The Non‐Uniqueness of the ITS‐90: 13.8033 K to 273.16 K
The Non‐Uniqueness of the ITS‐90: 13.8033 K to 273.16 K
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ITS-90 的非唯一性：13.8033 K 至 273.16 K
DOI：
10.1063/1.1627100
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
A. Steele
中科院分区：
文献类型：
--
作者：
K. Hill;A. Steele
ITS-90的非唯一性估计是基于在13.8033 K和273.16 K之间的80多个温度下对胶囊式标准铂电阻温度计的比较。使用这里报告的测量，以及Ward和Compton和Head的测量，我们得出结论，非唯一性在83.8058 K到234.3156 K的范围内呈现最大值（± 0.4 mK）。由于氩和汞固定点的温度相差超过150 K，没有中间校准点，因此可以预期该结果。关于最终将取代ITS-90的温标的细节的讨论必须考虑这一事实，如果非唯一性要最小化。然而，目前在这一温度范围内没有可实现所需准确度的候选定点，可列入订正国际温标。
Estimates of the non‐uniqueness of the ITS‐90 are reported based on comparisons of capsule‐style standard platinum resistance thermometers at more than eighty temperatures between 13.8033 K and 273.16 K. Using the measurements reported here, as well as those of Ward and Compton and Head, we conclude that the non‐uniqueness takes on its largest value (± 0.4 mK) in the range from 83.8058 K to 234.3156 K. This result may have been anticipated due to the fact that the argon and mercury fixed points are separated in temperature by more than 150 K, with no intermediate calibration points. Discussions concerning the details of the temperature scale that will eventually replace the ITS‐90 must consider this fact if the non‐uniqueness is to be minimized. At the present time, however, there are no candidate fixed points within this temperature range that are realizable to the required level of accuracy for inclusion into a revised International Temperature Scale.