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在检定机械天平的分度值时,有时会出现左、右盘分度值不一致的情况,这就是偏感。对于具有微分标牌的天平,当左、右盘加上测定分度值所用的小砝码,所引起的分度数变化应相等,若不相等则两者之间不得大于两个分度,如果大于两个分度,需要进行调整。排除因示值变动性引起左、右盘分度值不一致的现象,产生偏感的原因主要有以下几点:1.由于刀刃的锐利程度及刀承的光洁度不同,造成刀刃与刀承接触时的摩阻不等,而形成的偏感。
When checking the graduation value of the mechanical balance, there may be some cases where the left and right disc graduation values are inconsistent, which is partial sensation. For balances with differential signage, when the left and right discs are added with the small weights used to determine the graduation value, the graduation changes should be equal. If they are not equal, they should not be greater than two graduations. If they are greater than Two degrees, need to be adjusted. Excluding the change of value caused by the left and right disc indexing inconsistencies, the reasons for bias are mainly the following: 1. Due to the sharpness of the blade and knife bearing different finish, resulting in blade and knife bearing contact The friction range, but the formation of partial feelings.