在砝码检定规程(JJG99—81)中规定:“在检定过程中,应做到所使用的已知质量的全部基准、标准砝码的综合极限误差,连同所用的相应精度天平示值的综合极限误差,其总合不大于被检砝码检定精度的五分之四。”“被检砝码必须是在相应精度的天平上,通过与标准砝码相比较来进行检定。”因此,天平精度直 In the test procedure of weight (JJG99-81), it is stipulated that: “During the test, all benchmarks of the known mass used, the integrated limit error of the standard weight, together with the combination of the indicating values ​​of the corresponding precision balances used Limit error, the sum of not more than four-fifths of the test weight test accuracy. ”“ The test weight must be on the corresponding accuracy of the balance, compared with the standard weight to test. ”Therefore, the balance Straight accuracy