Vaisala AWS330 - Manual (Page 188)

User's Guide ______________________________________________________________________
186 _________________________________________________________________ M211296EN-B
Mechanical Wind Sensor Set WA15
Maintenance
Periodic Maintenance
Replace the bearings yearly and check that the printed circuit board is not
corroded. Check operation whenever you tilt the mast.
Cleaning
Heavy contamination in the vane, such as bird droplets or ice, will
deteriorate the accuracy of the wind vane. Clean the vane when
necessary.
Testing Proper Operation
The sensor will hold its accuracy in all conditions for 1 year. If the rains
are mostly moderate and the atmospheric conditions on the site are not
particularly corrosive, the sensor accuracy will remain for 2 years.
However, the ball bearings must be checked once a year. To do this,
remove the vane or cup-wheel assembly. To ensure proper operation, the
shaft should spin smoothly without creating any detectable noise.
Replacing Bearings of WAV151
Replacement of the bearings should only be done by a trained technician.
To replace the ball bearings, follow the procedure below and refer to
Figure 112 on page 189 or send the wind set to Vaisala for maintenance.
1. Loosen the vane assembly fixing screw with an Allen key 2 mm.
The correct screw is the lower one shown in Figure 112 on page
189. Remove the assembly.
CAUTION The vane assembly fixing screw has been treated with sealant. Do not
remove the fixing screw to ensure perfect sealing.
2. Loosen the hex nut of the connector with a 27-mm tool.
CAUTION Be careful not to bend the connector pins.