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Present estimates of the differences between thermodynamic temperatures and the ITS-90.

Fischer, J*; de Podesta, M; Hill, K; Moldover, M*; Pitre, L*; Rusby, R; Steur, P*; Tamura, O*; White, R*; Wolber, L* (2011) Present estimates of the differences between thermodynamic temperatures and the ITS-90. Int. J. Thermophysics, 32 (1-2). pp. 12-25.

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Abstract

At the request of the Consultative Committee for Thermometry (CCT), Working Group 4 (WG4) has critically reviewed all available measurements of the differences between thermodynamic and ITS-90 temperatures, (T - T90), and documented the conversion of older data to the ITS-90. Particular attention has been given to the uncertainties. Based on this review, we provide consensus estimates of T - T90 for selected measurements from 0.65 K to 1358 K. We provide two analytic functions for T - T90, one for use from 8 K to the triple point of water (TTPW) and one for use above TTPW. The small discontinuity of the derivative dT90/dT at TTPW is discussed. We also identify temperature ranges where researchers are encouraged to undertake high-accuracy measurements of T - T90.

Item Type: Article
Keywords: differences T - T90, International Temperature Scale ITS-90, primary thermometry, thermodynamic temperature
Subjects: Engineering Measurements
Engineering Measurements > Thermal
Identification number/DOI: 10.1007/s10765-011-0922-1
Last Modified: 02 Feb 2018 13:14
URI: http://eprintspublications.npl.co.uk/id/eprint/4948

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