Ametek Thermox TM2000, User Manual

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4-28 | Thermox TM2000 Oxygen Analyzer
The Alarm Key allows you to set control unit alarm information. This
includes the following:

Define whether Alarm 3 activates based on oxygen levels, the start of a
calibration or the start of a verification. (Select Function).

Define for each oxygen alarm (Alarms 3 and 4) whether the alarm
should be a high or low alarm (Alarm Configure). If you selected Hy-
drocarbon Upset under the Sensor Config. option from the Setup Key,
Alarm 4 is fixed as both a high oxygen alarm and as a hydrocarbon
upset condition alarm.

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). Whether these
alarms are set to activate for high or low alarm conditions is defined
using the Alarm Configure menu option.

View exception log data (Exception Log). The exception log provides a
history of events, such as system or error messages, alarm conditions,
and the start of calibrations or verifications.
Overview of Alarm Functions
Figure 4-7 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.

The Select Function menu option applies only to Alarm 3.

The Relay Configure menu option applies to all alarms except for the
watchdog and service alarms, which always de-energize on alarm (fail
safe).