Abstract The paper presents a matrix approach to the propagation of uncertainties in the realization of the ITS-90 using Standard Platinum Resistance Thermometers (SPRT) calibrated at Defining Fixed Points (DFPs). The procedure allows correlations to be included between SPRT resistances measured during the calibration at the DFPs (i.e., the realization of the ITS-90) and the resistances measured during the subsequent use of the SPRT to measure temperature T90. The example also shows the possible contribution of these correlations to the overall temperature uncertainty measured by a calibrated SPRT.

中文翻译：

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使用标准铂电阻温度计实现 ITS-90 温标时不确定度传播的矩阵表示

摘要 本文介绍了使用在定义固定点 (DFP) 处校准的标准铂电阻温度计 (SPRT) 实现 ITS-90 时不确定性传播的矩阵方法。该程序允许在 DFP 校准期间测量的 SPRT 电阻（即 ITS-90 的实现）与随后使用 SPRT 测量温度 T90 期间测量的电阻之间包含相关性。该示例还显示了这些相关性对校准 SPRT 测量的整体温度不确定性的可能贡献。