17.2 Setting 3-/4- wire system 4 – 20 mA
.
Connect voltage to electronic position transmitter.
.
Move valve to
end position CLOSED
.
.
Connect ammeter for 0 – 20 mA to measuring points (figure 40).
The circuit (external load) must be connected
(observe max. load R
B
), or the appropriate poles at the termi-
nals (refer to wiring diagram) must be linked, otherwise no
value can be measured.
.
Turn potentiometer (E2) clockwise to the stop.
.
Turn potentiometer (E2) slightly back.
.
Turn potentiometer “0” clockwise until output current starts to increase.
.
Turn back potentiometer “0” until a residual current of approx. 0.1 mA is
reached.
.
Move valve to end position OPEN.
.
Set potentiometer “max.” to end value 16 mA.
.
Move valve to end position CLOSED.
.
Set potentiometer “0” from 0.1 mA to initial value 4 mA.
This results in a simultaneous shift of the end value by 4 mA, so that the
range is now 4 – 20 mA.
.
Approach both end positions again and check setting. If necessary, correct
the setting.
If the maximum value cannot be reached, the selection of the
reduction gearing must be checked.
30
Multi-turn actuators SA 07.1 – SA 30.1/SAR 07.1 – SAR 30.1
with actuator controls AUMA MATIC AM 01.1/AM 02.1
Operation instructions
Figure 40
“0” (0/4 mA)
“max.” (20 mA)
Meas. point (+)
0/4 – 20 mA
Meas. point (–)
0/4 – 20 mA
Cover plate
E2
