Uncertainty Determination in Measurements Using a Gerdien Tube
Light negative air ions demonstrably exhibit positive influence on the human organism. The concentration of these ions can be effectively used as the integral criterion for the evaluation of air purity, and there also exists a multitude of other applications. The presented aspiration method enables us to establish the concentration of air ions in the atmosphere. In a Gerdien tube fitted with a one-piece inner electrode, measurement of the saturation characteristics must be performed to facilitate the determination of the air ion mobility spectrum. This method is very sensitivity to noise and leakage current. In this paper is determination uncertainty of type B in Gerdien tube and electrometric amplifier. This method is very sensitive to noise and leakage current. In this paper, the determination of uncertainty B in a Gerdien tube and an electrometric amplifier is presented. The uncertainty depends on the input bias current and input noise current of the applied operational amplifier. Another significant source of B uncertainty is the temperature and time instability of the Teflon insulator.
Z.Roubal Z.Szabo M.Steinbauer
Department of Theoretical and Experimental Electrical Engineering Brno University of Technology, Technicka 12, Brno 616 00, Czech Republic
国际会议
Progress in Electromagnetics Research Symposium 2014(2014年电磁学研究新进展学术研讨会)
广州
英文
1902-1906
2014-08-01（万方平台首次上网日期，不代表论文的发表时间）