32
7 Set up with the integrated display and adjustment unit
VEGAPULS 31 • Two-wire 4 … 20 mA/HART
57820-EN-191014
•
Properties, sensor:
– Sensor accepts all measured value changes within the measur-
ing range immediately
– High sensitivity to interference, because virtually no averaging
In this menu item you select the unit for measured distance in mm, m,
in or ft.
Since the radar sensor is a distance measuring instrument, it is the
distance from the sensor to the product surface that is measured. To
indicate the actual level, the measured distance must be assigned to
a certain height percentage.
To perform the adjustment, enter the distance with full and empty ves-
sel, see the following example:
100%
0%
0,5 m (19.68
")
5 m
(196.9
")
2
1
3
Fig. 22: Parameterisation example, Min./max. adjustment
1 Min. level = max. measuring distance
2 Max. level = min. measuring distance
3 Reference plane
The starting point for these distance specifications is always the
reference plane, i.e. the lower edge of the sensor. Information on the
reference plane can be found in the chapters "
Mounting
" and "
Techni-
cal data
". The actual filling height is then calculated on the basis of
these entries.
The actual product level during this adjustment is not important,
because the min./max. adjustment is always carried out without
changing the product level. These settings can be made ahead of
time without the instrument having to be installed.
Unit distance
Adjustment
