50-604 Kotron Model 804 Sentinel II RF Level Transmitter
7
2.2.5 Remote Mount with Flexible Probe
2.2.5.1 Main amplifier
Remote amplifier assemblies are normally shipped from
the factory assembled into an “L” mounting bracket. To
install amplifier assembly, proceed as follows. Refer to
Figure 5.
1. Remove amplifier from mounting bracket.
2. Install bracket in a location that is isolated from tempera-
tures below -40° F (-40° C) and above +160° F (+70° C)
and vibration which could cause mechanical damage.
The unit may be mounted up to 2500 feet (760 m) from
the probe assembly. Location should also offer easy access
for wiring, calibration, and maintenance.
3. Re-install amplifier onto mounting bracket.
4. Remove the electronics assembly from the housing by
loosening the four mounting screws.
5. Route the twisted shielded pair cable up through the
housing base as shown in Figure 5 on page 6.
6. Remove the shield from the electronics assembly by
removing the top mounting screw and snapping the shield
off of the bracket.
7. Attach the twisted pair to the daughter board (refer to
Figure 5) as follows:
«
Red wire to the + (positive) screw terminal;
«
Black wire to the – (negative) terminal;
«
Shield to the shield terminal.
8. Dress wires and reassemble shield to the bracket. Reinstall
the electronics assembly into the housing base.
9. Replace the housing cover and proceed with the wiring of
the preamplifier.
2.2.5.2 Preamplifier
Caution:
Flexible probes are shipped with the cable clamp and the
probe nut hand-tightened. The end of a flexible probe
must be secured to the bottom of the tank by either
attachment to a bracket or to a heavy weight in order to
keep the probe taut. Follow the mounting instructions
below.
1. Remove mylar housing insulator located over the clamp.
Refer to Figure 3 on page 4.
Caution:
Do not discard the mylar housing insulator.
