Controller / User Interface | 4-29
Alarm Set Points
This menu option allows you to set your alarm limits. Whether these
limits represent high or low alarms is defined using the Alarm Configure
menu option, although certain restrictions apply (see the “Alarm Config-
ure” section. Also, if you select Hydrocarbon Upset as the Sensor Config.
option from the Setup Key menu, Alarm 4 is fixed as both a high alarm
and the alarm that triggers during a hydrocarbon upset condition.
If an alarm triggers, an up or down arrow will appear to the right of the
process reading on the display (depending on whether it is a high or low
alarm). For example, if the first display line is showing % O
2
values, and
a high alarm occurs, an up arrow will appear to the right of the O
2
value.
If, for example, you set Alarm 3 for a high O
2
alarm and Alarm 4 for a
high O
2
alarm, and the O
2
value exceeds both the Alarm 3 and Alarm 4 set
points, two up arrows will appear next to the O
2
value on the display.
Figure 4-7.
Alarm Key overview.
ALARM NUMBER
FUNCTION
*Select Function Alarm Congure Relay Congure
Alarm 3
% O
2
Cal Start
Verify Start
High O
2
Alarm
Low O
2
Alarm
(Only selectable if
Select Function is
oxygen)
(Disabled during
calibration cycle and
during system alarm
condition)
Energize on alarm
De-energize on alarm
Alarm 4 O
2
Hydrocarbon Upset
(Selectable through
Setup/Sensor Con-
g. menu option)
High O
2
Alarm
Low O
2
Alarm
(Disabled during
calibration cycle and
during system alarm
condition)
* Note: Alarms 1 and 2 are reserved for the watchdog timer and service alarms and are
not software-selectable.
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