NDLI: Temperature Characteristics of Platinum–Cobalt Resistance Thermometers Based on the ITS-90 Above 14 K

Content Provider	Springer Nature Link
Author	Naka, T. Takasu, S. Tamura, O. Kobayashi, T. Tanaka, Y.
Copyright Year	2014
Abstract	Three platinum–cobalt resistance thermometers (PtCoRTs), which are manufactured in a structure similar to a capsule-type standard platinum resistance thermometer (SPRT), were calibrated against the capsule-type SPRTs, which was calibrated based on the International Temperature Scale of 1990 (ITS-90) at NMIJ. The thermometers were calibrated in the temperature range from the triple point of equilibrium hydrogen to the triple point of water by using the dissemination system of the ITS-90 at NMIJ. In this study, the temperature dependence of the resistance ratio, $$W$$ , which is the ratio of the resistance obtained at each temperature by the calibration to the resistance at the triple point of water, is obtained for each PtCoRT. In the temperature region below the triple point of Ne, the temperature dependence of $$W$$ of each PtCoRT is fitted by a 4th-order polynomial. In the temperature region above the triple point of Ne, a 13th-order polynomial is fitted to the temperature dependence of $$W$$ . It was found that residuals for the polynomial fits of each PtCoRT were less than 0.3 mK in both temperature regions.
Starting Page	1044
Ending Page	1054
Page Count	11
File Format	PDF
ISSN	0195928X
Journal	International Journal of Thermophysics
Volume Number	35
Issue Number	6-7
e-ISSN	15729567
Language	English
Publisher	Springer US
Publisher Date	2014-06-22
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Dissemination of the ITS-90 Low temperature Platinum–cobalt resistance thermometer Condensed Matter Physics Mechanics Industrial Chemistry/Chemical Engineering Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics

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Temperature Characteristics of Platinum–Cobalt Resistance Thermometers Based on the ITS-90 Above 14 K

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