User`s guide

Chapter 5 ___________________________________________________________ Troubleshooting
VAISALA ______________________________________________________________________ 113
- Tree branches, loose cables, or any other moving objects in
the sample volume may cause sudden changes in the scatter
signal.
4. Check the power supply voltage and cable connections.
5. Check that all the connectors are properly inserted.
6. Check that there are no flashing lights close to PWD11A.
- Flashing lights may cause PWD11A to detect peaks in the
optical signal.
SA20M
Table 38 Troubleshooting SA20M
Problem Probable Cause Remedy
Bad connection. Check that all cables
are properly connected
to SA20M.
Cable failure. Check cable integrity.
No power. Restore power to
SA20M.
No data transfer from
SA20M
Poor siting of SA20M.
Too close to obstruction
(such as metal fences)
that is causing signal
degradation.
Remove any
obstructions.
SA20M appears to be
reporting lightning data
in the opposite direction
of the expected location
(180 degrees off).
The sensor is not
properly grounded.
Check the grounding
connection wire.