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Investigations at INRIM on a Pd-C cell manufactured by NPL.

Battuello, M*; Florio, M*; Machin, G (2011) Investigations at INRIM on a Pd-C cell manufactured by NPL. Metrologia, 48 (5). pp. 241-245.

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One of a set of metal-carbon eutectic cells (a Pd-C cell) manufactured by NPL and used for a previous comparison of temperature scales with NIST has been investigated at INRIM. There it was implemented in two different furnaces, namely a single- and a three-zone, and measured with a standard radiation thermometer at 900 nm and 950 nm. Both ITS-90 and thermodynamic melting temperatures of the cell were determined through an extrapolation approach. The thermodynamic temperature agrees to within 0.31 K with the NIST determination, and the ITS-90 temperature is in agreement within 0.40 K with the NPL determination. The agreements, well within the combined uncertainties, are particularly significant, because of the different approach followed at INRIM, namely the extrapolation of multi fixed-points scales, as compared to a direct radiometric method at NIST and an ITS-90 realisation traceable to the gold point at NPL.

Item Type: Article
Keywords: High temperature fixed points, radiation thermometry, Pd-C
Subjects: Engineering Measurements
Engineering Measurements > Thermal
Identification number/DOI: 10.1088/0026-1394/48/5/002
Last Modified: 02 Feb 2018 13:14
URI: http://eprintspublications.npl.co.uk/id/eprint/5007

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