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2022 update for the differences between thermodynamic temperature and ITS-90 below 335 K

From National Research Council Canada

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DOIResolve DOI: https://doi.org/10.1063/5.0131026
AuthorSearch for: ORCID identifier: https://orcid.org/0000-0003-1745-7368; Search for: ORCID identifier: https://orcid.org/0000-0003-2724-4358; Search for: ORCID identifier: https://orcid.org/0000-0002-1631-5133; Search for: ORCID identifier: https://orcid.org/0000-0001-6253-6108; Search for: ORCID identifier: https://orcid.org/0000-0003-4049-823X; Search for: ORCID identifier: https://orcid.org/0000-0002-0966-2823; Search for: ORCID identifier: https://orcid.org/0000-0002-2296-0884; Search for: 1ORCID identifier: https://orcid.org/0000-0001-7875-9592; Search for: ORCID identifier: https://orcid.org/0000-0002-3865-3133; Search for: ORCID identifier: https://orcid.org/0000-0002-9130-4338; Search for: ORCID identifier: https://orcid.org/0000-0001-5161-8554; Search for: ORCID identifier: https://orcid.org/0000-0002-9979-9136; Search for: ORCID identifier: https://orcid.org/0000-0002-7771-1703; Search for: ORCID identifier: https://orcid.org/0000-0002-8156-7943; Search for: ORCID identifier: https://orcid.org/0000-0001-7945-9671; Search for: ORCID identifier: https://orcid.org/0000-0002-5204-3403
Affiliation
  1. National Research Council of Canada. Metrology Research Centre
FormatText, Article
Subjectthermodynamic temperature; primary thermometry; international temperature scale; ITS-90; gas thermometry
Abstract
In 2011, a working group of the Consultative Committee for Thermometry published their best estimates of the differences between the thermodynamic temperature T and its approximation (T₉₀), the temperature according to the International Temperature Scale of 1990, ITS-90. These consensus estimates, in combination with measurements made in accordance with ITS-90, are an important alternative to primary thermometry for those requiring accurate measurements of thermodynamic temperature. Since 2011, there has been a change in the definition of the kelvin and significant improvements in primary thermometry. This paper updates the (T − T₉₀) estimates by combining and analyzing the data used for the 2011 estimates and data from more recent primary thermometry. The results of the analysis are presented as a 12th-order polynomial representing the updated consensus values for the differences and a sixth-order polynomial for their uncertainty estimates.
Publication date
PublisherAmerican Institute of Physics
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  • Journal of Physical and Chemical Reference Data 51, no. 4, 043105 (27 December 2022).
LanguageEnglish
Peer reviewedYes
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Record identifierbc2aaeed-7890-46b3-9e2c-d2fdddf3e844
Record created2023-09-19
Record modified2023-09-19
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