June 3-5, 1991, West Virginia University, Morgantown, WV Y. J. Wang ... MAINTENANCE OF SYSTEMS The primary maintenance concerns of the AMS are the calibration, installation and moving of CO ... Five systems were installed which were not required to monitor belt entries. ... Four of the alarm unit failures were due to dead batteries, two due to burned out light bulbs, four due to poor electricalanbsp;...
|Title||:||Proceedings of the 5th US Mine Ventilation Symposium|
|Author||:||Y. J. Wang|
|Publisher||:||Society for Mining Metallurgy - 1991|