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投影测长机是精密测量的主要仪器之一,用途很广,其示值误差的准确与否直接关系量值的准确性。投影测长机分米尺分划板旁边的两个小螺钉是调整示值误差的关键,分别位于分米尺分划板的左侧和右侧,这两个小螺钉和分米尺分划板的内部是“跷跷板”式结构,下面介绍如何通过两个小螺钉调整投影测长机分米尺的示值误差。在校准测长机时,如果发现200mm处示值误差超差,先卸掉扣在分米尺分
Projection length measuring machine is one of the main instruments of precision measurement. It has a wide range of uses. The accuracy of the indication error is directly related to the accuracy of the value. Projection length measuring machine two meters next to the dichroic reticle is the key to adjust the indication error, respectively, located on the left and right of the sub-reticle reticle, the two screws and the division of the scale Inside the board is a “seesaw” type structure, the following describes how to use two small screws to adjust the projection length measuring machine meter indication error. When calibrating the length measuring machine, if it is found that the indication error of 200mm is out of tolerance, remove the buckle at the meter