Chapter 6 Maintenance; Periodic Maintenance - Vaisala PWD22/52 User Manual

Chapter 6 ______________________________________________________________ Maintenance
CHAPTER 6
MAINTENANCE

Periodic Maintenance

VAISALA _______________________________________________________________________ 81
This chapter provides information that is needed in basic maintenance of
the product.
PWD22/52 has been calibrated at the factory. Thus, no initial calibration
is required.
Periodic maintenance of PWD22/52 includes the following:
- Cleaning the transmitter and receiver lenses and hoods.
- Cleaning the RAINCAP
- Checking the visibility calibration and calibrating it, if necessary.
PWD22/52 is designed to operate continuously for several years without
other maintenance than cleaning of the lenses and the RAINCAP
sensing surface.
Before any commands can be given to PWD22/52, the communication
line has to be opened.
Open the communication line by typing the following:
OPEN
PWD22/52 answers as follows:
LINE OPENED FOR THE OPERATOR
The line can be released to automatic messages using the CLOSE
command. For details, see Chapter 5, Operation on page 47.
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Rain Detector.
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