User`s guide

User’s Guide ______________________________________________________________________
162 __________________________________________________________________M210662EN-A
needed, because the sensor has been calibrated at the factory. Periodic
maintenance of the Present Weather Detector includes:
- Cleaning of the transmitter and receiver lenses and hoods
- Cleaning of the DRD Rain Detector.
0410-190
Figure 116 DRD on Present Weather Detector
Cleaning Lenses and Hoods
The lenses of the transmitter and receiver units should be relatively
clean to get reliable results. With dirty lenses, the given visibility values
are not reliable. Cleaning should be done every six months or more
often depending on the conditions (for example, if there are roads
nearby).
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.
NOTE
Some erroneous data may be generated due to cleaning the sensor.