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Fe-C eutectic fixed-point cells for contact thermometry: an investigation and comparison.

Elliott, C; Pearce, J V; Failleau, G*; Deuze, T*; Briaudean, S*; Sadli, M*; Machin, G (2012) Fe-C eutectic fixed-point cells for contact thermometry: an investigation and comparison. Metrologia, 49 (1). pp. 88-94.

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Abstract

Five iron-carbon (Fe-C) eutectic fixed-point cells have been constructed between NPL and LNE-Cnam to investigate the robustness and to measure the agreement of their melting temperatures. Each cell was constructed with a different selection of materials sourced by NPL and LNE-Cnam. The measured emfs at the Fe-C fixed-point temperature (1153 °C), compared between cells, agree within around 1.98 µV (90 mK), where the most important contribution to the uncertainty of each measurement is the inhomogeneity associated with the measuring Pt/Pd thermocouple. This demonstrates that these cells are suitable for use as secondary fixed-point cells in contact thermometry but the robustness of the presented cells is not found to be sufficient for maintaining their integrity during repeated cycling procedures.

Item Type: Article
Subjects: Engineering Measurements
Engineering Measurements > Thermal
Identification number/DOI: 10.1088/0026-1394/49/1/013
Last Modified: 02 Feb 2018 13:14
URI: http://eprintspublications.npl.co.uk/id/eprint/5301

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