Figure 13: Pulling the tab.
Alarm and Relay Thresholds
Alarm thresholds, relay programming, the management of time delays, and
methods of release are controlled over the COM 43 application.
Note: It is possible to modify an alarm limit via the Programming menu of MX
43.
Parameters of Detector alarms
It is possible to program the following for each detector:
■ 3 alarm thresholds.
■ Each value is configurable in increasing or decreasing values.
■ Each alarm is configurable as an instantaneous and/or average alarm of
15 to 480 minutes.
■ Each alarm has an adjustable lag of 0 to +3% (or -3% for a negative alarm)
for the value of the range of measurement, by pitch steps of 1%.
■ A high-range excess alarm (OVS: over scale).
■ A UDS low-range excess alarm (UDS: underscale).
■ A “clear doubt” alarm (in the case of explosive gas detectors).
The alarms may be programmed for automatic or manual release (except
OVS, UDS, and clear doubt).
Automatic deletion of alarms
The release (resetting) of alarms does not require any intervention. The
management of alarms (relays, indicators, buzzer) is carried out according to
the following table:
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