VEGA VEGAPULS SR 68 Foundation Fieldbus - Manual (Page 15)

15
4 Mounting
VEGAPULS SR 68 • Foundation Fieldbus
38297-EN-130624
3. Insert the antenna from below into the vessel socket and secure it
against falling off
4. Retighten the antenna with hexagon screws to the antenna
socket; torque max. 2.5 Nm (1.8 lbf ft)
Note:
The radar sensor with rinsing air connection or antenna extension
is provided with a notch on the antenna socket. This notch must be
aligned with the marking on the process fitting (the marking specifies
the position of the polarisation of the radar signal).
3
4
1
2
Fig. 5: Dismounting of the horn antenna
1 Marking for the polarisation
2 Marking at the antenna socket
3 Hexagon screws on the antenna socket
4 Antenna
4.3 Mounting preparations - Parabolic antenna
The instrument is also available in versions where the antenna has
a diameter larger than the process fitting (thread, flange). With such
versions the antenna must be disconnected from the process fitting
before mounting. Proceed as follows:
1. Clamp VEGAPULS SR 68 with the flange, e.g. in a bench vice
2. Hold the connection piece (3) with a wrench on the flat surfaces
(width across flats 22 mm)
3. Loosen counter nut (2) completely with a wrench (width across
flats 36 mm) in the direction of the antenna
4. Loosen compression nut (1) completely with a wrench (width
across flats 41 mm) in the direction of the antenna
5. Remove the parabolic antenna (4) axially
6. Mount sensor flange on the adapter flange and fasten it tightly
7. Check if the O-ring seal is present on the connection piece and
make sure it is not damaged.