MZ-RD – Multi-Zone Remote Display
Instruction 3015-5157 25
4.6. Alarms
4.6.1. Functional Overview
If the ppm level for any zone exceed its designated spill, leak, or evacuate thresholds, an alarm
condition will be created. Once the gas monitor completes a measurement cycle in the affected
zone the alarm condition will be indicated. At that time the red ALARM LED on the gas monitor
will glow. Additionally, an external alarm device may activate and an audible alarm may sound if
those features
have been enabled.
The next time the MZ-RD polls the affected monitor, its red ALARM LED will glow. Additionally,
an external alarm device may activate and an audible alarm may sound if those features have
been enabled.
The alarm condition may or may not have to be acknowledged for the system to return to normal
operation.
4.6.2. Responding to Alarms
There are two screens from which an operator can respond to alarms:
From the System Screen, select the ALARMS field to go to the Alarm Summary Screen.
From the top level Zone Screen select the ALARMS field at the bottom of the display
screen to go to the Alarm Summary Screen.
Alarm Summary Screen
The Alarm Summary Screen displays a list of all alarm conditions pending across the network.
The screen is divided into 8 boxes, and each box represents a single alarm. If more than 8
alarms are pending additional pages can be displayed by pressing the MORE key.
Each box displays the zone number, zone name, and the current ppm reading. A flashing box
indicates an alarm that has not been acknowledged. A static box represents an alarm that has
been acknowledged but has not yet been cleared from the system.
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