Calibration device and method for gas concentration meter

Abstract

The invention discloses a calibration device for a gas concentration meter. The calibration device comprises gas balance equipment, an acquirer, a mass flow controller and a meter calibration platform, wherein the gas balance equipment has a gas inlet for feeding gas; the acquirer is mounted in the gas balance equipment and is used for acquiring the actual concentration of the gas in the gas balance equipment; the mass flow controller is connected with the gas inlet of the gas balance equipment; the meter calibration platform is used for receiving preset concentration and the volume and the actual concentration of the gas balance equipment, sending a gas feeding instruction according to the preset concentration and the volume and the actual concentration of the gas balance equipment, controlling the output from the mass flow controller to a gas source of the gas balance equipment, sending a detection instruction, receiving a concentration to be calibrated acquired by the gas concentration meter according to the detection instruction, and sending a calibration instruction or a normal gas concentration meter working state instruction according to the concentration to be calibrated and the actual concentration. The invention further provides a corresponding calibration method for the gas concentration meter. According to the device and the method, the working efficiency of the whole calibration process can be improved, and the gas concentration meter can be quickly calibrated.

Description

technical field [0001] The invention relates to the calibration field of instruments and meters, in particular to a gas concentration meter calibration device and method. Background technique [0002] The leakage of toxic and harmful gases in the equipment will cause harm to the staff and equipment. For example, the leakage of sulfur hexafluoride (SF6) in the indoor substation, the leakage of ammonia gas in the denitrification area of ​​the thermal power plant, etc. may endanger life and safety in severe cases; the hydrogen leakage of the generator set is serious Therefore, it is necessary to install gas leakage alarm equipment on relevant occasions, and in order to ensure the normal operation of the gas leakage alarm equipment, the gas leakage alarm equipment needs to be tested regularly. The detection of gas leakage alarm equipment is usually to calibrate the gas transmission equipment in the gas leakage alarm equipment, that is, the gas concentration instrument. [0003]...

AI Technical Summary

Problems solved by technology

However, in actual use, it is necessary to replace all the gas in the container or box when a standard gas of a specific concentration is introduced, so that the gas concentration in the container or box is consistent with the concentration of the standard gas that is introduced, and it takes a long time in actual application. The larger the volume of the container or box, the longer the replacement time required, so the inspection cycle is longer

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