上海第二分析仪器厂生产的pHS-29A型酸度计,具有外形美观、体积小、重量轻、性能良好、交直流电源两用等特点。因此它不仅适用于厂矿、医院的化验室,尤其适用于生产现场和野外作业。它的标称直读范围是:mV=0～1000,pH=2～12,也可以扩展到pH=0～14,并且有0～10毫伏直流输出,配上适当的记录式电子电位差计就可以自动记录酸度。由于有以上优点,目前该仪器使用相当普遍。本文就该仪器的检修和校验作一简单介绍,供使 Shanghai Second Analytical Instrument Factory pHS-29A-type acidometer, with a beautiful appearance, small size, light weight, good performance, AC and DC power dual-use features. Therefore, it is not only suitable for factories, hospitals, laboratories, especially for the production site and field operations. Its nominal direct read range is: mV = 0 to 1000, pH = 2 to 12, also extended to pH = 0 to 14, and has 0 to 10 milli-volts DC output, coupled with the appropriate recording-type electronic potential difference Meter can automatically record acidity. Due to the above advantages, the current use of the instrument is quite common. This article on the instrument overhaul and calibration for a brief introduction for