VEGA VEGAPULS 68 (≥ 2.0.0 - ≤ 3.8) Foundation Fieldbus - Manual (Page 39)

6.4 Setup procedure
As VEGAPULS 68 is a distance measuring instrument, the distance
from the sensor to the product surface is measured. To have the real
product level displayed, an allocation of the measured distance to the
percentage height must be made. To carry out this adjustment, the
distance is entered with full and empty vessel. If these values are not
known, an adjustment with the distance values, e.g. 10 % and 90 % is
also possible. Starting point for these distance specifications is always
the seal surface of the thread or flange. With these settings, the real
level is calculated. Furthermore the operating range of the sensor is
limited from maximum to the required range.
The real 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.
In the main menu item "Basic adjustment", the individual submenu
items should be selected one after the other and provided with the
correct parameter values.
Start your parameter adjustment with the following menu items of the
basic adjustment:
Proceed as follows:
1 Move from the measured value display to the main menu by
pushing [OK].
▶ Basic adjustment
Display
Diagnostics
Service
Info
2 Select the menu item "Basic adjustment" with [->] and confirm with
[OK]
. Now the menu item "Min. adjustment" is displayed.
Min. adjustment
0.00 %
=
5.000 m(d)
4.000 m(d)
3 Prepare the % value for editing with [OK] and set the cursor to the
requested position with [->]. Set the requested percentage value
with [+] and save with [OK]. The cursor jumps now to the distance
value.
4 Enter the suitable distance value in m for the empty vessel (e.g.
distance from the sensor to the vessel bottom) corresponding to
the percentage value.
5 Save the settings with [OK] and move to "Max. adjustment" with [-
>
] .
Parameter adjustment
Carrying out min. ad-
justment
VEGAPULS 68 • Foundation Fieldbus 39
6 Set up with the indicating and adjustment module PLICSCOM
29264
-EN
-090305