Kobold NMC, Руководство по эксплуатации

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NMC
Page 4 DT0305
5. Application
The probe of the NMC and the wall of the tank, forms an electric capacitor. The
dielectric of this capacitor when the tanks is empty, is the air.
When the liquid reaches the probe, the dielectric constant formed by the unit and
tank, changes.
An electronic circuit sited in the connecting module of NMC, converts this capacity
change in a variable current and proportional to the height of the liquid.
Due to each application is different, given that the kind and the measures of the tank
and the products that it contains change, every unit must to be adjusted to be adapted
to each tank and product.
Using the menus of the NMC, this operation is very easy.
The circuit, controlled by microprocessor, stores all data and does the calculation. A
display LCD guides us in the calibration process.
The output current signal is 4 to 20 mA. These values can be sited where we want in
the probe.
6. Current simulation
Using this option, the NMC generates in the supply loop, a 4 to 20 mA current, in
steps of 1 mA. This function is very useful to make tests with independence of the
level of the tank.