Valmet Valmet MCA, Инструкция по установке и эксплуатации, Страница: 48 / 66

11.3. Antenna Cables, FT Sensor
NOTE: Before removing the sensor, check that the pro-
cess pipe is unpressurized and empty and that it is safe
to remove the sensor.
Removal
1. Remove sensor electronics according to the instruc-
tions in section 11.1.
2. Open the inlet bushing of the antenna cable con-
nected to the base plate. Slide it down until the
connector body at the end of the cable becomes
visible.
3. Hold the connector body in place with an 8 mm
wrench (e.g. SMA wrench) while you use a 10 mm
box wrench to open the lock bushing that is at-
tached to the connector on the other side of the
base plate.
NOTE: Don't allow the connector body to rotate while
you turn the lock bushing.
4. Loosen the four mounting screws of the sensor
cover and lift the cover off.
5. Loosen the antenna cable's SMA connector from
the antenna end with an SMA wrench or SMA
wrench adapter. In sensor model FT 100, you must
also loosen two cable feed-through mounting
screws.
6. Lift the antenna cable out of its mounting groove
by, for example, prying the casing tube with a
screwdriver such that the cable begins to come
out of the groove starting with the antenna end.
7. When the cable's casing is separated from the
sensor body, pull the cable connector on the base
plate carefully out of its hole.
NOTE: Lift the cable by its casing tube, not by the cable
itself.
NOTE: Be careful not to dent the antenna cable connector
on the base plate.
Installation:
1. Check that the nylon sealing ring is in place in the
base plate at the bottom of the antenna cable
feedthrough thread.
2. Place the antenna cable connector gently into the
hole in the base plate and press the antenna cable
casing into its mounting groove. Check that the
antenna end feed-through collar fits into place.
3. Take hold of the antenna cable connector on the
base plate with an 8 mm set wrench. From the
other side of the base plate, screw on the antenna
cable lock bushing with a 10 mm box key attached
to the Beltzer Torque driver to 1 Nm torque. Do
not use force in tightening the lock bushing; too
much force will damage the connector.
4. Slide the antenna cable's through the inlet bushing
down to the base plate and screw it into place.
5. Screw the antenna cable connector on the antenna
into the antenna connector with an SMA wrench
or or with the SMA Torque Wrench Adapter at-
tached into a SMA wrench to the torque indicated
by the wrench. In sensor model FT-50/FT-100,
you must also screw in two feed-through mounting
screws.
6. Attach the antenna's cover with its four mounting
screws.
Installation & Owner’s manual OUL00298 V2.3 EN 48 Valmet Mircowave Consistency Transmitter