When the value is zero or the alarm value is not reached in the air, it will also alarm
1. Check whether the various alarm value parameters of the gas detector have been modified;
2. Check whether the alarm mode and alarm mode of the gas detector have been modified;
3. Check whether the alarm status of the gas detector is a concentration alarm or other fault alarm, the concentration alarm will appear A1 or A2, and the red indicator light will flash;
4. If the gas detector alarm caused by manual modification can be solved by restoring the factory settings, the fault alarm needs to be further checked for short circuit, open circuit, poor contact, sensor failure, etc., or sent back to the manufacturer for inspection.
