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Investigation of Co-C cells for improved thermocouple calibration.

Edler, F*; Morice, R*; Ogura, H*; Pearce, J (2010) Investigation of Co-C cells for improved thermocouple calibration. Metrologia, 47 (1). pp. 90-95.

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An intercomparison of the melting temperatures of four Co-C eutectic fixed-point cells by using two Pt/Pd thermocouples was performed. The cells are usable for the calibration of thermocouples and were constructed in the participating laboratories of PTB, NPL, LNE and NMIJ/AIST. The measurements were performed in four different high-temperature furnaces but by applying the same measurement procedure. In spite of slightly different cell designs the melting temperatures of the investigated Co-C eutectic fixed-point cells agree very well within their expanded uncertainties of k = 2. The maximum differences of the realization of the melting temperatures of a particular cell in different laboratories by using different furnaces were found to be of the order of 85 mK (2 µV).

Item Type: Article
Keywords: Thermocouple, fixed point, eutectic, Co-C, Pt/Pd, Euramet, Euromet
Subjects: Engineering Measurements
Engineering Measurements > Thermal
Last Modified: 02 Feb 2018 13:15
URI: http://eprintspublications.npl.co.uk/id/eprint/4555

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