How to calibrate the ventilation of gas detector?
Nowadays, with the continuous development of the industrial field, the toxic and harmful substances in industrial production also increase, and the gas detector has become a part of industrial production. It can detect the concentration of toxic and harmful substances in production work and give an alarm when it reaches the preset alarm value to ensure the personal safety of front-line workers. So how does the gas detector perform ventilation calibration?
Calibration procedure of gas detector:
Calibration procedures include zero calibration (fresh air calibration) and sensor calibration with known gas concentration (range calibration).
Perform zero calibration to establish a baseline reading of the atmosphere known to be free of toxic and combustible gases.
The baseline reading of carbon monoxide, hydrogen sulfide and combustible materials is zero, and the baseline reading of oxygen is 20.9%.
Range calibration is to adjust the response of gas monitor to match the response of known gas concentration. The sensor may lose its sensitivity due to normal degradation, exposure to high concentration gas or sensor poisoning.
Perform range calibration to ensure that the gas detector detects the target gas within specific operating parameters.
Equipment required for gas detector to perform ventilation calibration:
Calibration gas with the following concentrations (concentration may vary by brand/model)
100 ppm CO
25 ppm H2S
2.5Vol% CH4 (50% LEL)
18.0Vol% O2
polyethylene tube
The gas flow regulator can provide 0.5 LPM.
Calibration adapter
The above information about how to calibrate the gas detector is shared here for everyone. The gas detector can be widely used in petroleum, chemical industry, coal, etc. In the process of production, processing and transportation, various flammable and explosive gases or liquids may leak.
