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 0.65K to 1358 K. We provide two analytic functions for T − T90, one for use from 8K 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.
Present estimates of the differences between thermodynamic temperatures and the ITS-90 / Fischer, J.; Depodesta, M.; Hill, K. D.; Moldover, M.; Pitre, L.; Rusby, R.; Steur, PETRUS PAULUS MARI; Tamura, O.; White, R.; Wolber, L.. - In: INTERNATIONAL JOURNAL OF THERMOPHYSICS. - ISSN 0195-928X. - 32:(2011), pp. 12-25. [10.1007/s10765-011-0922-1]
Present estimates of the differences between thermodynamic temperatures and the ITS-90
STEUR, PETRUS PAULUS MARI;
2011
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 0.65K to 1358 K. We provide two analytic functions for T − T90, one for use from 8K 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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
