| 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 |
| Research Areas: |
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