RADIATION THERMOMETRY BASED ON RADIOMETRIC STANDARD

Stéphan Briaudeau, Bernard Rougié, Jeanne Marie Coutin, Georges Bonnier, Jean Bastie

Abstract

A new temperature measurement process based on radiometric standard has been realised at BNM INM. A radiance-meter is used to calibrate a tunable monochrom atic source which is compared to a black body with a spectral spectroradiometer. The radiance m eter is calibrated against a cryogeni c radiometer. The spectral radiance measurement wavelength is selected by the spectroradiometer. The temperature is then deduced from the spectral radiance with the Planck's law. The monochrom atic source can be scanned over 10 nm around 830 nm in order to measure the slit function of the spectroradiometer. The stability of the m onochrom atic source, is about 10^-4 over one hour. This set up can be used to measure high temperatures above 2000°C without comparison to ITS90 fixed point.

Keywords

high temperature, radiance meter, Planck radiation, radiometry

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PWC-2003-TC12-014.pdf

DOI

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IMEKO TC

TC12 - Temperature and Thermal Measurements

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