MSHA HANDBOOK SERIES - PH13-V-1 - Mine Safety and Health ...

COAL MINE SAFETY AND HEALTH
GENERAL INSPECTION PROCEDURES HANDBOOK CHAPTER 3
accepted by A&CC must be installed and maintained as evaluated and must
have an MSHA acceptance label attached to the blue outstations, classified
sensors, and classified barriers. The failure to use systems maintained in
permissible condition should be cited under §§ 75.503 (Permissible electric face
equipment; maintenance), 75.507 (Power connection points), or 75.1002
(Installation of electric equipment and conductors; permissibility) as
appropriate.
The following checklist details the salient parts of an inspection of an AMS
network. (Refer to Carbon Monoxide and Atmospheric Monitoring Systems
Inspection Procedure Handbook for further guidance.)
a. Surface Inspection
1. Review records of sensor calibrations and records of alert, alarm and
malfunction signals;
2. Review records of weekly functional test; and
3. Verify the names of designated AMS operators and other appropriate
personnel.
Review the map or schematic
1. Determine if the schematic and other maps are properly displayed and
are properly updated.
Observe operation of system
1. Determine the operational status of CO sensors;
2. Review the AMS printout to determine any unusual history of sensors’
malfunctions, alert and alarm signals, and abnormal readings; and
3. Determine the means of disconnecting the data line.
Visual and audible alarms on the surface
1. Verify that the AMS signals can be seen or heard by the AMS operator;
2. Determine if the visual and audible alarm signals are distinguishable from
the alert signals; and
3. Observe the operation of the manual reset for automatic warning devices.
Communications
1. Determine if the designated system operator has means of two-way
communication with all working sections.
b. Underground Inspection
Air currents
1. Check the velocity (minimum and maximum) and direction of the air.
Release 1 (February 2013) 3-44