804-R010-330 datasheet(10/32 Pages) MAGNETROL

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50-604 Kotron Model 804 Sentinel II RF Level Transmitter

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.

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