VEGA VEGAPULS 65 (≥ 2.0.0 - ≤ 3.8) Profibus PA - Manual (Page 33)

Each product has different reflective properties. In addition, there are
various interfering factors which have to be taken into account:
agitated product surfaces and foam generation (with liquids); dust
generation, material cones and echoes from the vessel wall (with
solids). To adapt the sensor to these different conditions, you should
first select "Liquid" or "Solid".
Medium
Liquid
According to the conductivity and the dielectric value of liquids, the
reflection properties can differ considerably. Therefore additional
options such as "Solvent", "Chem. mixture" and "Water based" are
offered below the menu item Liquid.
With solids, you can also choose between "Powder/Dust", "Granular/
Pellets" or "Ballast/Pebbels".
Through this additional selection, the sensor is adapted perfectly to the
product and measurement reliability, particularly in products with bad
reflective properties, is considerably increased.
Enter the requested parameter via the appropriate keys, save your
settings and jump to the next menu item with the [->] key.
Apart from the medium, the vessel shape can also influence the
measurement. To adapt the sensor to these measuring conditions, this
menu item offers different options depending on whether liquid or solid
is selected. With "Liquids" these are "Storage tank", "Stilling tube",
"
Open vessel" or "Stirred vessel", with "Solid", "Silo" or "Bunker".
Vessel form
Storage tank
Enter the requested parameter via the appropriate keys, save your
settings and jump to the next menu item with the [->] key.
A linearization is necessary for all vessels in which the vessel volume
does not increase linearly with the level - e. g. with a cylindrical or
spherical tank - and the indication or output of the volume is required.
Corresponding linearization curves are preprogrammed for these
vessels. They represent the correlation between the level percentage
and vessel volume. By activating the appropriate curve, the volume
percentage of the vessel is displayed correctly. If the volume should
not be displayed in percent but e.g. in l or kg, a scaling can be also set
in the menu item "Display".
Medium selection
Vessel form
Linearisation curve
VEGAPULS 65 • Profibus PA 33
6 Set up with the indicating and adjustment module PLICSCOM
28447
-EN
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