Chapter 6 Maintenance; Periodic Maintenance - Vaisala PWD22 User Manual

Chapter 6_______________________________________________________________ Maintenance
CHAPTER 6
MAINTENANCE

Periodic Maintenance

VAISALA ________________________________________________________________________ 89
This chapter provides information that is needed in basic maintenance
of the product.
PWD22 has been calibrated at the factory. Thus, no initial calibration
is required.
Periodic maintenance of PWD22 includes the following:
- Cleaning the transmitter and receiver lenses and hoods.
- Cleaning the RAINCAP
- Checking the visibility calibration and calibrating it, if
necessary.
PWD22 is designed to operate continuously for several years without
other maintenance than cleaning of the lenses and the RAINCAP
sensing surface.
PWD22 is designed to operate continuously for several years without
other maintenance than cleaning of the lenses.
Section Removing and Replacing on page 90 describes in detail how
to remove and replace Transmitter PWT11 and Controller/Receiver
PWC22 units. Removing the units comes into question, when there is
reason to suspect that malfunction of PWD22 is caused by faults in
these units.
Before any commands can be given to PWD22, the communication
line has to be opened.
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Rain Detector.
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