August 2003
8-8
Servicing the PM880
Testing the Watchdog Timer Circuit
The PM880 includes a watchdog timer circuit. If a software error
causes the meter to stop responding, this circuit automatically
resets the meter. A properly functioning PM880 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 8-7 below.
Figure 8-7: 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 PM880 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
0
6
12
Factory Calibration
Test
X
No
Watchdog Test
Test Screen
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
Содержание PM880
Страница 1: ...PM880 Portable Hygrometer ...
Страница 38: ...August 2003 2 18 Initial Setup Keypad cont Figure 2 8 The PM880 Keypad ...
Страница 150: ...August 2003 8 4 Servicing the PM880 Printing Reports cont Figure 8 3 Printout of a Typical Drive Report ...
Страница 237: ...5 August 2003 Index cont K K PPMv 3 17 Keypad Description 2 17 Key Description 2 17 Keys Description 2 17 ...