故障现象：定标时液流中有时断时续的小气泡，当小气泡恰好位于电极腔（或称电极膜）处时，定标失败，仪器不能正常工作。分析及检修：首先怀疑是有关管道半堵塞或渗漏液流不畅或有漏气所致。为此；对液流通道作了认真的检查和疏通，但故障依旧。又怀疑是泵管久用后弹性减... Symptoms: The small bubbles that sometimes break in the flow during the calibration process. When the small bubbles are located at the electrode chamber (or electrode film), the calibration fails and the instrument does not work properly. Analysis and overhaul: First of all, it is suspected that the pipeline is half blocked or the flow of leakage is poor or there is leakage. For this reason, the liquid flow channel was carefully checked and dredged, but the failure remained. Suspected that the pump tube after the use of elastic reduced ...