Evaluation and selection of high-temperature fixed-point cells for thermodynamic temperature assignment

From National Research Council Canada

DOIResolve DOI: http://doi.org/10.1007/s10765-015-1860-0
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Name affiliation
  1. National Research Council Canada. Measurement Science and Standards
TypeArticle
Journal titleInternational Journal of Thermophysics
ISSN0195-928X
1572-9567
Volume36
Issue8
Pages1834–1847
SubjectHigh-temperature fixed points; Metal-carbon eutectics; Radiation thermometry; Temperature standards; Thermodynamic temperature
Abstract
A multi-partner project to determine the thermodynamic temperatures of a selected set of high-temperature fixed points based on metal-carbon eutectics is underway as a working group activity within the Comité International des Poids et Mesures. The investigation focuses on four fixed-point types, namely, the three metal-carbon eutectic points of Re-C (2474∘C)(2474∘C) , Pt-C (1738∘C)(1738∘C) , and Co-C (1324∘C)(1324∘C) , and the Cu point (1084.62∘C)(1084.62∘C) . This paper describes the construction, pre-evaluation, and screening stage of the cells prior to their thermodynamic temperature determinations. The construction of the HTFP cells was undertaken by nine national metrology institutes (NMIs) according to instructions laid out in a pre-agreed protocol that ensures production of best quality cells. Four NMIs conducted the evaluation, each for a certain fixed-point type, and screened out cells that did not meet pre-determined selection criteria while assuring sufficient variety in the sources of the cells in the final selected sets. In autumn 2012, the selected cells were successfully passed on to the final stage of the project, the thermodynamic temperature measurement, and assignment.
Publication date
PublisherSpringer
LanguageEnglish
Peer reviewedYes
NPARC number23001003
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Record identifier2978e05f-a32e-4928-a8f0-c016feb07ca3
Record created2016-11-25
Record modified2016-11-25
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