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

Published

August 21, 2003

Author(s)

Howard W. Yoon, David W. Allen, Charles E. Gibson, Robert D. Saunders, Bettye C. Johnson, Steven W. Brown, Keith R. Lykke

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.

Proceedings Title

NCSL International 2003 Workshop and Symposium Conference Proceedings | | |

Conference Dates

August 17-21, 2003

Conference Title

National Conference of Standards Laboratories International

Pub Type

Conferences

Keywords

blackbodies, cryogenic radiometer, detector-based radiometry, International Temperature Scale of 1990, radiation thermometer

Citation

Yoon, H. , Allen, D. , Gibson, C. , Saunders, R. , Johnson, B. , Brown, S. and Lykke, K. (2003), Temperature Scales Using Radiation Thermometers Calibratied From Absolute Irradiance and Radiance Responsivity, NCSL International 2003 Workshop and Symposium Conference Proceedings | | | (Accessed March 13, 2025)