Journal
INTERNATIONAL JOURNAL OF THERMOPHYSICS
Volume 32, Issue 1-2, Pages 12-25Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10765-011-0922-1
Keywords
Differences T-T-90; International Temperature Scale ITS-90; Primary thermometry; Thermodynamic temperature
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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 - T (90)), 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 - T (90) for selected measurements from 0.65 K to 1358 K. We provide two analytic functions for T - T (90), one for use from 8 K to the triple point of water (T (TPW)) and one for use above T (TPW). The small discontinuity of the derivative dT (90)/d T at T (TPW) is discussed. We also identify temperature ranges where researchers are encouraged to undertake high-accuracy measurements of T - T (90).
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