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Three laboratories were involved in an interlaboratory comparison to measure six Pt/Au thermocouples at the silver solidification point. The aim was to compare the repeatability at each laboratory with the reproducibilities between the laboratories. Immersion characteristics were also checked and it was found that the effect of withdrawing a thermocouple from the freezing point cell generally caused a change in the EMF output. Some measurements made at the freezing points of aluminium and tin showed short-term repeatabilities similar to the measurements with silver. Subsequent measurements with tin allowed evaluation of the repeatability at those points and the study of annealing effects.

Additional information

Authors: DE GROOT M J, Nederlands Meetinstituut - Van Swinden Laboratory, Delft (NL);CHATTLE M V, National Physical Laboratory, Teddington (GB);CARTER D F, National Physical Laboratory, Teddington (GB);LE POMMELLEC J Y, Institut National de Métrologie, Paris (FR)
Bibliographic Reference: EUR 15087 EN (1994) 31 pp., MF, ECU 4
Availability: (2)
Record Number: 199410354 / Last updated on: 1994-11-28
Original language: en
Available languages: en
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