Vaisala PWD22 - Cleaning RAINCAP; Calibration; Visibility Calibration

Chapter 6 ______________________________________________________________ Maintenance
VAISALA _______________________________________________________________________ 83
CHAPTER 6
MAINTENANCE
This chapter provides information needed in basic maintenance of the
product.
Periodic Maintenance
PWD22/52 is calibrated at the factory and no initial calibration is
required.
Periodic maintenance of PWD22/52 includes:
- Cleaning the transmitter and receiver lenses and hoods.
- Cleaning the RAINCAP
®
Rain Detector.
- Checking the visibility calibration and calibrating it, if necessary.
- Cleaning PWL111 lenses.
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, open the
communication line by typing the following:
OPEN
PWD22/52 answers as follows:
LINE OPENED FOR THE OPERATOR
To release the line to automatic messages, use the CLOSE command. For
details, see Chapter 5, Operation on page 49.