Wide concentration range standard gas distributor with correction function and correction method of standard gas distributor

Abstract

The invention relates to the technical field of gas detectors, in particular to a wide concentration range standard gas distributor with a correction function and a correction method of the standard gas distributor. The provided wide concentration range standard gas distributor comprises a carrier gas pathway, a first diluent gas pathway and a second diluent gas pathway; the carrier gas pathway and the first diluent gas pathway are connected in parallel with a first mixing chamber, a first outlet of the first mixing chamber is connected with an exhaust port, a second outlet and the second diluent gas pathway are connected in parallel with a second mixing chamber, and the second mixing chamber is connected with a standard gas outlet; the second diluent gas pathway is provided with a first flow path control valve and a second flow controller, and a third flow controller and a second flow path control valve are arranged at the first outlet of the first mixing chamber; the second flow path control valve is connected with the first flow path control valve. The wide concentration range standard gas distributor is simple in structure and the range of concentrations of the prepared standard gas is wide; during correction, the gas path where correction is performed continues to be involved in following correction, the correction structure flow path is simplified, and the gas distribution accuracy is high.

Description

technical field [0001] The invention relates to the technical field of gas detectors, in particular to a large concentration range standard gas distribution instrument with calibration and a calibration method thereof. Background technique [0002] In gas detection and analysis instruments, it is often necessary to use a gas distribution instrument to obtain standard gases of different concentrations to calibrate the instrument, and with the increasingly stringent requirements for the accuracy of gas concentration detection in the field of industrial testing, the standard gas Concentration requirements are also getting higher and higher. [0003] If the existing standard gas distribution instrument needs to be configured with mercury standard gas, the Hg standard gas generator uses the principle of saturated mercury vapor or chemical reaction to generate elemental mercury, and takes the mercury vapor out through the carrier gas all the way to form a certain concentration of ...

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Problems solved by technology

[0006] The first purpose of the present invention is to provide a large concentration range standard gas gas distribution instrument with calibration, which has a simple structure, a large concentration adjustment range, convenient adjustment and high gas distribution accuracy, so as to solve the existing problems of the existing gas distribution device. Large error accumulation, low gas distribution accuracy and poor accuracy and stability of gas concentration

[0007] The second purpose of the present invention is to provide a method for calibrating a large concentration range standard gas distribution instrument with calibration, which has a simple structure, a large concentration adjustment range, convenient adjustment and high gas distribution accuracy, so as to solve the problem of existing distribution problems. The gas instrument has the problems of large error accumulation, low gas distribution accuracy and poor accuracy and stability of gas concentration

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