Samson 3374 - Adjusting the Resistance Transmitter

6-2 EB 8331-3 EN
Start-up
B
B
22 Gearforpotentiometer1
22.1 Axis of potentiometer 1
23 Gearforpotentiometer2
23.1 Axis of potentiometer 2
22.1
22
23.1
23
Fig.6-4: Zero adjustment
6.2 Adjusting the resistance
transmitter
The gears of the resistance transmitters (22)
and (23) must be put onto their shafts to cor-
respond with the rated travel of the valve.
Theratedtravelinscription'A'for30mm
ratedtravelor'B'for15mmratedtravel
must be legible.
If this is not the case, pull both potentiometer
gears off their shafts and put them back on
again with the reverse side of the wheel fac-
ing upwards, ensuring they are aligned fair-
lyushwiththepotentiometershaft.
Zero adjustment
1. Use the motor or manual override to
move the valve to the desired end posi-
tion.
2. Use a screwdriver to adjust the potenti-
ometer shafts (22.1) and (23.1).
3. Calibrate the resistance transmitters us-
ing an ohmmeter correspondingly.
Actuator stem extended:
Terminals81/82=0Ω
Terminals91/93=0Ω
Actuator stem retracted:
Terminals81/83=0Ω
Terminals91/92=0Ω