一、测量原理使用最大允许示值误差为±2″的测角仪,依据JJG70-2004《角度块》检定规程规定的方法对工作角为50°的二等角度块角度偏差进行连续测量,得到测量结果分别为-21″、-24″、-19″、-18″、-17″、-23″、-19″、-20″、-21″、-18″。取该组数据的平均值为输入测量的最佳估计值-20″,测量结果为49°59′40″。 First, the measurement principle using the maximum allowable indication error of ± 2 “goniometer, according to JJG70-2004” angle block “verification procedures specified method of working angle of 50 ° angle of the second-degree angle block for continuous measurement, get The results were -21 ”, -24“, -19 ”, -18“, -17 ”, -23“, -19 ”, -20“, -21 ”, -18“ The value is the best estimate of the input measurement -20 ”and the measurement is 49 ° 59’40".