24
14.3
Set current output
Notes on current output:
• The current output must be set in % or in the
units of linearization.
• Measuring range spread: The beginning
and end of the current range can be set as
required with partial ranges of the total span
also being assigned.
• The current output can also be inverted so
that the value in V0H5 is greater than that in
V0H6. An increased measured value will
decrease the signal current.
• Output damping: The effect of the output
damping is to attenuate the analogue output
and the measurand indication on the display
of the LUC-T. When the liquid surface is not
steady, a steady reading can be obtained
with the aid of the output damping.
0 s = without damping
1…255 s = with damping
• Current on fault (V0H7)
• 4 mA threshold: The 4 mA threshold
ensures that no value falls below this during
measurement.
Errors and warnings in V9H0
E620: The current output is outsidethe set
range (smaller than 3.8 mA, greater 20.5 mA).
Check the calibration and settings of the
current output.
2 Types of measurement
"
Continuous current output
The current from 4 mA to 20 mA is assigned to
a measuring range.
#
Switch current output
The current values 4 mA and 20 mA or 8 mA
and 16 mA are set as switchpoints.
4-wire
2-wire
4 mA ... 20 mA, 4/20 mA, 8/16 mA
-10 %
2.4 mA
3.8 mA
+110 %
22 mA
22 mA
#
VH
Entry
Text
1
V8H1
e. g. 0
H
Current output
0: linear
4 mA ... 20 mA
1: linear
4 mA ... 20 mA
with 4 mA threshold
2
V0H5
e. g. 10 % H
Level for 4 mA
3
V0H6
e. g. 90 % H
Level for 20 mA
4
V0H4
e. g. 20 s
H
Output damping
5
V0H7
e. g. 1
H
Output on fault
0: -10 %
1:+110 %
2: HOLD (holds last
measured value)
Height
V0H6 90 %
V0H5 10 %
4 mA
20 mA
#
VH
Entry
Text
1
V8H1
e. g. 2
H
Current output
2: digital 4/20 mA
3: digital 8/16 mA
2
V0H5
e. g. 10 %
H
Switchpoint min.
4 mA or 8 mA
3
V0H6
e. g. 90 %
H
Switchpoint max.
20 mA or 16 mA
4
V0H4
e. g. 10 s
H
Output damping
5
V0H7
e. g. 1
H
Output on fault
0: –10%
1: +110%
2: HOLD (holds last
measured value)
Height
V0H6 90 %
V0H5 10 %
4 mA
20 mA
8 mA
16 mA