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Publication Citation: Temperature Scales Using Radiation Thermometers Calibratied From Absolute Irradiance and Radiance Responsivity

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Author(s): Howard W. Yoon; David W. Allen; Charles E. Gibson; Robert D. Saunders; Bettye C. Johnson; Steven W. Brown; Keith R. Lykke;
Title: Temperature Scales Using Radiation Thermometers Calibratied From Absolute Irradiance and Radiance Responsivity
Published: Date Unknown
Abstract: In the International Temperature Scale of 1990 (ITS-90), temperatures above the freezing temperature of silver are defined with radiation thermometers calibrated using spectral radiance ratios to one of the silver-, gold- or copper-freezing temperature blackbodies and Planck's radiance law. However, due to the use of spectral radiance ratios, the temperature uncertainties of the ITS-90 defined using these thermometers increase as the square of the temperature ratios. Using absolute radiometry, thermodynamic temperatures can be determined with radiation thermometers traceable to a cryogenic radiometer, and the resulting temperature uncertainties can be lower than those measured using the ITS-90 techniques. We describe the development of a new international temperature scale based upon absolute radiometry.
Conference: National Conference of Standards Laboratories International
Proceedings: NCSL International 2003 Workshop and Symposium Conference Proceedings | | |
Dates: August 17-21, 2003
Keywords: blackbodies;cryogenic radiometer;detector-based radiometry;International Temperature Scale of 1990;radiation thermometer
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