Netsu Bussei
Online ISSN : 1881-414X
Print ISSN : 0913-946X
ISSN-L : 0913-946X
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Volume 14, Issue 4
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  • Uncertainty Assessment on the Freezing Point of Silver in the ITS-90
    Masaru Arai, Katsuhiko Harada
    2000 Volume 14 Issue 4 Pages 278-283
    Published: October 31, 2000
    Released on J-STAGE: May 08, 2009
    DOIhttps://doi.org/10.2963/jjtp.14.278
    JOURNAL FREE ACCESS
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    The freezing point of silver, one of the temperature fixed points defined in the ITS-90, is realized using an open type cell. The uncertainty in realizing the freezing point was assessed. The sources of uncertainty estimated were repeatability, self-heating correction, surroundings pressure correction, hydrostatic pressure correction, surroundings temperature correction, temperature distribution in the cell and impurity effect of the metal. The combination of those sources of uncertainty gives a combined standard uncertainty of 1.39mK. The uncertainty coming from the impurity effect of the metal, 1.29mK, was found to be the largest source.
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