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介绍了一等标准铂电阻温度计的在锌凝固点及锡凝固点检定的不确定度的评定方法，包括Ａ 类标准不确定度及Ｂ类标准不确定度的确定，标准不确定度的合成及有效自由度的计算，并按误差传播公式计算出了在各温度点的扩展不确定度及包含因子。
This paper introduces the evaluation method of the first-class standard platinum resistance thermometer for the determination of uncertainty of zinc freezing point and tin freezing point verification, including the determination of type A standard uncertainty and type B standard uncertainty, the synthesis of standard uncertainty and effective freedom Degree of calculation, and according to the error propagation formula calculated at each temperature point of expansion uncertainty and inclusion factor.