国产携带型电位差计303型、703型、UJ2型、UJ23型、UJ22—1型等虽精度较低,但数量很大,作用十分重要。这些电位差计大多使用于工厂车间现场,运用频繁,环境条件较差,经过一段时间使用后,不合格率较高。日常工作要求对这些电位差计迅速进行修理并提高修理质量。下面,就我们在修理中碰到的一些问题作一介绍,以供参考。一、303型电位差计的修理303型电位差计是联研电工仪器厂的早期产品,应属0.2级,其主要用途为检定,校正指示型及指 Domestic portable potentiometer 303 type, 703 type, UJ2 type, UJ23 type, UJ22-1 type, etc. Although the accuracy is low, but a large number, the role is very important. Most of these potentiometer used in the factory floor, frequent use, poor environmental conditions, after a period of use, the higher failure rate. Routine work requires prompt repair of these potentiometers and improved repair quality. Here, we encountered some problems in the repair to make an introduction for reference. First, the 303-type potentiometer repair 303-type potentiometer is a joint research electrical instruments factory early products, should be 0.2, its main purpose is to test, correct instructions and means