VEGA VEGABAR 87 Save sensor - Operating Instructions - Manual (Page 30)

30
6 Set up with the display and adjustment module
VEGABAR 87 • Slave sensor for electronic differential pressure
45053-EN-131011
Save your settings with [OK] and move with [ESC] and [->] to the
next menu item.
After the position correction is carried out, the actual measured value
is corrected to 0. The corrective value appears with an inverse sign 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 87 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 "Interface" the hydrostatic pressure at min. and
max. height of the interface is entered for adjustment. See the follow-
ing example:
2
1
100%
0%
2
m
(78.74
")
h
0,8
1,0
Fig. 20: Parameter adjustment example "Min./max. adjustment, interface
measurement"
1 Min. interface = 0 % correspond to 0.0 mbar
2 Max. interface = 100 % correspond to 490.5 mbar
3 VEGABAR 87
4 VEGABAR 87 - Slave sensor
If these values are not known, an adjustment with interface layers of
for example 10 % and 90 % is also possible. By means of these set-
tings, the layer of the actual interface is then calculated.
The real product level during the adjustment is not important,
because the 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.
Parameterization example