Study of the reference standard facility of rhodium-iron resistance thermometer

• Veröffentlicht in: Физика низких температур
• Datum: 2014
• Hauptverfasser: Yin, L., Lin, P., Qi, X.
• Format: Artikel
• Sprache: English
• Veröffentlicht: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2014
• Schlagworte: Техника и методы низкотемпературного эксперимента
• Online Zugang: https://nasplib.isofts.kiev.ua/handle/123456789/119491
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Zitieren: Study of the reference standard facility of rhodium-iron resistance thermometer / L. Yin, P. Lin, X. Qi // Физика низких температур. — 2014. — Т. 40, № 3. — С. 340-344. — Бібліогр.: 11 назв. — англ.

A 704 type ⁴He cryostat is designed and the “National (China) Temperature Working Standard Group of the ITS-90 at 1.2–24 K” have been composed. A 703 type ³He cryostat have been established and the working temperature of the “National Temperature Working Standard Group of the ITS-90 at 1.2–24 K” is extended to 0.65 K, which is the lowest limit temperature of ITS-90. The 5 rhodium-iron resistance thermometers (RIRTs) which compose the Working Standard Group have been transformed to the International Temperature Scale of 1990 (ITS-90). A set of indexing data is fitted and calculated as the indexing table of the standard facility of RIRT. 42 basis temperature points have been measured at 0.67–26.37 K. The results show that the temperature control level could reach 0.5 mK/30 min. The difference between the temperature value of the 5 RIRTs and the average is less than 1.1 mK, and the comparison measurements uncertainty is 0.95 mK.