Since Key Comparison CCT-K2, only few comparisons as regards realizations of cryogenic fixed points have been carried out, either bilateral (three, of which one still pending) or multilateral (two trilateral). Since a forthcoming follow-up is unlikely, any bilateral comparison, apart from key comparisons, is most welcome to provide evidence of the continuing thermometric capabilities of the laboratories involved in the realization of the ITS-90.Not too long after the establishment in 2018 of the Joint Research Laboratory for Fluid Metrology "Evangelista Torricelli" between LNE-CNAM and INRIM, the two laboratories agreed to perform a bilateral comparison, involving all the cryogenic fixed points of the scale between 13.8033 K and 273.16 K - including the two hydrogen vapour-pressure temperatures - required to cover the full platinum resistance-thermometer range, as dealt with in Section 3.3.1 of the text underlying the ITS-90. The results are reported here and show a substantial agreement within the combined uncertainties. (C) 2020 Elsevier Ltd. All rights reserved.

Comparison of ITS-90 realizations from 13 K to 273 K between LNE-CNAM and INRIM / Imbraguglio, D; Steur, Ppm; Sparasci, F. - In: MEASUREMENT. - ISSN 0263-2241. - 166:(2020), p. 108225. [10.1016/j.measurement.2020.108225]

Comparison of ITS-90 realizations from 13 K to 273 K between LNE-CNAM and INRIM

Imbraguglio, D;Steur, PPM;
2020

Abstract

Since Key Comparison CCT-K2, only few comparisons as regards realizations of cryogenic fixed points have been carried out, either bilateral (three, of which one still pending) or multilateral (two trilateral). Since a forthcoming follow-up is unlikely, any bilateral comparison, apart from key comparisons, is most welcome to provide evidence of the continuing thermometric capabilities of the laboratories involved in the realization of the ITS-90.Not too long after the establishment in 2018 of the Joint Research Laboratory for Fluid Metrology "Evangelista Torricelli" between LNE-CNAM and INRIM, the two laboratories agreed to perform a bilateral comparison, involving all the cryogenic fixed points of the scale between 13.8033 K and 273.16 K - including the two hydrogen vapour-pressure temperatures - required to cover the full platinum resistance-thermometer range, as dealt with in Section 3.3.1 of the text underlying the ITS-90. The results are reported here and show a substantial agreement within the combined uncertainties. (C) 2020 Elsevier Ltd. All rights reserved.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11696/64354
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