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上海第二分析仪器厂生产的pHS-2型精密酸度计以及与它结构相仿的天津永红仪器厂的pHS-73型酸度计和江苏省金坛电子仪器厂的PXT-2型离子计,构造比较简单,近年来的送检量逐渐增多。为适应日常检定修理工作的需要,现以pHS-2型酸度计为例,将此类仪器的常见故障和修理方法作一简单介绍。因为往往有些同志将操作不当或电极损坏而导致的测量错误当成仪器出了故障。所以应首先了解操作方法是否正确,所用电极是否合格。然后,可检查仪器电源线、保险丝,变压器各绕组是否有烧毁、短路、脱开等现象,仪器的接“地”是否可靠等等。待排除了这些问
PHS-2 precision pH meter produced by Shanghai No.2 Analytical Instrument Factory and pHS-73 acidity meter of Tianjin Yonghong Instrument Factory and PXT-2 type ion meter of Jintan Electronic Instrument Factory in Jiangsu Province with the similar structure Relatively simple, in recent years, the inspection volume gradually increased. In order to meet the needs of routine testing and maintenance work, pHS-2 type acidity meter is taken as an example to introduce the common faults and repair methods of such instruments briefly. Because often some comrades will be improper operation or electrode damage caused by the measurement error as the instrument fails. So should first understand the method of operation is correct, the electrode is qualified. Then, you can check the instrument power cord, fuse, transformer windings have burned, short-circuit, disconnect and other phenomena, the instrument then “ground” is reliable and so on. To be ruled out these questions