Questions about combustible gas detectors
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Combustible gas detectors measure many media such as formaldehyde, methane, dioxopentane, methyl formate, etc. So what kind of standard gas is used for daily inspection and calibration? Our company uses methane, but I don’t know if it complies with regulations. JJG693-2011 Calibration Regulations for Combustible Gas Detection and Alarms How to understand the same types of gases here?
His "as: ” Only partially gas. I wonder if there are other gases
If it is a pure gas, then use the gas you need to detect and make a sample gas for calibration to see if it is toxic or flammable. If it is flammable, you can use methane or isobutane instead. If it is toxic, it cannot be used. You must use the same gas for calibration.
Methane can be used as the combustible gas standard gas.
The key now is to follow the regulations. The regulations do not clearly state that it is methane, but only refer to similar gases.
Thank you everyone, I found the answer I was looking for. Classification of combustible gases: Class A and Class B Class A combustible gases are a branch of combustible gases, mainly referring to those with a lower explosive concentration limit less than 10%. Common ones include hydrogen, hydrogen sulfide, etc. Class B flammable gas, gas with lower explosive concentration limit ≥10%