Specifications

Halogen Gas Monitor – MultiZone Remote Display
Instruction 3015-5157 34
Alarms
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 HGM-MZ completes a measurement cycle in the affected zone the alarm condition will
be indicated. At that time the red ALARM LED on the HGM-MZ will glow. Additionally, an external alarm
device may activate and an audible alarm may sound if those features have been enabled (Pages 21 & 25).
The next time the HGM-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
(Pages 21 & 25).
The alarm condition may or may not have to be acknowledged for the system to return to normal operation.
Responding to Alarms
There are two screens from which an operator can respond to alarms:
 From the System Screen (Page 18) select the ALARMS field to go to the Alarm Summary Screen.
 From the top level Zone Screen (Page 30) select the ALARMS field at the bottom of the display
screen to go to the Alarm Summary Screen.
Alarm Summary Screen
ALARMS
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.