Abstract : the error source of raster indicator verification instrument is analized . the synthetic standard uncertainty and expansion uncertainty of the standard unit is determined . the reliable basis for the verification of indicating type measuring tool is provided 文摘:分析了光栅式指示表检定仪标准装置的误差来源，确定了该标准装置的合成标准不确定度及扩展不确定度，为指示表类量具的检定提供了可靠性依据。
