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EnglishThis paper presents an apparatus for the calibration of long-stem platinum resistance thermometers at the argon triple point (T90 = 83.8058K), designed at the Institute of Low Temperature and Structural Research, Poland (INTiBS). A hermetically sealed cell filled at the Istituto Nazionale di Ricerca Metrologica, Italy with high purity gas (6N) is the main element of this apparatus. The cell is placed in a cryostat fully immersed in liquid nitrogen. A temperature-controlled shield ensures the quasi-adiabatic condition needed for proper realization of the phase transition. A system for correcting the temperature distribution along the thermometer well is also implemented. The cell cooling and argon solidification is carried out by filling the thermometer well with liquid nitrogen. A LabVIEW computer program written at INTiBS automatically controls the triple-point realization process. The duration of a melting plateau in the apparatus lasts for about 24 h. The melting width for F between 20% and 80% was <0.3mK. The reproducibility of the plateau temperature is better than ±20 μK.
Argon Triple-Point Device for Calibration of SPRTs / Kolodziej, B.; Manuszkiewicz, H.; Szmyrka Grzebyk, A.; Lipinski, L.; Steur, Petrus Paulus Mari; Pavese, F.. - In: INTERNATIONAL JOURNAL OF THERMOPHYSICS. - ISSN 0195-928X. - 36:2-3(2015), pp. 229-239. [DOI 10.1007/s10765-014-1768-0]
| Titolo: | Argon Triple-Point Device for Calibration of SPRTs | |
| Autori: | ||
| Data di pubblicazione: | 2015 | |
| Rivista: | INTERNATIONAL JOURNAL OF THERMOPHYSICS | |
| Digital Object Identifier (DOI): | http://dx.doi.org/DOI 10.1007/s10765-014-1768-0 | |
| Abstract: | This paper presents an apparatus for the calibration of long-stem platinum resistance thermometer...s at the argon triple point (T90 = 83.8058K), designed at the Institute of Low Temperature and Structural Research, Poland (INTiBS). A hermetically sealed cell filled at the Istituto Nazionale di Ricerca Metrologica, Italy with high purity gas (6N) is the main element of this apparatus. The cell is placed in a cryostat fully immersed in liquid nitrogen. A temperature-controlled shield ensures the quasi-adiabatic condition needed for proper realization of the phase transition. A system for correcting the temperature distribution along the thermometer well is also implemented. The cell cooling and argon solidification is carried out by filling the thermometer well with liquid nitrogen. A LabVIEW computer program written at INTiBS automatically controls the triple-point realization process. The duration of a melting plateau in the apparatus lasts for about 24 h. The melting width for F between 20% and 80% was <0.3mK. The reproducibility of the plateau temperature is better than ±20 μK. | |
| Full-text (pubblici): | none | |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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