Ametek Dycor CG1000-RTP, User Manual

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4-18 | Dycor CG1000-RTP Oxygen Analyzer
Watchdog Relay
During normal system operation, the watchdog relay operates as
normally closed (system failure causes open contacts).
The watchdog alarm relay de-energizes when the system watchdog timer
times out. The watchdog timer will time out and cause the control unit to
reset itself to prevent the control unit from becoming “lost” due to such
things as noise spikes or power surges. You can use this relay to activate a
remote indicator to notify you if the watchdog timer times out.
In addition, the control unit reads the watchdog after reset, and beeps for
a brief time if the reset was caused by a watchdog condition. Pressing the
reset keys simultaneously (hidden keys to the left and right of the Setup
key) for a long enough time will, in turn, cause a watchdog, which will
indicate as a beep after the system restarts upon release of the reset keys.
Exception Log
The exception log provides a history of the following types of events:
•
System or error messages
•
Alarm conditions
•
Reset conditions
•
Start of calibrations or verifications
Accessing the Exception Log
•
Choose Exception Log from the Alarm menu.
The system shows you the most recent exception log entry on Display
Line 4, and shows when this event was recorded on Display Line 3.
Display Line 3 also shows the order in which events are recorded into
the log, with number 1 indicating the most recent entry into the log. The
system is able to store the 20 most recent entries in this exception log.
Pressing the Down Arrow Key shows later exception log entries. Pressing
the Up Arrow Key shows more recent exception log entries. Press Cancel
at any time to exit this menu option.
NOTE
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