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Publication Citation: CCT Key Comparison No 1 (CCT-K1): Realisations of the ITS-90, 0.65 K to 24.5561 K, Using Rhodium-Iron Resistance Thermometers

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Author(s): R L. Rusby; Christopher W. Meyer; Weston L. Tew; D I. Head; K D. Hill; O Tamura; P A. de Groot; B Fellmuth; A Storm; A Peruzzi; J Engert; D N. Astrov; Y Dedikov; G A. Kytin;
Title: CCT Key Comparison No 1 (CCT-K1): Realisations of the ITS-90, 0.65 K to 24.5561 K, Using Rhodium-Iron Resistance Thermometers
Published: June 01, 2004
Abstract: At its meeting in 1996 the CCT initiated five Key Comparisons to test the equivalence of realisations of the ITS-90 between National Measurement Institutes. CCT-K1 covers the temperature range from 0.65 K to 24.5561 K, in which the ITS-90 is defined by specified vapour-pressure equations for 3He (0.65 K to 3.2 K) and 4He (1.25 K to 5.0 K) and interpolation equations for a constant-volume gas thermometer (ICVGT) using 3He or 4He (3 K to 24.5561 K). The comparison was carried out using rhodium-iron resistance thermometers from the seven participating laboratories represented by the authors. The measurements were made in two experiments at NPL, which also coordinated the comparison.
Proceedings: TEMPMEKO 2004: 9th International Symposium on Temperature and Thermal Measurements in Industry and Science
Location: Cavtat - Dubrovnik , -1
Dates: June 22-25, 2004
Keywords: gas thermometry;helium vapor pressures;ITS-90;key comparison;resistance thermometry;temperature scales;thermometry
Research Areas: Thermometry, Calibrations (Thermodynamic)