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如果一台天平按规程要求检定后其变动性超差，就要认真分析其原因，逐个排除解决。下面以TG328型天平为例进行讨论和分析。首先要确认天平的三把玛瑙刀口应该是完好的，而且对天平的各个零部件进行了认真的清洗，然后分析其变动性超差的原因，归纳起来大致有以下几个方面：1．
If a balance according to the procedures required by the test changes in the ultra-poor, it is necessary to carefully analyze the reasons one by one to solve. The following to TG328 type balance for discussion and analysis. First of all, to confirm the balance of the three agate knife edge should be intact, but also on the various parts of the balance were carefully cleaned, and then analyze the reasons for the excess of variation, summed up in the following aspects: