User Manual

VEGAPULS 42 and 44 – 4 … 20 mA 63
Setup
It is convenient and quick to carry out the
adjustment without medium, as shown in the
example.
• Choose if you want to carry out the adjust-
ment in meters (m) or in feet (ft).
• Enter a distance for the upper and lower
level and the extent of filling in % corre-
sponding to each distance.
In the example, the 0 % filling is at a product
distance of 5.850 m and the 100 % filling at a
product distance of 1.270 m.
• Confirm with " OK “.
For level detection outside the operating
range, the operating range must be cor-
rected respectively in the menu " Sensor
optimisation/Operating range “.
You are again in the menu " Adjustment “.
The sensor electronics has two characteris-
tics points from which a linear proportionality
between product distance and the percent-
age of filling of the vessel is generated.
Of course, the characteristics points must not
necessarily be at 0 % and 100 %, however
they should be as far apart as possible (e.g.
at 20 % and at 80 %). The difference be-
tween the characteristics points for the min./
max. adjustment should be at least 50 mm
product distance. If the characteristics points
are too close together, the possible measur-
ing error increases. Ideal would be to carry
out the adjustment, as shown in the example,
at 0 % and at 100 %.
In the menu " Instrument data/Parameter ad-
justment/Conditioning/Linearisation “, you can
enter later, if necessary, a correlation be-
tween product distance and % extent of filling
other than linear.
• Click in the menu " Adjustment “ to " Quit “.
You are again in the menu window " Instru-
ment data parameter adjustment “.
Conditioning/Scaling
• Click to " Conditioning “.
The menu window " Conditioning “ opens.
• Click to " Scaling “.