Specifications

Ammonia Gas Monitor – Multi Zone
54 Instruction 3015-5113
register. This will cause the alarm to be “silenced” in the AGM-MZ (i.e., the alarm relays will return to
their normal state and the ALARM lamp will be extinguished). The next time the zone with the alarm
condition is sampled, if the alarm condition still exists, the alarm will be reactivated and the alarm
parameter will be reset to “1” in the AGM-MZ. Otherwise, if the alarm condition has cleared, no further
action is required and normal operation will resume.
3. Latching Mode without Silence. This mode is enabled by setting the AUTO_ACK_MODE in the
system register to “0”. In this mode, if an alarm condition occurs, an AGM-MZ alarm will be created.
The AGM-MZ MODBUS master will then write a “1” to the ALARM ACK parameter in the zone register.
The alarm will continue to persists (i.e., Relays in alarm state and Alarm light on) until the offending
zone is sampled and no alarm condition is detected. At that point, the ALARM ACK parameter is
automatically cleared by the AGM-MZ, as is the ALARM parameter. NOTE: If the ALARM ACK
parameter is set to “1” and the ALARM CONDITION is upgraded (from leak to spill, or spill to evacuate)
the ALARM ACK parameter will automatically be cleared to “0” by the AGM-MZ.