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PROPRIETARY AND CONFIDENTIAL DRAFT 28/Feb/03

Theory of Operation
Chapter 3: Theory of Operation

During an alarm condition or a system error on the Master Alarm, the
following occurs:

• Master Alarm sounds an alarm, and the corresponding red alarm LED
lights, if applicable (errors do not light LEDs).

• Message displays.
• Alarm or error logs into the Master Alarm’s memory.

• Electronic message is sent.
• If the Network Communications Board is installed in the Area Alarm, and
the Area Alarm Modules fail to respond to the Master Alarm; the Master
Alarm sounds, message is sent to the event log and displayed, and an
electronic message is sent.
3
During an alarm condition or a system error on the Area Alarm, the following
occurs:
• Area Alarm sounds an alarm, and the corresponding red high or low alarm
LED lights, if applicable (errors do not light LEDs).
• If the gas pressure is above or below its setpoints or if the vacuum is below
its setpoint, the pressure reading flashes.
• If it is an alarm error, the error code displays on the corresponding Area
Alarm Module.

• If the Network Communications Board is installed in the Area Alarm:
• Area Alarm message is sent to the Master Alarm.

• Master Alarm sounds.
• Message displays on the Master Alarm.

• Error or alarm logs into the Master Alarm’s event log.
• Electronic message is sent from the Master Alarm.

All alarms include the following:

• Alarm silence key to silence the audible alarm.

• Red LEDs that remain lit until the alarm condition is no longer present.
• Test key to perform a self-test of each alarm.

MedPlus TotalAlert™ Alarm Network Operation and Maintenance Manual (man291ra) Page 3 - 5