Vega VEGABAR 86 Operating Instructions Manual page 28

6 Set up the sensor with the display and adjustment module
Units
Position correction
Parameterization example
28
In this menu item, the adjustment units of the instrument are deter-
mined. The selection determines the unit displayed in the menu items
" Min. adjustment (Zero)" and " Max. adjustment (Span)".
Unit of measurement:
If the level should be adjusted in a height unit, the density of the me-
dium must also be entered later during the adjustment.
In addition, the temperature unit of the instrument is specified. The
selection determines the unit displayed in menu items " Peak value,
temperature" and "in the variables of the digital output signal".
Temperature unit:
Enter the requested parameters via the appropriate keys, save your
settings with [OK] and jump to the next menu item with the [ESC] and
the [->] key.
Especially with chemical seal systems, the installation position of the
instrument can shift (offset) the measured value. Position correction
compensates this offset. In the process, the actual measured value
is taken over automatically. With relative pressure measuring cells a
manual offset can also be carried out.
Note:
If the current measured value is automatically accepted, it must not
be falsified by medium coverage or 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.
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 86 always measures pressure independently of the pro-
cess variable selected in the menu item " Application". To output the
VEGABAR 86 • Modbus and Levelmaster protocol