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New interpolating equations of ITS-90 for SPRTs and HTSPRTs for the temperature range 419.527 ° C–961.78 ° C
Metrologia ( IF 2.1 ) Pub Date : 2020-06-25 , DOI: 10.1088/1681-7575/ab8828
J P Sun 1 , T Li 1 , X P Hao 1 , J Pan 2 , J X Zeng 2
Affiliation  

The subrange inconsistency (SRI) of the International Temperature Scale of 1990 (ITS-90) arises from the use of different interpolating equations for the same standard platinum resistance thermometers (SPRTs), called Type 1 non-uniqueness, and is a significant component of the uncertainty in the realization of the scale. In order to eliminate the SRI, new interpolating equations were proposed for the subranges 0.01 ° C to 660.323 ° C and 0.01 ° C to 961.78 ° C, in which the subrange to the zinc point (419.527 ° C) was extended using two additional terms without any overlap. This study investigated 30 SPRTs calibrated over the temperature range of 0.01 ° C–660.323 ° C and 19 high-temperature SPRTs (HTSPRTs) calibrated over 0.01 ° C–961.78 ° C at the National Institute of Metrology (NIM). The feasibility of the proposed equations were evaluated by comparing them with the equations defined in ...

中文翻译:

温度范围为419.527°C–961.78°C的SPRT和HTSPRT的ITS-90的新插值方程

1990年国际温度标度(ITS-90)的子范围不一致(SRI)是由于对相同的标准铂电阻温度计(SPRT)使用不同的插值方程式造成的,称为类型1非唯一性,并且是实现规模的不确定性。为了消除SRI,针对0.01°C至660.323°C和0.01°C至961.78°C的子范围提出了新的插值方程,其中使用两个附加项扩展了锌点的子范围(419.527°C)没有任何重叠。这项研究调查了美国国家计量学院(NIM)在0.01°C–660.323°C的温度范围内校准的30个SPRT和在0.01°C–961.78°C的温度范围内校准的19个高温SPRT(HTSPRT)。
更新日期:2020-06-26
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