Vega VEGABAR 86 Operating Instructions Manual page 33

Zero adjustment
VEGABAR 86 • Foundation Fieldbus
selected process variable correctly, an allocation of the output signal
to 0 % and 100 % must be carried out (adjustment).
With the application "Level", the hydrostatic pressure, e.g. with full
and empty vessel, is entered for adjustment. See following example:
Fig. 27: Parameter adjustment example Min./max. adjustment, level measure-
ment
1 Min. level = 0 % corresponds to 0.0 mbar
2 Max. level = 100 % corresponds to 490.5 mbar
If these values are not known, an adjustment with filling levels of e.g.
10 % and 90 % is also possible. By means of these settings, the real
filling height is then calculated.
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.
Note:
If the adjustment ranges are exceeded, the entered value will not be
accepted. Editing can be interrupted with [ESC] or corrected to a
value within the adjustment ranges.
For the other process variables such as e.g. process pressure, differ-
ential pressure or flow, the adjustment is performed in like manner.
Proceed as follows:
1. Select the menu item "Setup" with [->] and confirm with [OK].
Now select with [->] the menu item "Zero adjustment" and confirm
with [OK].
2. Edit the mbar value with [OK] and set the cursor to the requested
position with [->].
6 Set up with the display and adjustment module
2
100%
1
0%
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