Uncertainty Analysis of Flow Measurement of the VOCs Sampler

Liu Wei, Li Li, Wang Zhiyu, Pan Qin, Huang Xin

Abstract

In this paper, the flow measurement uncertainty of the VOCs sampler is analyzed in detail which is widely applied in environmental monitoring, medical and health care, factories, and mining enterprises. Based on the detection of the soap film flow-meter standard device and the mass flow-meter standard device, the mathematical and physical uncertainty model of the VOCs sampler is derived and obtained. The flow measurement uncertainty is evaluated and analyzed respectively based on the mathematical and physical uncertainty models of two standard devices. The relative expansion uncertainty of the soap film flow-meter standard device and the mass flow-meter standard device for detecting VOCs sampler is calculated to be 0.9 % and 1.4 % respectively. There is a difference in the relative expanded uncertainty of the two standard devices for detecting VOCs samplers, which is mainly due to the difference in the standard uncertainty introduced in the standard device and the repeatability test. In particular, the above process and result analysis are effective for the VOCs sampler with the high-precision electronic flow-meter as the standard conditions.

Keywords

VOCs Sampler; Flow Measurement; Uncertainty

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IMEKO-TC9-2019-104.pdf

DOI

10.21014/tc9-2022.104

IMEKO TC

TC9 - Flow Measurement

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