AUMA Electric multi-turn actuators SA 07.1 - 48.1_SAR 07.1 - 30.1 NORM - Manual (Page 22)

14.2 Setting the 3-/4- wire system 4 – 20 mA
.
Connect voltage to electronic position transmitter.
.
Move valve to end position CLOSED.
.
If installed, pull off indicator disc.
.
Connect ammeter for 0 – 20 mA to measuring points (figure P-2).
The circuit (external load) must be connected (max. load R
B
),
or the appropriate connections at the terminals (refer to
terminal plan) must be jumpered, otherwise no value can be
measured.
.
Turn potentiometer (E2) clockwise to the stop.
.
Turn potentiometer (E2) back a little.
.
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.
22
Multi-turn actuators SA 07.1 – SA 48.1 / SAR 07.1 – SAR 30.1
AUMA NORM
Operation instructions
Fig. P-3
Cover plate
Meas. point (+)
0/4 – 20 mA
“0” (0/4 mA) “max.” (20 mA)
E2
Meas. point (–)
0/4 mA – 20 mA