Reassembling The Wind Vane - Vaisala WAV151 User Manual

4.4 Reassembling the Wind Vane
1. Attach the top bearing.
2. Attach the shaft through the upper body.
3. Attach the lower bearing.
4. Attach the internal retaining ring at the bottom of the shaft.
5. Attach the spacer ring.
6. Attach the external retaining ring.
Be careful when handling the new ball bearings. Do not drop them or force
them onto the shaft.
7. Attach the code disc back onto the shaft and tighten the fixing screw of the code disc.
CAUTION!
on the printed circuit board.
8. Attach the heating element outlet to the printed circuit board. Put the printed circuit
board in place and fasten it with spacers.
9. Put the lower body assembly carefully into place.
Make sure that the bigger O-ring positioned between the upper and the lower sensor
bodies is in place and fasten the three screws at the bottom of the sensor.
Vaisala recommends replacing the O-rings with new ones before
reassembling.
10. Tighten the hexagon nut of the connector.
11. Connect the cable plug to the sensor body connector and fasten the sensor body on the
cross arm with three screws.
12. Mount the vane assembly onto the sensor body. Tighten the screw.
CAUTION!
tools. To avoid any damages, Vaisala recommends that the manufacturer
replaces the heating element.
The wind vane is counter-balanced at the factory but you can readjust it, if necessary. To
do this, loosen the vane assembly and place it on its side on the table. A correctly
balanced vane stays in horizontal position.
Make sure that the code disc does not touch the opto-coupler
Replacing the heating resistance element requires special
Chapter 4 – Maintenance
15