TEMPERATURE COEFFICIENTS OF TOPCON RADIATION THERMOMETERS

Fumihiro Sakuma

Abstract

The ambient or instrument temperature affects the outputs of a standard radiation thermometer through various parts such as a detector, a feedback resistance and an interference filter. Usually the output was corrected by one coefficient assuming the linear dependence. If the filter wavelength changes, the dependence is different at each target temperature. We measured the temperature coefficients of Topcon radiation thermometers at different target temperatures and found the target temperature dependence as well as the feed back resistance dependence. Therefore a high stability radiation thermometer requires controlling the detector, filter and amplifier temperatures.

Keywords

ambient temperature effect, radiation thermometer, wavelength shift

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IMEKO-WC-2009-TC12-231.pdf

DOI

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IMEKO TC

TC12 - Temperature and Thermal Measurements

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