1. Leakage. The zirconium oxide oxygen analyzer must be strictly leak-detected before it is first used. The oxygen micro-oxygen analyzer can obtain accurate data results only under the premise of strict leak-proof. Any connection points, welding points, valves, etc. are not tight, which will cause oxygen infiltration in the air to enter the pipeline and the inside of the oxygen analyzer, resulting in a high oxygen content.
2. Pollution. When reusing the zirconia oxygen analyzer, it is necessary to pay attention to whether there is air leakage when connecting the sampling line of the oxygen analyzer, and the air leaking into the oxygen micro-oxygen analyzer must be carefully blown out to avoid the large amount of Oxygen passes through the sensor of the oxygen micro-oxygen analyzer to extend the life of the sensor. In the process of purifying the pipeline system, in order to shorten the purification time, a certain method is required. Generally, high-pressure gas release and small flow blow-off are used alternately to rapidly purify the oxygen micro-oxygen analyzer pipeline.
3. Selection of pipe material. The pipeline material and surface roughness of the oxygen micro-oxygen analyzer will also affect the change of oxygen content in the sample gas. Generally, it is not suitable to use plastic pipes or rubber pipes as connecting pipes. Oxygen micro-oxygen analyzers usually use copper or stainless steel tubes. For ultra-micro analysis (refer to <0.1ppm), polished stainless steel tubes must be used.
4. Simplification and cleanliness of the gas circuit system. The trace analysis of the zirconia oxygen analyzer must effectively eliminate the contamination of the sample gas caused by the dead angles in various pipe fittings, valves, and gauges on the gas path. Therefore, the gas circuit system of the oxygen micro-oxygen analyzer should be simplified as much as possible, and the connecting parts with small dead angles should be selected. In addition, avoid the use of water seals, oil seals and wax seals to prevent pollution from escaping from dissolved oxygen. It is also necessary to avoid adding pollution-prone purification equipment to the pipeline leading from the sample gas to the oxygen micro-oxygen analyzer. Only in this way can the system be clean and the data obtained be accurate.
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