REG_2012.PRE.394.1655

Title of presentation

Standards for Radiation ThermometryFrank LiebmannNCSLi 20121OverviewLearning ObjectivesIntroductionOverview of StandardsBIPMIECASTMVDI/VDEMSLEMAConcluding Remarks

7/31/12Liebmann - NCSL2OverviewLearning ObjectivesIntroductionOverview of StandardsBIPMIECASTMVDI/VDEMSLEMAConcluding Remarks

7/31/12Liebmann - NCSL3Learning ObjectivesGain knowledge of the published standards available pertaining to radiation thermometry and infrared thermometry.Apply published standards to measurement, calibration, and testing involving radiation thermometry and infrared thermometry.

7/31/12Liebmann - NCSL4IntroductionHistorically a lack of standardsPast 5 years, an increase of standards

7/31/12Liebmann - NCSL5SourcesTopicsAccuracy LevelsBIPMIECASTMVDI/VDEUsageCalibrationTestingUncertainty calculationIndustrialStandards LaboratoryNMIOverview of StandardsBodyStandardUsageCalibrationUncertaintiesTest MethodsNMIHigh-endIndustrialBIPMCCT-WG508-03IECIEC 62492-1ASTME1256ASTME2758ASTME2847VDI3511 Part 4VDI3511 Part 4.2VDI3511 Part 4.3VDI3511 Part 4.4MSLTG22EMATechnical Guide Radiation Thermometer Calibration Full applicability Partial applicability7/31/12Liebmann - NCSL6OverviewLearning ObjectivesIntroductionOverview of StandardsBIPMIECASTMVDI/VDEMSLEMAConcluding Remarks

7/31/12Liebmann - NCSL7BIPMCCT-WG508-03, Uncertainty budgets for calibration of radiation thermometers below the silver pointScope is limited to radiation thermometers with readout in radiance and not temperatureUseful for other types of work7/31/12Liebmann - NCSL8BlackbodyRadiation ThermometerCalibration Equation and UseCalibration temperature **Impurities *Plateau identification *Blackbody emissivity, isothermalBlackbody emissivity, non-isothermal **Reflected ambient radiationCavity bottom heat exchangeConvection **Cavity bottom uniformity **Ambient conditions **Size-of-source effectNon-linearityReference temperatureAmbient temperatureAtmospheric absorptionGain ratiosNoiseInterpolation errorDriftUnknown temperature* Fixed point blackbody only** Variable temperature blackbody onlyBIPM Sakuma-Hattori

7/31/12Liebmann - NCSL9BIPM Other StandardsCCT/03-03, Uncertainty budgets for realization of scales by radiation thermometryCovers work done above the silver-point (961.78 C) Fixed-points as blackbody sources


7/31/12Liebmann - NCSL11IEC 62492-1Industrial process control devices - Radiation thermometers - Part 1: Technical data for radiation thermometersTerms, definitions and abbreviations for radiation thermometryHow to state technical data based on these terms all related to radiation thermometry7/31/12Liebmann - NCSL12 Measuring temperature range Measurement uncertainty (accuracy) Noise equivalent temperature difference Measuring distance Field-of-view Distance ratio Size-of-source effect Emissivity setting Spectral range Influence of the internal instrument or ambient temperature (temperature parameter) Influence of air humidity (humidity parameter) Long-term stability Short-term stability Repeatability Interchangeability Response time Exposure time Warm-up time Operating temperature range and air humidity range Storage and transport temperature range and air humidity rangeIEC Work ItemsPart 2 SpecificationsBeing draftedPart 3 Test MethodsNot yet started7/31/12Liebmann - NCSL13OverviewLearning ObjectivesIntroductionOverview of StandardsBIPMIECASTMVDI/VDEMSLEMAConcluding Remarks

7/31/12Liebmann - NCSL14ASTM Committee E20Committee E20 on Temperature MeasurementSubcommitteesDesignationTitleE20.02Radiation ThermometryE20.03Resistance ThermometersE20.04ThermocouplesE20.05Liquid-in-Glass Thermometers and HydrometersE20.06New Thermometers and TechniquesE20.07Fundamentals in ThermometryE20.09Digital Contact ThermometersE20.90ExecutiveE20.91Editorial and TerminologyE20.94Publication7/31/12Liebmann - NCSL15E20.02 Roadmap2008Get handheld IR thermometer users to make more accurate measurementsUsage (E2758)Calibration (E2847)CurrentlyRT ClassificationEmissivity StandardRT Manual7/31/12Liebmann - NCSL16ASTM E20.02 StandardsE1256-11a: Standard Test Methods for Radiation Thermometers (Single Waveband Type)E2758-10: Standard Guide for Selection and Use of Wideband, Low Temperature Infrared ThermometersE2847-11: Standard Practice for Calibration and Accuracy Verification of Wideband Infrared Thermometers7/31/12Liebmann - NCSL17ASTM E1256Standard Test Methods for Radiation Thermometers (Single Waveband Type)Calibration Accuracy Test MethodRepeatability Test MethodField-of-View Test Method (Target Size Test Method)Response Time Test MethodWarm-Up Time Test MethodLong-Term Stability Test Method (Long-Term Drift Test Method)

