Testing of metrological parameters of analyzers of explosive gases in laboratory conditions

Abstract

Introduction. When training fire safety specialists, it is practically important to acquire skills in assessing the fire hazard of accidents with the release of flammable gases (GG) and vapors of flammable liquids (FL). The task of detecting hazardous concentrations of these substances is performed by gas analysis systems, the main element of which is gas analyzers. Goals and objectives. The aim of the study is to create a gas analysis installation for determining the main metrological characteristics of gas analyzers in a training laboratory. The tasks include the analysis of an existing installation that complies with the current standard, consideration of the design of the test chamber and the methodology for its application for the study of gas analyzers with a diffusion supply of the analyzed medium. The methods include system analysis and mathematical assessment of physical processes occurring in the test chamber during the preparation and conduct of research. Results and discussion. The article proposes and substantiates the design of a laboratory facility, in which a given volumetric concentration of the explosive substance under investigation is created in a special chamber with the help of a dispenser. Mathematical expressions have been obtained to determine the required amount of flammable liquids. The method of preparation of the installation and options for its use for laboratory work are considered. This technique is simple and ensures the safety of industrial gas analyzers research. Conclusions. The article substantiates the design of the gas analysis unit using a special chamber as a source of the gas mixture (GM). A mathematical model of the formation of HMs with a given volumetric concentration of flammable liquids vapors is obtained, based on the Mendeleev-Cliperon equation. The technique of preparing a chamber for determining the metrological characteristics of gas analyzers in a training laboratory is considered. Keywords: explosive gas, gas analyzer, laboratory facility, ideal gas equation, test chamber