Influence of Concentration Uniformity on the Detection Results of Sniffer Probe Accumulation Method
The relationship between the displayed value of the leak detector and the helium concentration of the gas was derived theoretically and verified by experiments.In addition,the influence of helium concentration on the detection results of sniffer probe accumulation method was studied experimentally with large tank as the object.The results show that the displayed value of the leak detector is linearly related to the helium concentration of gas in the accumulation chamber when the temperature and inlet pressure are constant.While for sniffer probe accumulation method,the uniformity of helium concentration has a great influence on the detection results.The gas in the accumulation chamber must be stirred.After stirring for 10 min or more,the uniformity of helium concentration has little influence on the detection results with ensured reliability of tank leak detection.