The uncertainty of measurement performance of a certain measuring instruments needs to combine the used measurement standard and method. The result is represented by the expanded uncertainty of relative value Urel including k=2. In general, for calibration, the uncertainty of measurement performance of a certain measuring instrument should be less than 1/3 of error limit; for finalization calibration, the uncertainty should be less than l/5 of error limit. The verification of measurement standard uncertainty of measurement refers to the rationality verification of uncertainty.%测量结果的不确定度分析某一计量器具示值误差的测量结果不确定度分析要结合所使用的计量标准装置的型式、所采用的方法等进行，结果一般用包含k=2的相对值的扩展不确定度Urel表示。一般情况下，某一计量器具的测量结果的不确定度，对于检定，应小于计量器具误差限的1/3；对于定型检定，应小于计量器具误差限的l/5。计量标准的测量不确定度验证，该栏是指对所给的不确定度合理性的检验。
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