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一、前言JJG797-2013《扭矩扳子检定仪检定规程》新增了标准扭矩扳子检定方法,取消了扭矩标准机检定方法。以前将扳子检定装置上使用的传感器拿到标准扭矩机上进行检定的方法不再适用。新规程需要一款测量准确度高的扳手直接对扳手检定装置进行检定。目前国内外大多数数显扳手只是作为普通的工作扳手,测量准确度只有±1%,不能满足要求。国外
I. Introduction JJG797-2013 “torque wrench tester verification procedures” added a new standard torque wrench verification method, canceled the torque standard machine verification method. The previous method of using the sensor on the calibration device of the wrench to take a test on a standard torque machine no longer applies. The new procedure requires a wrench with high measurement accuracy to verify the wrench verification device directly. At present, most digital display wrenches at home and abroad only as an ordinary working wrench, the measurement accuracy of only ± 1%, can not meet the requirements. foreign