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由于pHS-29A型酸度计体积小、重量轻,可以交直流供电使用,因此广泛用于研究所、工厂、矿场化验室及现场测量水溶液的pH值、电极电位等等。现将该仪器常见故障及排除方法介绍给同行参考。当pH计发生故障时,首先要弄清故障来自电计还是电极,然后分别排除。如果电计和pH标准缓冲溶液无误的情况下测量结果不正常,则故障来自电极;电极和pH标准缓冲溶液无误的情况下测量结果不正常,故障就来自电计。
Because pHS-29A type acidity meter small size, light weight, can be AC-DC power supply, it is widely used in research institutes, factories, mine laboratories and field measurement of aqueous solution pH, electrode potential and so on. The instrument is now common fault and troubleshooting introduced to peer reference. When the pH meter fails, first of all to find out the fault from the meter or the electrode, and then were excluded. If the meter and pH standard buffer solution is correct, the measurement result is not normal, then the fault comes from the electrode; electrode and pH standard buffer solution is correct, the measurement result is not normal, the fault comes from the meter.