VEGA VEGABAR 41 Profibus PA - Manual (Page 21)

VEGABAR 41 (Profibus PA) 21
Setup
Adjustment without taking the current
pressure into account (dry adjustment)
Adjustment without pressure comprises four
steps:
1 Selection of the unit in which the adjustment
is to be carried out
2 Offset correction
3 Adjustment of zero
4 Adjustment of span
The offset correction (only in gauge pressure
mode) defines the reference position for the
measurement. It can be carried out:
- before or after adjustment of zero and
span
- before or after installation of VEGABAR.
VEGABAR must be unpressurised for the
offset correction!
Adjustment without pressure can be carried
out with the instrument mounted or
dismounted (e.g. workroom). Any ambient
pressure has no effect on the adjustment.
1 Selection of the unit
Choose the unit with the "+“ or "–“
key. Save the selected unit with the
"OK“ key.
3 Adjustment of zero
Adjust zero with the "+“ or "–“ key
and save with the "OK“ key.
4 Adjustment of span
Adjust span with the "+“ or "–“ key
and save with the "OK“ key.
Note:
- A modification of zero does not influence
the span.
- By pushing the "+“ and "–“ keys, the output
current remains on the last value - only
after saving with the "OK“ key will the
output current take on the adjusted value.
Evaluation
Linearisation curve
Is only displayed if a linearisation
curve has been activated with VVO.
Adjustment of the integration time
An integration time t
i
of 0 s ... 50 s
can be adjusted with the “+” or “-”
key for damping of pressure
shocks. The adjusted value can be saved
with the "OK“ key.
Selection of the indicated unit
Here the unit and therefore the
value for the display of measured
values as well as for the display
module can be selected (with the
"+“ or "–“ key and the "OK“ key). If
you select "scal.“, the scaled PA
output value will be displayed (as
adjusted under "Scaling out.“).
ti
1
s
Lin.-
curve
active
Zero
0,0
mbar
Span
100,0
mbar
Unit
0,0
bar
mbar
psi
kPa
%
m
ft
inch
Adjust.
without
Press.
Unit
0,0
bar
mbar
psi
kPa
inHg