The subrange inconsistency (SRI) of a large ensemble of long-stem standard platinum resistance thermometers (SPRTs), representative of worldwide production, has been investigated for all pairs of ITS-90 overlapping subranges between 83.8058K and 933.473K. The results are reported in terms of various statistical parameters to facilitate their comparison with the results of different authors, although a statistical test, applied to one specific pair of subranges, supported a Gaussian distribution of the results and justified the subsequent use of the mean and standard deviation as statistical parameters. Depending on the pair of overlapping subranges, the mean SRI as calculated varied from −1.23 mK to +0.21 mK and the SRI standard deviation varied from 0.04 mK to 0.62 mK. These numbers generally increased with the upper temperature limit of the pair of subranges, especially where the lower subrange requires a point which is not included in the upper subrange. The contribution to SRI from the fixed-point uncertainty propagation (PoU) was evaluated. The results showed that, although the effect of PoU on SRI largely cancels out for points common to both subranges, PoU still amounts to 59% to 130% of the differences between overlapping pairs of subranges. This means that the differences as calculated are probably a substantial overestimate of the true SRI. It is suggested that this effect is taken into account in making recommendations for typical uncertainties due to non-uniqueness.

已针对 83.8058K 和 933.473K 之间的所有 ITS-90 重叠子范围对研究了代表全球生产的大型长杆标准铂电阻温度计 (SPRT) 的子范围不一致 (SRI)。结果以各种统计参数报告，以方便与不同作者的结果进行比较，尽管统计检验应用于一对特定的子范围，支持结果的高斯分布并证明随后使用平均值和标准偏差作为统计参数。根据重叠子范围对，计算的平均 SRI 从 -1.23 mK 到 +0.21 mK，SRI 标准偏差从 0.04 mK 到 0.62 mK。这些数字通常随着这对子范围的温度上限而增加，特别是在下子范围需要不包括在上子范围中的点的情况下。评估了定点不确定性传播 (PoU) 对 SRI 的贡献。结果表明，虽然 PoU 对 SRI 的影响在很大程度上抵消了两个子范围共有的点，但 PoU 仍然占重叠子范围对之间差异的 59% 到 130%。这意味着计算出的差异可能大大高估了真实的 SRI。建议在针对非唯一性导致的典型不确定性提出建议时考虑这种影响。评估了定点不确定性传播 (PoU) 对 SRI 的贡献。结果表明，虽然 PoU 对 SRI 的影响在很大程度上抵消了两个子范围共有的点，但 PoU 仍然占重叠子范围对之间差异的 59% 到 130%。这意味着计算出的差异可能大大高估了真实的 SRI。建议在针对非唯一性导致的典型不确定性提出建议时考虑这种影响。评估了定点不确定性传播 (PoU) 对 SRI 的贡献。结果表明，虽然 PoU 对 SRI 的影响在很大程度上抵消了两个子范围共有的点，但 PoU 仍然占重叠子范围对之间差异的 59% 到 130%。这意味着计算出的差异可能大大高估了真实的 SRI。建议在针对非唯一性导致的典型不确定性提出建议时考虑这种影响。这意味着计算出的差异可能大大高估了真实的 SRI。建议在针对非唯一性导致的典型不确定性提出建议时考虑这种影响。这意味着计算出的差异可能大大高估了真实的 SRI。建议在针对非唯一性导致的典型不确定性提出建议时考虑这种影响。