天平不等臂性误差Y是天平计量性能的一项重要指标。在计算式中的两个正负号需根据天平的标牌形式与小砝码k所在的秤盘分别确定。在实际工作中,刚刚从事检定工作的同志常因天平标牌形式的不同或k位置的变化,将式中的符号搞错,给正确判断天平不等臂性误差的实际方向带来一定的困难。同样, 用替代法或交换法检定 Balance ranging from arm error Y is an important indicator of balance measurement performance. The two signs in the formula are to be determined separately from the weighing plate in the form of a balance and the weighing pan in which the small weight k is located. In practical work, the comrades who have been engaged in the accreditation work often make mistakes in the signs of the formula because of the difference in the form of the nameplate or the change of the k-position, which brings some difficulties in correctly judging the actual direction of the arm-type error in the balance. Similarly, the alternative method or exchange method test