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：

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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）。