VEGA VEGAPULS 66 (≥ 2.0.0 - ≤ 3.8) Profibus PA - Manual (Page 34)

6.4 Setup procedure
Before starting the actual parameter adjustment of a Profibus PA
sensor, the address setting must first be carried out. You will find a
detailed description in the operating instructions manual of the
indicating and adjustment module or in the online help of PACTware or
DTM.
As VEGAPULS 66 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.
Caution:
If there is a separation of liquids with different dielectric values in the
vessel, e.g. from condensation, VEGAPULS 66 can detect under
certain circumstances only the medium with the higher dielectric value.
Keep in mind that interfaces can cause faulty measurements.
If you want to measure the total height of both liquids reliably, please
contact our service department or use an instrument specially
designed for interface measurement.
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
Address setting
Parameter adjustment
Carrying out min. ad-
justment
34 VEGAPULS 66 • Profibus PA
6 Set up with the indicating and adjustment module PLICSCOM
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-EN
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