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本文介绍的是利用万能测长仪对游标卡尺专用量块的中心长度和平面平行性进行检定。为提高测量精度采取了二项措施:一是采用比较测量法,按照JJG100-81的规定应选用名义尺寸与其相同的高一等量块作为被测量块的标准。但为了卡尺专用量块的检定而专门建立一套传递系列是很不经济的。本文采用4等量块的组合体作为标准进行比较测量,可以圆满地解决这个问题;二是为了减小示值误差产生的影响,把万能测长仪尾座上的尾管换成光学
This article describes the use of universal length measuring instrument on the caliper dedicated measuring block center length and plane parallelism verification. To improve the measurement accuracy has taken two measures: First, the use of comparative measurement method, according to the provisions of JJG100-81 should choose the nominal size of the same high-level block as the measured block standard. However, it is uneconomical to create a special transmission series for the purpose of checking calipers. In this paper, a combination of 4 equal blocks as a standard for comparative measurement, you can satisfactorily solve this problem; the second is to reduce the impact of indication error, the end of the universal length gauge tailstock replaced by optical