Ametek Thermox 2000 ATEX Series User Manual page 94

4-26 | Thermox Series 2000 WDG-HPII / HPIIC - ATEX
Define for each oxygen alarm (Alarms 3 and 4) whether the alarm
should be a high or low alarm (Alarm Configure). If you have the
combustibles option, the combustibles alarms (Alarms 5 and 6) always
act as high alarms, and can't be configured as low alarms.
Define whether alarm relays should energize or de-energize on alarm
(Relay Configure). The selection you make using the Relay Configure
menu option applies to all alarms except the watchdog and service
alarms, which always de-energize on alarm.
Define alarm set point values (Alarm Set Points). For oxygen alarms,
these values depend on the Alarm Configure menu option for
whether they are high or low alarms.
View exception log data (Exception Log). The exception log provides
a history of events, such as system or error messages, alarm condi-
tions, and the start of calibrations or verifications.
Overview of Alarm Functions
Figure 4-8 provides an overview of how alarms can be set:
Alarms 1 and 2 are reserved for the watchdog alarm (Alarm 1) and
the service alarm (Alarm 2). These alarms are not software selectable.
Different alarms are limited in terms of what functions they can
perform (see Figure 4-7). For example, combustibles alarms (Alarms 5
and 6) can only be used for combustibles. These alarms are only
available if you have the combustibles card installed in your Series
2000 control unit and the appropriate sensors.
The Select Function menu option applies only to Alarm 3. All other
alarms are restricted to activate based on process reading levels.
The combustible alarms (5 and 6) can only be high alarms.
The Relay Configure menu option applies to all alarms except for the
watchdog and service alarms, which always de-energizes on alarm
(fail safe).