User`s guide

Chapter 4 ______________________________________________________________ Maintenance
VAISALA ______________________________________________________________________ 103
1. Clean the lenses with a lens-cleaning wipe. Be careful not to
scratch the lens surfaces. Lenses should dry up indicating that
the lens heating is functioning.
2. Check that the hoods and lenses are free of condensed water or
ice and snow deposits.
3. Wipe the dust from the inner and outer surfaces of the hoods.
Cleaning DRD Rain Detector
The capacitive rain detector DRD should be cleaned every six months
or more often depending on the conditions.
CAUTION
The measuring principle does not allow for proper ESD protection of
the DRD electronics, carefully follow the instructions below.
1. Ground your hand by touching grounded metallic parts of the
installation to remove excessive static charges from your body.
2. Clean the DRD rain detector carefully with a soft, lint-free cloth
moistened with mild detergent. Be careful not to scratch the
surface.
3. Check that the detector is free of ice and snow deposits.
Storage
Store PWD11A in its transit case in dry conditions, not in the open air.
Storage conditions are:
- Temperature -40 to 70 °C (-40 to 158 °F)
- Relative humidity up to 95 %
Lightning Detector SA20M
There are no customer serviceable components in SA20M. If the
sensor fails, replace it with a known good unit.