14.2 Setting 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 A (refer to wiring diagram).
The circuit (external load) must be connected (observe
max. load R
B
), or the appropriate poles at the terminals
(refer to wiring diagram) must be linked, otherwise no
value can be measured.
.
Turn setting spindle (A) clockwise until stop is felt.
.
Turn potentiometer (P1) clockwise until output current starts to increase.
.
Turn back potentiometer (P1) until a residual current of approx. 0.1 mA
has been reached.
.
Move valve to end position OPEN.
.
Set potentiometer (P2) to end value 16 mA.
.
Move valve to end position CLOSED.
.
Set potentiometer (P1) 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 anew and check setting. If necessary, correct
the setting.
If the maximum value cannot be reached, the selection of the
reduction gearing must be checked.
23
Multi-turn actuators SAI 6 – SAI 100 / SARI 6 – SARI 100
Operation instructions
for valve automation Inside Containment in nuclear power plants
A
P1
P2
Figure N-2: Electronic position transmitter
