TM 55-1930-209-14&P-11
CHAPTER 2 DESCRIPTION OF OPERATION
2-1 General. Sensors and switches monitor operating conditions of various Items of equipment onboard, such as
amount of drinking water In storage tanks, temperature of diesel engine cooling water, etc. This data is sent to main
processor, which displays it on one of eight display pages on video monitor. The system In normal operation
continuously displays each display page for approximately 9 seconds and then automatically moves on to a new page. A
display page Is either a to indicate a varying quantity (e. g. , amount of drinking water) or a lighted block to indicate that
an item Is being monitored and Is operating normally. In an alternate mode, the operator selects a specific display page
to observe by pressing the appropriate keyboard button. When a sensor detects a value that exceeds acceptable
operating conditions, main processor starts flashing that particular display at double intensity It also activates remote
alarms (horns, strobe lights and buzzer) alerting crewmembers that corrective action Is required. When the crew
acknowledges the situation, alarms stop and displays on video monitor stop flashing They continue to be displayed at
double intensity until condition that caused the alarm Is corrected.
2-2 Power supply. Two rechargeable 1 2-volt gel cell batteries connected in series provide a 24 Vdc supply for the
EMS. A battery charger keeps these batteries fully charged The 24 Vdc power panel provides power for horns, strobe
lights and buzzer When an abnormal condition exists, main processor energizes a relay that connects this power source
to these alarms
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