45
6 Set up with the display and adjustment module
NCR-84 Two-wire 4 … 20 mA/HART
51141-EN-181127
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. 38: Parameterisation example, Min./max. adjustment
1 Min. level = max. measuring distance
2 Max. level = min. measuring distance
3 Reference plane
If these values are not known, an adjustment with the distances of e.g.
10 % and 90 % is possible. Starting point for these distance specifica-
tions is always the sealing surface of the thread or flange. You can find
specifications on the reference plane in chapter "
Technical data
". The
actual level is calculated on the basis of these settings.
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.
Proceed as follows:
1. Select with
[->]
the menu item Max. adjustment and confirm with
[OK]
.
2. Prepare the percentage value for editing with
[OK]
and set the
cursor to the requested position with
[->]
.
Setup - Adjustment
Setup - Max. adjustment
925-0373 Rev A