User`s guide

Chapter 4 ______________________________________________________________ Maintenance
VAISALA______________________________________________________________________ 139
the lower sensor bodies. The O-ring is recommended to be replaced
with a new one after each opening. Check also that the connector's
O-ring (14) is properly in its place.
5. Tighten the hexagon nut of the connector (2).
6. Connect the cable plug to the sensor body connector. Fasten the
sensor body on the crossarm with three screws.
7. Mount the cup assembly onto the sensor body. Tighten the fixing
screw.
NOTE
When placing the lower body assembly, make sure that the O-ring is
correctly positioned between the upper and lower bodies. It is
recommended to replace the O-rings with a new ones before
reassembling.
The following numbers refer to Figure 110 on page 140:
1 = Cup wheel assembly
2 = Hex nut of the connector
3 = M6x16 DIN7991 (3 pcs)
4 = Lower body
5 = Spacer (3 pcs)
6 = Printed circuit board (PCB)
7 = Chopper disc
8 = External retaining ring, body
9 = Spacer ring
10 = Internal retaining ring, shaft
11 = Ball bearings
12 = Shaft and Upper body assembly
13 = Ball bearings
14 = O-rings, 2 pcs
CAUTION
The heating resistance element cannot be removed without special
tools. To avoid any damages, it is recommended that replacement of
the heating element be carried out by the manufacturer.