11.3. Antenna cables, FT-sensor
Removing (Fig. 3 & 4)
1. Remove the sensor electronics as instructed in
section 11.1 above.
2. Unscrew the antenna cable inlet bushing from the
sensor base plate, and slide it down until the con-
nector body at the end of the cable can be seen.
3. Hold the connector body in place with an 8mm
wrench (e.g. SMA wrench) and at the same time
use a 10mm box wrench to loosen the lock bushing
on the other side of the base plate.
NOTE: Make sure that the connector body does not turn
while you unscrew the lock bushing!
4. Open the four screws fastening the antenna cover
in place, and remove the antenna cover.
5. Open the antenna cable SMA connector from the
antenna end, use either an SMA wrench or an
SMA adapter. With FT50/FT80/FT100, you also
need to open two screws that fasten the cable
bushing.
6. Remove the antenna cable from its mounting
groove, for example by prying off the casing tube
with a screwdriver so that the cable comes out of
the groove at the antenna end.
7. When the cable casing tube is loose from the
sensor body, carefully pull the connector on the
base plate out from its hole.
NOTE: Lift the cable holding by its casing tube, not by
the cable itself!
NOTE: Be careful not to damage the antenna cable con-
nector on the base plate!
Installing
1. Make sure that the PTFE (Teflon) seal ring is in
place, on the bottom of the antenna cable lead-
through thread on the base plate.
2. Carefully insert the antenna cable connector to the
hole on the base plate, and press the antenna
cable casing tube into the grooves. Make sure that
the rubber collar at the antenna end fits into its
correct place.
3. Using an 8mm wrench, hold the antenna cable
connector on the base plate in position. On the
other side of the base plate, tighten the connector
lock bushing to 1 Nm torque using a box key at-
tached to a Beltzer torque driver. Do not over-
tighten the lock bushing, you may break it!
4. Slide the antenna cable inlet bushing down to the
base plate and screw it into the thread.
5. Using either an SMA wrench or an SMA adapter,
screw the antenna cable connector into the an-
tenna connector, to the torque indicated on the
wrench. For FT50/FT80/FT100: also screw in the
two mounting screws of the bushing.
6. Fasten the antenna cover with the four mounting
screws.
Fig. 3. Detaching the antenna cable, FT100.
Fig. 4. Detaching the antenna cable, other FT sensor
models.
Installation & Owner's manual, OUL00489 V2.3 EN
39
Valmet Total Solids Transmitter
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