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Precautions for Using the Oxygen Analyzer

When the oxygen analyzer performs oxygen specific gravity analysis, especially trace oxygen analysis, because the specific gravity of oxygen in the gas is as high as 21% O2, if it is not handled properly, it will easily cause contamination and interference to the sample, resulting in incorrect analysis result data. The reason is caused by improper operation. Here are just a few factors that affect the determination of the oxygen analyzer.

  1. Leakage. The oxygen analyzer must be leak-tested before it is first commissioned. The oxygen analyzer can only obtain accurate data results under the premise of no leakage. Any tightness at any connection point, welding point, valve, etc. will cause the oxygen in the gas to reverse osmosis into the pipeline and the inside of the oxygen analyzer, resulting in a high oxygen content.
  2. Pollution. When re-operating the oxygen analyzer, you must first pay attention to whether there is leakage of gas when connecting the sampling line of the oxygen analyzer, and carefully blow out the gas leaking into the oxygen analyzer to avoid a large amount of oxygen passing through the sensor of the oxygen analyzer. Extend sensor life. In the purification process of the pipeline system, in order to shorten the purification time, a certain method is required. Usually, high-pressure deflation and small flow blow-off are used alternately to quickly purify the oxygen analyzer pipeline.
  3. Selection of pipeline materials. The pipe material and surface roughness of the oxygen analyzer also affect the change of the specific gravity of oxygen in the sample gas. It is generally not suitable to use plastic pipes, rubber pipes, etc. as connection pipes. Oxygen analyzers usually use copper or stainless steel tubes. For ultra-micro analysis (refer to <0.1ppm), polished stainless steel tubes must be used.
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