VEGA VEGABAR 25 - Manual (Page 14)

14 VEGABAR 25
OPERATE
t
SPAN
ZERO
i
Key +: Change
value (raising)
Key –: Change
value (falling)
Rotating switch: Choose
required function
Set-up
Indicating module VEGABAR
8 7 6 5 4 3 2 1
4 ¼ 20 mA DISPLAY
VEGADIS 10
12 ¼ 36 V DC E12
+ -
+
-
OK
0 - 20 bar
Loosely tighten screws
4 Set-up
Electrical connection and set-up can be sim-
plified by temporarily mounting the cover or
indicating module on VEGABAR or laterally
displaced downwards.
4.1 Adjustment of the basic
functions
Adjustment elements
Adjustment system
• Select the required function with the rotat-
ing switch.
• Change the value with keys “+“- and “–“.
• Reset rotating switch to OPERATE, the
adjusted values are transferred to the
EEPROM-memory. They remain there even
on voltage loss.
Adjustment
For adjustment of zero and span, a current
meter must be connected to terminals 1 and
3. The measured value is identical with the
output current.
1 Adjustment of zero
(e.g. process pressure zero or empty
vessel)
• Set rotating switch to zero
• By pushing the “+“ and “–“-keys simultane-
ously, the current jumps directly to 4 mA or
set it to 4 mA by pushing the “+“ and “–“-
keys
Adjustment range of zero:
-20 % … +95 % of the nominal measuring
range (corresponds to turn up of up to
+95 %)
2 Adjustment of span
(e.g. process pressure or vessel level
maximum)
• Set rotating switch to span
• By pushing the “+“ and “–“-keys simultane-
ously, the current jumps directly to 20 mA
or set it to 20 mA by pushing the “+“ and “–
“-keys
Adjustment range of span:
3,3 % … 120 % of the nominal measuring
range (corresponds to turn down 1 : 30)
Note:
- A modification of zero does not influence
the span.
- It is also possible to adjust currents for
partial fillings or partial pressures, e.g.
8 mA for 25 % and 16 mA for 75 %. VEGA-
BAR automatically calculates the current
values for 0 % or 100 % (only possible with
³ 3,3 %).