7
3 Mounting
VEGAPULS 68 • 4 … 20 mA/HART - four-wire
51905-EN-180222
3 Mounting
3.1 Mounting preparations - Horn antenna
VEGAPULS 68 is also available in versions where the antenna has a
bigger diameter than the process fitting (thread, flange). The antenna
must therefore be disconnected from the process fitting before mount-
ing. Proceed as follows:
1. Loosen the hexagon socket screws (3) on the antenna socket
with an Allen wrench (size 3)
2. Remove the antenna (4)
Note:
The plastic cone may not be pulled out of the antenna socket.
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. 10 Nm (7.5 lbf ft)
Note:
The VEGAPULS 68 with rinsing air connection or antenna exten-
sion is provided with a notch on the antenna socket. This notch must
correspond to the marking on the hexagon of the process fitting (the
marking specifies the position of the polarisation of the radar signal).
4
3
5
1
2
Fig. 1: Dismounting of the horn antenna
1 Marking
2 Notch
3 Hexagon screws on the antenna socket
4 Antenna
3.2 Mounting preparations - Parabolic antenna
VEGAPULS 68 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:
