VEGA VEGABAR 41 4 … 20 mA - Manual (Page 18)

18 VEGABAR 41 (4 … 20 mA)
Setup
2 Adjustment of span
(e.g. process pressure or vessel level at
maximum)
• Set rotary switch to span
• By pushing the "+“ and "–“ keys (simulta-
neously) 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 range (corre-
sponds 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 at
≥
3.3 %).
Integration time
An integration time t
i
of 0 … 10 s can be ad-
justed for damping of pressure shocks.
Procedure
• Set rotary switch to t
i
• By pushing the "-“ key 10 times make sure
that the integration time is set to 0 s
• For every 1 s requested integration time,
push the "+“ key once
The integration time is the time required by
the current output signal to reach 90 % of the
actual level after a sudden change of the
process pressure.