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44 Instruction 3015-4275
General Operation
Functional Overview
Normally each AGM300 will sequentially perform measurements on its active zones without user input. The
total time it takes an AGM300 to complete a measurement cycle is directly proportional to the number of active
zones and the physical length of the sample-gas lines. Monitors linked together on a network operate
independently of each other and consequently complete their respective measurement cycles at different rates.
The ADM800 operates by polling the network approximately once every 12 seconds to determine the current
status of each AGM300 monitor. If more than one AGM300 is connected to the network, it will sequentially poll
each monitor for its status. As a practical matter this simply means that the more complicated the network, the
longer it will take the ADM800 to update the status information for all zones.
To display all the zones being monitored, go to the System Screen (page
31) and press the ZONES key.
Working with the Zone Screen
The top level Zone Screen provides a summary view of zone activity across the network. Each screen displays
information from a single AGM300 monitor as indicated at the top of the display. Each screen can display
information for up to 8 zones, and depending on the configuration of the system, there can be up to two screens
for each AGM300. Use the UP/DOWN cursor keys or the NEXT key to scroll the screen display.
Each box displays the zone location and the last PPM measurement. A blinking box indicates that a
measurement is currently being taken in that location. An inverse flashing box indicates an alarm condition in
that zone.
Use the LEFT/RIGHT cursor keys to scroll through the zones.
Zone Screen
To further investigate the status of any zone, press the adjacent key to go to the Zone Setup #1 Screen
(Page
41). You may also press the SYSTEM key to go to the System Screen (Page 31).