VEGA VEGAPULS WL 61 Profibus PA - Manual (Page 25)

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6 Set up
VEGAPULS WL 61 • Profibus PA
38062-EN-121011
6 Set up
6.1 DD adjustment programs
Device descriptions as Enhanced Device Description (EDD) are
available for DD adjustment programs such as, for example, AMS™
and PDM.
The files can be downloaded at www.vega.com/downloads under
"Software".
6.2 Adjustment
Since a radar sensor is a distance measuring instrument, the distance
from the sensor to the product surface is measured. For indication of
the real level, an allocation of the measured distance to the percent-
age height must be carried out. To perform the adjustment, enter the
distance with full and empty vessel, see the following example:
2
1
0,5 m (19.68
")
5 m
(196.85
")
100%
0%
Fig. 24: Parameterization example
1 Min. level = max. meas. distance
2 Max. level = min. meas. distance
If these values are not known, an adjustment with the distances of for
example 10 % and 90 % is possible. Starting point for these distance
specifications is always the seal surface of the thread or flange. By
means of these settings, the real level will be calculated.
The real product level during this adjustment is not important, be-
cause the min./max. adjustment is always carried out without chang-
ing the product level. These settings can be made ahead of time
without the instrument having to be installed.