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http://dx.doi.org/10.46670/JSST.2022.31.6.448

Intralaboratory Comparison of the Realization of the Triple-point Temperature of Mercury  

Inseok, Yang (Division of Physical Metrology, Korea Research Institute of Standards and Science)
Young Hee, Lee (Division of Physical Metrology, Korea Research Institute of Standards and Science)
Publication Information
Journal of Sensor Science and Technology / v.31, no.6, 2022 , pp. 448-454 More about this Journal
Abstract
An intralaboratory comparison of the realization of the triple-point temperature of mercury, which is defined as -38.8344℃ on the international temperature scale of 1990 (ITS-90), was conducted at the Korea Research Institute of Standards and Science (KRISS), the national metrology institute of Korea. To this end, four triple-point-of-mercury cells were compared using the resistance ratio measurement of a standard platinum resistance thermometer to validate the calibration results obtained using the triple-point-of-mercury cells at KRISS. The triple-point temperatures of all the four cells, one of which is designated as the national standard cell, were within 0.3 mK of the national standard. Based on 13 experiments on the four triple-point-of-mercury cells, the uncertainty in the comparison of the triple-point-of-mercury cells was 0.08 mK, and the uncertainty in the realization of the triple-point temperature of mercury was 0.19 mK. The results of the intralaboratory comparison validated that utilizing any of the four triple-point-of-mercury cells would result in the realization of a temperature within 0.3 mK of the average value determined by two key international comparisons for the realization of -38.3844℃ following the ITS-90.
Keywords
Triple point of mercury; Intralaboratory comparison; International Temperature Scale of 1990; Validity of results;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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