Comparisons of some NIST fixed-point cells with similar cells of other standards laboratories

In this paper we present results of international comparisons of fixed- point cells of some of the defining fixed-point materials of the International Temperature Scale of 1990. These comparisons involved cells from seven national laboratories, although in some cases only one type of fixed-point mat...

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Bibliographic Details
Published in:Metrologia 1996-06, Vol.33 (3), p.215-225, Article 215
Main Authors: Mangum, B W, Pfeiffer, E R, Strouse, G F, Valencia-Rodriguez, J, Lin, J H, Yeh, T I, Marcarino, P, Dematteis, R, Liu, Y, Zhao, Q, Ince, A T, Çakiroglu, F, Nubbemeyer, H G, Jung, H-J
Format: Article
Language:English
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Summary:In this paper we present results of international comparisons of fixed- point cells of some of the defining fixed-point materials of the International Temperature Scale of 1990. These comparisons involved cells from seven national laboratories, although in some cases only one type of fixed-point material was compared. Except for silver cells, the agreement among cells of the same defining fixed-point material from the various laboratories was to within 1 mK. The expanded uncertainties (k=2) of the comparison measurements were 12 muK for Ga, 18 muK for H2O, 27 muK for Sn, 35 muK for In, 37 muK for Zn, 42 muK for Al, and 55 muK for Ag.
ISSN:0026-1394
1681-7575
DOI:10.1088/0026-1394/33/3/4