Ricolfi, T*; Battuelle, M*; Girard, F*; Machin, G; McEvoy, H C; Ugur, S*; Diril, A* (2002) Radiation temperature scales between the indium and silver points realized at IMGC, NPL and UME using a fixed-point calibration technique. Meas. Sci. Technol., 13 (12). pp. 2090-3.

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Abstract

Radiation temperature scales were realized with a precision infrared thermometer at IMGC, NPL and UME using fixed-point blackbodies at the freezing points of indium, tin, zinc, aluminium and silver. From the fixed-point calibration in each laboratory, continuous scales were obtained with a four-coefficient interpolation equation. The differences between the three scales were well within 0.1°C at all temperatures between the indium and silver points. Calibrations of the same thermometer performed at NPL and UME using a more traditional calibration scheme based on the comparison with contact thermometers showed differences of up to more than 0.4°C. This suggested that the fixed-point scheme, that has been used for the first time in an international comparison, should be more reliable for accurate calibrations of precision infrared thermometers.

Item Type:	Article
Subjects:	Engineering Measurements Engineering Measurements > Thermal
Last Modified:	02 Feb 2018 13:17
URI:	https://eprintspublications.npl.co.uk/id/eprint/2735