Page 48 • MNF18001EN / DOK-479-E ║ Issue/Rev. 1.4 (9/18)
The wet leg sensor interface evaluates the fill level of the tank truck
compartments via wet leg sensors (part no.
NS-2E
) installed in the pipe
system of each individual tank truck compartment.
The compartment state can either be empty or not empty/filled.
Short-circuits and interruptions such as the detachment of the plug-in
connectors can be detected. The states of the wet leg sensors or the
changes of their states are transmitted via the internal CAN bus to the
MultiLevel main unit for further processing and relayed from there to
the NoMix.
Apart from the wet leg sensors, there are two intrinsically safe inputs in
the wet leg sensor interface for the evaluation, for example, of a main
pneumatic switch.
Via the pneumatic switch, the system detects whether the supply of the
pneumatic system with compressed air is ensured. This information is
also transmitted to the MultiLevel main unit via the internal CAN bus
and relayed to the NoMix.
7.3.
Wet leg sensor – NS-2E
Parts no.:
NS-2F
Drawing: 51.351307
Wiring diagram: 51.351346
Figure 36:
Wet Leg Sensor – NS-2F
The wet leg sensors (part nos.
NS-2F
) are to be installed with the aid of
the welded nozzles at the lowest points of the piping that are still part of the
respective compartments.
This lowest point is located on the underside of the pipe in front of the flange
of the line valve (as seen from the foot valve) or in the loading coupling.
The wet leg sensors must always be installed vertically from below.
The wet leg sensors are electrically connected with the terminals of the wet leg
sensor interface.
If necessary, the detection level of the
NS-2F
wet leg sensors can be adjusted
with the aid of different intermediate bushes. To increase the detection level,
the bush has to be shortened with a lathe, or it can be left out completely.
For tank trucks with double-sided discharge and two wet leg sensors per
compartment there is one of the sensor in the API coupling. The second in front
of the outlet connection at the lowest point of the pipe on the opposite side.
MultiLevel Instruction Manual
Modules
Summary of Contents for Sening MultiLevel
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