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《天平检定规程》规定,天平不等臂性误差是右臂长为“+”、左臂长为“-”。在具体实践中,由于标牌零点位置和(+)、(-)的判断方法的不同,造成计算不等臂性误差的符号容易出错。同时给组合砝码的误差带来某些人为的因素,对加码式单盘天平更难于判别。本文提出解决这些问题的看法。一、问题的探讨按《天平检定规程》规定,可推导(详见《计量技术》杂志,1986年,第9期32页)出如下两类四种不等臂性误差的具体表达式: 1.标牌零点位于右面或零点位于中间而左
“Balance test procedures” stipulates that the balance arm ranging from the right arm length is “+”, left arm length “-”. In practice, due to the sign zero position and (+), (-) to determine the different methods, resulting in unequal arm error calculation of the symbol error prone. At the same time to the combined weight of the error caused by some artificial factors, plus single-disc balance more difficult to distinguish. This article proposes the solution to these problems. First, the discussion of the problem According to the provisions of the “test scale” can be derived (see “Measurement Technology” magazine, 1986, No. 9, page 32) the following two types of unequal four arm-specific error expression: 1 The sign zero is on the right or zero is in the middle and left