VEGA VEGABAR 21 - Manual (Page 16)

16 VEGABAR 21
8 7 6 5 4 3 2 1
4 ¼ 20 mA DISPLAY
VEGADIS 10
12 ¼ 36 V DC E12
+ -
+
-
OK
OPERATE
t
SPAN
ZERO
i
Key +: Change
value (raising)
Key –: Change
value (falling)
Rotating switch: Choose the
requested function
Set-up
Indicating module VEGABAR
Tighten screws moderately
4 Set-up
The electrical connection as well as the set-
up can be facilitated by mounting the cover
or indicating module short-term laterally or
displaced to the bottom on VEGABAR.
4.1 Adjustment of the basic
functions
Adjustment elements
Adjustment system
• Select the requested 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
in case of 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
adjusting by pushing the “+“ and “–“-keys
a current of 4 mA
Adjustment range of zero:
-20 % … +95 % of the nominal measuring
range
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 adjusting by pushing the “+“ and “–“-
keys a current of 20 mA
Adjustment range of span:
3,3 % … 120 % of the nominal measuring
range
Note:
- A modification of zero does not influence
the span.
- It is also possible to adjust currents for
part fillings or part pressures, e.g. 8 mA for
25 % and 16 mA for 75 %. VEGABAR cal-
culates automatically the current values for
0 % or 100 % (only possible with
³ 3,3 %).