Power supply check: ensure that the combustible gas alarm has sufficient power supply, normal battery power or stable AC power supply, so as to ensure that the combustible gas alarm can work normally during the self-test.

Interface inspection: check whether the various interfaces of the combustible gas alarm are in good condition without looseness, corrosion or damage to ensure that there will be no poor contact or signal transmission problems during connection.

3. preparing the self-test environment

Clean Environment: the self-inspection of combustible gas alarm should be avoided in an environment with a lot of dust, oil and other pollutants, so as not to affect the accuracy of the test results. Ensure that the self-test environment is clean and tidy.

Safety environment: Select a well-ventilated site free of flammable and explosive materials for self-inspection to ensure the safety of the self-inspection process of the combustible gas alarm.

Appropriate temperature and humidity: Ensure that the temperature and humidity of the self-test environment are appropriate, and avoid extreme temperature and humidity damage to the combustible gas alarm or affect its performance.

4. shut down the device