本标准为根据ASME B89测试协议验证尺寸测量仪器时获得的测试值的不确定度提供了评估指南。该范围仅限于在额定运行条件下，试验被测物是指示误差的情况；因此，任何操作条件（包括未测试的条件）下可能出现的测试测量值，如“可能最坏”的指示误差，不在本标准的范围内。

This Standard provides guidelines for evaluating the uncertainty of test values obtained when verifying dimensional measuring instruments1 to an ASME B89 testing protocol. The scope is limited to the case in which the test measurand is the error of indication at a rated operating condition; hence, test measurands such as the "worst possible" error of indication that might occur at any operating condition (including those conditions that are not tested) are outside the scope of this Standard.