In Counting Room A there are two alarm panels associated with the gas systems for the detectors. They are located on the far left end of the control console, mounted one above the other. The upper panel is a Gas Master flammable gas monitoring system. The lower panel is a gas systems status indicator. The Gas Master system will go into alarm if elevated levels of flammable gas are present in either of the Detector Shielding Huts or the Gas Shed. The Gas Master system will also go into alarm if the magnets vent cryogens. The gas systems status will alarm if any of a number of faults are detected in the Hall A Wire-chamber Gas System. The led for the specific fault will turn red to indicate which fault caused the alarm.
Response to an alarm should be to contact either of the personnel listed above.