Testing The Watchdog Timer Circuit - GE TransPort PT878GC User Manual

April 2009

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
Figure 9-23 below.
Site Program Meter Logging
Dew Point, °C
** WARNING **
Units
This test should automatically
restart your meter!
Press 'Yes' to start the test.
Pressure, PSIg
Press 'No' to cancel the test.
Figure 9-23: The Watchdog Test Screen
[F2]
Press (No) to cancel the test and return to the Menu screen, or
[F3]
press (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 Sensing.
9-38
[ENTER]
. The screen appears similar to
Watchdog Test
-52.0
55.00
No
Service
Signal, dB
Reports
Test
32
Reference
Test Screen
MIS Probe Test Keys
Factory Defaults
Watchdog Test
Flash Update
Factory Calibration
Run Time, Hours
10.0
0 6
Yes
Servicing the PT878GC
12