According to the requirements of the specification, the configuration and appearance inspection of fire extinguishers shall be carried out at least once a month, and the inspection shall be carried out at least once a half month in the waiting room (airport, ship), singing, dancing, entertainment, screening and entertainment and other crowded places, as well as in the storage yard, tank farm, gas station, boiler room, basement and other places, and the inspection shall be recorded.

During the visual inspection of the fire extinguisher, the driving gas pressure of the fire extinguisher shall be checked as follows:

There are red, green and yellow color areas on the dial of the fire extinguisher pressure gauge:

1. The pointer points to the yellow area, indicating that the internal pressure of the fire extinguisher is too high and there is a danger of self explosion.

2. Pointing to the green area indicates that the internal pressure of the fire extinguisher is moderate and can be used.

3. Pointing to the red area indicates that the internal pressure of the fire extinguisher is insufficient and it cannot be used normally, which requires a new fire extinguisher.