VEGA VEGABAR 81 4 … 20 mA_HART - Operating Instructions - Manual (Page 37)

37
6 Set up with the display and adjustment module
VEGABAR 81 • 4 … 20 mA/HART
45018-EN-131010
If with the automatic position correction, the actual measured value
should be taken over as corrective value, then this value must not be
influeces by product covering or a static pressure.
With the manual position correction, the offset value can be deter-
mined by the user. Select for this purpose the function "Edit" and
enter the requested value.
Save your settings with [OK] and move with [ESC] and [->] to the
next menu item.
When the position correction was carried out, then the actual meas-
ured value is corrected to 0. The corrective value appears with inverse
signs as offset value in the display.
The position correction can be repeated as often as necessary. How-
ever, if the sum of the corrective values exceeds 20 % of the nominal
measuring range, then no position correction is possible.
VEGABAR 81 always measures pressure independently of the pro-
cess variable selected in the menu item "Application". To output the
selected process variable correctly, an allocation to 0 % and 100 % of
the output signal 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:
2
1
100%
0%
5
m
(196.
9")
Fig. 36: 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
Setup - Adjustment