计由于内径表是用比较法测量内尺寸的量具,所以,在测量前要根据被测量尺寸的公称值,选取测量基准来校对内径表的零位。现就两种校对内径表零位方法加以分析。1郾用千分尺校对内径表零位在生产中,经常看到有些检验人员用外径千分尺校对内径表的零位。这种做法,将会产生较大误差 Since the inner diameter meter is a measuring gauge for measuring the inner dimensions by the comparative method, the zero point of the inner diameter meter should be calibrated according to the nominal value of the measured dimension before measurement. Now two kinds of proofreading diameter meter zero method to be analyzed. 1 校 Calibrating the zero point of the ID gauge with a micrometer In production, it is often observed that some inspectors calibrate the zero point of the ID meter with an OD micrometer. This approach will have a greater error