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质量单位的基准器,是一个一千克砝码。但在科学研究与生产实践中,需要测量的质量是各种各样的。这样,就必须配备质量从小到大、其个数最少、但能组成任意质量量值的一组砝码,这就是我们通常所说的“砝码组”。在一组砝码中,各个砝码的质量值,是按照一定的方式与相应的高一级标准砝码进行组合比对得到的。我国目前采用的组合比对法,基本上是沿用苏联很早以前提出的方法,对于其比对方案、误差评定方法等,都有必要再进行认真的分析和探讨,以便使之更加完善和严谨。下面以组合方式为5、2、2、1型的克组
The base unit of quality unit, is a one kilogram weight. However, in scientific research and production practice, the quality of measurement needs to be varied. In this way, it is necessary to equip a group of weights of small to large masses with the smallest number but of any mass mass. This is what we commonly call a “mass group.” In a group of weights, the weight of each weight value, according to a certain way and the corresponding high level of standard weight combination of the results obtained. The combination ratio method currently used in our country basically follows the method proposed very early by the Soviet Union and requires careful analysis and discussion on its comparison scheme and error assessment method in order to make it more complete and precise . The following combination of 5,2,2,1-type grams group