How often do gas alarms used in coal mines need to be calibrated?

Coal mine gas alarm monitoring equipment must be regularly debugged and calibrated at least once a month. The methane sensor should be calibrated every 7 days. Standard gas samples must be used for calibration and comply with relevant regulations. The methane over-limit power-off function must be tested every 7 days. At the same time, carefully record the calibration and debugging.

Monitoring equipment used in coal mines shall be maintained at least once every three days, and inspection records shall be kept strictly.

The monitoring team shall establish equipment and instrument accounts, gas detector www.dehsm.com/category- 1 62.html sensor use management card, monitoring device failure registration form, inspection records, daily report of central station operation, maintenance records, daily and quarterly report of device use and monitoring system diagram, and the data retention period shall exceed1year.

The gas monitoring center station should have 24-hour uninterrupted normal monitoring equipment with good functions, print reports on time and analyze various information parameters in time.

The daily monitoring report of mine safety monitoring system shall be submitted to the mine manager and technical director for review.