电子电位差计经过长期运行,其测量桥路中的滑线电阻被磨损,阻值均匀性变坏,使仪表个别示值超差而不合格。修理方法是用砂布磨擦旧滑线电阻的非磨损区间,使其各处被均匀“磨损”,恢复其阻值均匀性。显然,准确区分磨损与非磨损区间是关键。解决这一问题,如借助专门仪器,则欠简单; After long-term operation of the electronic potentiometer, the slip resistance of the measuring bridge is worn, and the uniformity of the resistance is deteriorated, so that the individual indication of the meter is out of tolerance and unqualified. Repair method is to use the emery cloth abrasion friction of the old non-wear interval, so that it is uniform throughout the “wear” to restore the uniformity of resistance. Obviously, the accurate distinction between wear and non-wear interval is the key. To solve this problem, it is not easy to use special equipment.