Portable methane detection alarm instrument must be charged before each use to ensure its reliable work. Turn on the power supply in clean air, preheat 15 minutes, and observe whether the indication is zero. When measuring, lift or hang the sensor part of the instrument to the measuring point by hand, and read the gas concentration value after more than ten seconds; It can also be carried by the staff. When the gas exceeds the limit and gives an audible and visual alarm, it will focus on monitoring the ambient gas and take corresponding measures. Attention should be paid to when using the instrument:

1, protect the instrument, and violent beating and collision are strictly prohibited during carrying and using; Do not get wet or soaked in water.

2. If the voltage is insufficient in use, stop using it immediately, otherwise it will affect the normal work of the instrument and shorten its service life.

3. The thermal catalytic (thermal effect) gas detector is not suitable for use in areas containing sulfur dioxide and where the gas concentration exceeds the allowable value of the instrument.

4. Check the zero point, test accuracy and alarm point of the instrument regularly to make the instrument measurement accurate and reliable.