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April 2004
9-38 Servicing the PT878GC
Testing the Watchdog Timer Circuit
The PT878GC includes a watchdog timer circuit. If a software
error causes the meter to stop responding, this circuit
automatically resets the meter. A properly functioning PT878GC
restarts if you run the Watchdog Test.
To start the Watchdog Test, scroll to the Watchdog Test option in
the Test Menu and press
[ENTER]. The screen appears similar to
Figure 9-23 below.
Figure 9-23: The Watchdog Test Screen
Press
[F2] (No) to cancel the test and return to the Menu screen,
or press
[F3] (Yes) to start the test. The PT878GC should go
blank for a few seconds, and then restart. If it does not follow this
sequence, consult GE Panametrics.
Dew Point, °C
Signal, dB
-52.0
32
Pressure, PSIg
55.00
10.0
Run Time, Hours
Site Program Meter Logging Service
Units
Reports
Reference
MIS Probe
Factory Defaults
Flash Update
06
12
Factory Calibration
Test
X
No
Watchdog Test
Test Sc reen
Test Keys
Yes
** WARNING **
This test should automatically
restart your meter!
Press ‘Yes’ to start the test.
Press ‘No’ to cancel the test.
Watchdog Test