Factors affecting the measurement of oxygen analyzers
Oxygen Analyzer is a measuring instrument used to detect the oxygen content of the gas, in the steel, metallurgy, chemical and other industries have a very wide range of applications. In the oxygen content analysis, especially the trace oxygen analysis, because the air oxygen content of up to 21% O2, so if improper handling can easily lead to contamination of the sample and interference, the results of the analysis data is not correct. The main reason is the improper operation of the oxygen analyzer. Below, Xiaobian will give you some tips on the factors that affect the oxygen analyzer.
1. Leakage. Oxygen analyzers must be leaked strictly before they are first enabled. Oxygen analyzer only in the tightly leaking under the premise to get accurate data results. Any connection points, solder joints, valves, etc. are not tight, will lead to oxygen in the air into the pipeline and oxygen inside the oxygen analyzer, resulting in high oxygen content results.
2. pollution. When reusing the oxygen analyzer, it is important to note that the air is leaked into the sampling line of the oxygen analyzer and that the air leaked into the oxygen analyzer must be carefully purged so as not to allow large amounts of oxygen to pass through the oxygen analyzer Of the sensor to extend the sensor life. In the pipeline system purification process, in order to shorten the purification time, need to have a certain method, the general use of high pressure deflation and small flow blowing alternately can quickly purify the oxygen analyzer pipeline.
3. Pipeline material selection. Oxygen analyzer pipe material and surface roughness will also affect the sample gas oxygen content changes. Generally should not use plastic pipe, rubber tube as a connecting pipe. Oxygen analyzer is usually used brass or stainless steel tube, for ultra-micro analysis (referring to <0.1ppm) must be polished stainless steel tube.
4. The simplification and cleanliness of the airway system. Oxygen analyzer microanalysis requires the effective elimination of air pollution on various types of pipe fittings, valves, heads and the like. Therefore, it is necessary to simplify the oxygen analyzer gas system as much as possible, the use of small connectors such as dead ends. In addition, to avoid the use of water seals, oil seals and wax seal and other equipment to prevent the dissolution of dissolved oxygen caused by pollution, but also to avoid the introduction of gas from the gas analyzer to the pipeline to increase the pollution caused by pollution purification equipment. Only in this way can we ensure that the system is clean and that the resulting data is accurate.