Calibration system and calibration method for ndir gas sensors

A calibration system for NDIR gas sensors, comprising:

• a client-server computer network with calibration software, a relay module, a gas source group, a mass flow controller, a high and low temperature chamber, a gas analyzer, and a calibration tooling rack group, wherein the client-server computer network is installed with calibration software (developed according to the calibration method) to control and execute broadcasting-style calibration;
• the calibration tooling rack group is installed in the high and low temperature chamber, and a plurality of calibration tooling plates are installed on the calibration tooling rack group;
• the NDIR gas sensors to be calibrated are detachably installed on the corresponding calibration tooling plates and connected with the corresponding calibration tooling plates;
• and a storage medium is arranged inside each NDIR gas sensor and used for storing calibration data;
• each gas source in the gas source group is connected with the high and low temperature chamber, respectively, through a gas path, and each gas path is provided with a pressure sensor and a solenoid valve;
• the relay module is connected with the pressure sensor and the solenoid valve respectively;
• and the mass flow controller is connected with the solenoid valve through the gas path for adjusting the size of the gas flow;
• the gas analyzer is connected with the high and low temperature chamber for collecting the actual gas concentration to be measured in the high and low temperature chamber;
• the client-server computer network with calibration software is connected with the relay module, the mass flow controller, the high and low temperature chamber, the gas analyzer, and each of the calibration tooling plates to realize control or data exchange.