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Select
Function
O
2
Cal Start
Alarm 3
Verify Start
O
Alarm 4
2
4-20 | Thermox CG1000 Oxygen Analyzer
Overview of Alarm Functions
•
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.
• Alarm 4 is always an oxygen alarm.
•
The Relay Configure menu option applies to all alarms except for the watch-
dog and service alarms, which always de-energize on alarm (fail safe).
High O
alarm
2
Low O
alarm
2
High Flow
Low Flow
(not selectable if Select Function is in calibrate or verify)
only
High O
alarm
2
Low O
alarm
2
Alarm Set Points
Set alarm limits. Define whether these limits represent high or low alarms
using the Alarm Configure menu option. Certain restrictions may apply (see
the Alarm Configure section).
If an alarm triggers, an up or down arrow will appear to the right of the
process reading on the display. For example, if the first display line is
showing % O
values, and a high alarm occurs, an up arrow will appear
2
to the right of the O
value. If, for example, you set Alarm 3 for a high O
2
alarm and Alarm 4 for a high O
Alarm 3 and Alarm 4 set points, two up arrows will appear next to the O
value on the display.
Defining alarm set points
1. From the Alarm menu, select Alarm Set Points.
Once you select the Alarm Set Points menu option, the system alerts
you that Alarms 1 and 2 are reserved for the watchdog and service
alarms, and are not software selectable. Press Enter to continue to the
NOTE
configurable alarms.
Function
Alarm Configure
alarm, and the O
2
Relay Configure
Energize on alarm
De-energize on
alarm
value exceeds both the
2
2
2
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