VEGA VEGABAR 81 4 … 20 mA_HART - Operating Instructions - Manual (Page 38)

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6 Set up with the display and adjustment module
VEGABAR 81 • 4 … 20 mA/HART
45018-EN-131010
If these values are not known, an adjustment with levels of for exam-
ple 10 % and 90 % is also possible. By means of these settings, the
real filling height is then calculated.
The real product level during this adjustment is not important, be-
cause the min./max. adjustment is always carried out without chang-
ing 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 [->].
3. Set the requested mbar value with [+] and store with [OK].
4. Move with [ESC] and [->] to the span adjustment
The zero adjustment is finished.
Information:
The zero adjustment shifts the value of the span adjustment. The
span, i.e. the difference between these values, however, remains
unchanged.
For an adjustment with pressure, simply enter the actual measured
value indicated at the bottom of the display.
If the adjustment ranges are exceeded, the message "Outside param-
eter limits" appears. The editing procedure can be aborted with [ESC]
or the displayed limit value can be accepted with [OK].
Proceed as follows:
1. Select with [->] the menu item "Span adjustment" and confirm
with [OK].
Setup - zero adjustment
Setup - span adjustment