7/31/12Liebmann - NCSL18ASTM E2758Standard Guide for Selection and Use of Wideband, Low Temperature Infrared ThermometersBasic usage of infrared thermometersInformation on issues that may arise when using infrared thermometryTest methods to determineEmissivityTransmissivityReflected temperatureGraphical summary of equations for infrared thermometryMathematical methods to determine the error caused by emissivity miscalculation, reflected temperature miscalculation, and atmospheric effectsThe mathematical methods use the Sakuma-Hattori EquationContain worked examples7/31/12Liebmann - NCSL19ASTM E2847Standard Practice for Calibration and Accuracy Verification of Wideband Infrared ThermometersComparison of an infrared thermometer to the radiance temperature of a radiation sourceCavity blackbody sourcesFlat-plate sourcesEquipmentThermal Radiation SourceAperture *Transfer StandardAmbient Temperature ThermometerDistance Measuring DevicePurge *Two traceability schemesPreparation of EquipmentCalibration ProcedureUncertainties7/31/12Liebmann - NCSL20E2847


7/31/12Liebmann - NCSL22VDI/VDEVerein Deutscher Ingenieure (VDI) and Verband der Elektrotechnik, Elektronik und Informationstechnik (VDE)

VDI/VDE 3511 Blatt 4 Technische Temperaturmessung Strahlungsthermometrie (VDI/VDE 3511 Part 4 Temperature measurement in industry Radiation thermometry)4 Documents covering radiation thermometryPart 4, discusses basic theoretical and practical considerations concerning radiation thermometryPart 4.2 contains the Maintenance of the specification for radiation thermometersPart 4.3 is entitled Standard test methods for radiation thermometers with one wavelength rangePart 4.4 is entitled, Calibration of radiation thermometers

7/31/12Liebmann - NCSL23VDI/VDEVDI/VDE 3511 Part 4.3ASTM E1256Measuring Temperature RangeMeasurement uncertainty (accuracy)Calibration AccuracyInfluence of the internal instrument temperatureLong-term stabilityLong-Term StabilityRepeatabilityRepeatabilityNoise equivalent temperature differenceSpectral rangeTarget/target sizeField-of-viewResponse timeResponse TimeExposure timeOperating ambient temperatureStorage temperature rangeWarm-Up Time7/31/12Liebmann - NCSL24OverviewLearning ObjectivesIntroductionOverview of StandardsBIPMIECASTMVDI/VDEMSLEMAConcluding Remarks

7/31/12Liebmann - NCSL25MSL TG22MSL Technical Guide 22, Calibration of Low-Temperature Infrared Thermometers. Geared towards handheld infrared thermometersHow infrared thermometers measure temperatureDiscusses influences on infrared thermometer measurement including introduction of a measurement equationHow the signal is processed and about measurement errorsCalibration and calibration sources including the concepts of calibrating the source by contact thermometry or by radiation thermometryMethod to determine detector temperature for an infrared thermometer. 7/31/12Liebmann - NCSL26OverviewLearning ObjectivesIntroductionOverview of StandardsBIPMIECASTMVDI/VDEMSLEMAConcluding Remarks

7/31/12Liebmann - NCSL27Entidad Mexicana de AcreditacinGua Tcnica Sobre Trazabilidad e Incertidumbre en la Calibracin de Termmetros de RadiacinTechnical Guide on Traceability and Uncertainty for Radiation Thermometer CalibrationPurely in SpanishTraceabilityUncertaintyCalibration schemes for calibration equipmentGood practice for radiation thermometry metrology


7/31/12Liebmann - NCSL29Concluding Remarks7/31/12Liebmann - NCSL30BodyStandardUsageCalibrationUncertaintiesTest MethodsNMIHigh-endIndustrialBIPMCCT-WG508-03IECIEC 62492-1ASTME1256ASTME2758ASTME2847VDI3511 Part 4VDI3511 Part 4.2VDI3511 Part 4.3VDI3511 Part 4.4MSLTG22EMATechnical Guide Radiation Thermometer Calibration Full applicability Partial applicabilityQuestions7/31/12Liebmann - NCSL31