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High temperature exposure of in-situ thermocouple fixed-point cells: stability with up to three months continuous use.

Elliott, C J; Greenen, A; Lowe, D; Pearce, J V; Machin, G (2015) High temperature exposure of in-situ thermocouple fixed-point cells: stability with up to three months continuous use. Metrologia, 52 (2). pp. 267-271.

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Abstract

Two miniature temperature fixed-point cells designed for in-situ thermocouple self-validation, the first containing a Pt-C eutectic alloy and the second containing a Ru-C eutectic alloy, have been exposed to high temperatures for 2200 h and 1570 h of use respectively (up to 3 months continuous use). Recalibration after long-term high-temperature exposure, where a tantalum sheathed thermocouple was in place continuously, is used to show that no significant drift of the melting temperature has occurred in either the Pt-C ingot nor the Ru-C ingot, over timescales many times longer than previously demonstrated.

Item Type: Article
Subjects: Engineering Measurements
Engineering Measurements > Thermal
Identification number/DOI: 10.1088/0026-1394/52/2/267
Last Modified: 02 Feb 2018 13:13
URI: http://eprintspublications.npl.co.uk/id/eprint/6549

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