandards:2E344TerminologyRelatingtoThermometryandHydrom-etryE1256TestMethodsforRadiationThermometers(SingleWavebandType)E2758GuideforSelectionandUseofWideband,LowTemperatureInfraredThermometers3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1cavitybottom,n—theportionoftheca...
