一、砝码质量允差与测量不确定度的要求JJG99-1990《砝码检定规程》将砝码按修正值的使用与否划分为等砝码与级砝码两类。对于等砝码,修正值是明示在测量结果之中;对于级砝码,修正值只是隐含在测量结果之中,只有当新生产或首次检定时才需要明确其大小。作为某一标称值下砝码的 First, the weight quality tolerances and measurement uncertainty requirements JJG99-1990 “weight test procedures” the weight according to the use of the revised value is divided into two categories such as weight and grade weight. For equal weights, the corrections are explicitly stated in the measurement; for class weights, the correction is only implicit in the measurement and is only required for new production or for the first time. As a nominal value of the weight