Non-uniqueness and propagating uncertainties of the temperature scale realized using the triple point of sulfur hexafluoride

Non-uniqueness and propagating uncertainties of the temperature scale realized using the triple point of sulfur hexafluoride
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利用六氟化硫三相点实现的温标的非唯一性和传播不确定性

DOI:
10.1016/j.measen.2022.100464
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发表时间:
2022
期刊:
Measurement: Sensors
影响因子:
--
通讯作者:
Nakano Tohru
Nakano Tohru
中科院分区:
--
文献类型:
--
作者:
Kawamura Yasuki;Nakano Tohru

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在六氟化硫(TPSF6)三相点标定的标准铂电阻温度计(SPRT)上实现的温标的非唯一性进行了评估,考虑到sf6是替代ITS-90必不可少的汞三相点(TPHg)的潜在候选点。在tpsf6上校准的三个sprt与参考温度计进行了比较,从14 K到250 K,使用精密测量系统用于胶囊式温度计。对sprt标定不确定度传播引起的温标不确定度进行了评价。结果表明,在tpsf6上校准的sprt的温标非唯一性几乎等同于当前ITS-90的温标。这表明tpsf6具有实现一种改进型ITS-90的能力,相当于目前的ITS-90。
The non-uniqueness of the temperature scale realized on the standard platinum resistance thermometer (SPRT) calibrated at the triple point of sulfur hexafluoride (TPSF6) has been evaluated, given that SF6is a potential candidate for substitution of the triple point of mercury (TPHg) which is indispensable point for the ITS-90. Three SPRTs calibrated at the TPSF6were compared with a reference thermometer from 14 K to 250 K using a precise measurement system for capsule type thermometers. The uncertainty of the temperature scale due to propagation of the uncertainties for calibrating the SPRTs was also evaluated. The results showed that the non-uniqueness of the temperature scale of the SPRTs calibrated at the TPSF6was almost equivalent to that of the current ITS-90. This indicates that the TPSF6possesses the capability for realization of a modified ITS-90 which is equivalent to the current ITS-90.
ITS-90 的非唯一性:13.8033 K 至 273.16 K
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