A G Steele et al 2002 Metrologia 39 551 doi:10.1088/0026-1394/39/6/6
A G Steele1, B Fellmuth2, D I Head3, Y Hermier4, K H Kang5, P P M Steur6 and W L Tew7
Show affiliationsCalibrated capsule-type standard platinum resistance thermometers were used to compare national realizations of the International Temperature Scale of 1990 (ITS-90) from 13.8033 K, the triple point of equilibrium hydrogen, to 273.16 K, the triple point of water, for seven countries in CIPM Key Comparison CCT-K2. Measurements were made at temperatures close to the eight low-temperature defining fixed points of the ITS-90, using a copper comparison block capable of simultaneously holding nine thermometers. Two separate measurement runs were performed, allowing two different groups of capsules from each laboratory to be examined. The results are used to determine the degree of equivalence of the independent national realizations of the scale for use in the Mutual Recognition Arrangement Appendix B database. In addition, measurements were made with the first group of thermometers at approximately eighty temperatures throughout the cryogenic range, which provide information to evaluate some of the so-called scale non-uniqueness issues inherent in the ITS-90 interpolation scheme.
07.20.Mc Cryogenics; refrigerators, low-temperature equipment
Issue 6 (2002)
A G Steele et al 2002 Metrologia 39 551
Jonathan T. Barron et al. 2008 The Astronomical Journal 135 414
P W Martin 1999 Metrologia 36 247
S Bietti et al 2009 IOP Conf. Ser.: Mater. Sci. Eng. 6 012009
M. Honda et al 2009 ApJ 690 L110
T. Linden et al. 2009 ApJ 699 1573
Richard Kessler et al. 2009 ApJS 185 32
S Brian Edgar and José M M Senovilla 2004 Class. Quantum Grav. 21 L133
A H AlOmari et al 2009 Physiol. Meas. 30 371
D. M. Townsley et al. 2007 ApJ 668 1118