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Study of the interpolation characteristics of a sealed low temperature gas thermometer

โœ Scribed by K. Nara; R.L. Rusby; D.I. Head

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
709 KB
Volume
30
Category
Article
ISSN
0011-2275

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โœฆ Synopsis

A sealed gas thermometer with a pressure sensor attached has been developed and its interpolating characteristics have been studied. It was calibrated at three temperatures and a temperature scale was derived by quadratic interpolation, as is specified in ITS-90. This was compared with an established temperature scale, NPL75, between 5 and 24 K. The accuracy of the interpolation is found to be of the order of 1 mK between 5 and 14 K and 3 mK between 14 and 24 K. The systematic errors of the sealed gas thermometer are estimated and an assessment of the design is given.

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He-3 constant volume gas thermometer as interpolating instrument: calculations of the accuracy limit versus temperature range and design parameters
โœ P.P.M. Steur; F. Pavese ๐Ÿ“‚ Article ๐Ÿ“… 1989 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 397 KB

Calculations are presented for a constant-volume gas thermometer used as an interpolating instrument between fixed points in the range 3.2-25 K and using He-3 as a working gas. In addition to the accuracy of the fixed point realizations, it is shown to limit the additional interpolation uncertainty