Adjusting The Resistance Transmitter - Samson 3374 Mounting And Operation Instructions

Start-up
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 flush with the potentiometer shaft.
Fig. 6-4: Zero adjustment
6-2
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
22
22.1 Axis of potentiometer 1
23
23.1 Axis of potentiometer 2
22.1
22
23.1
23
Gear for potentiometer 1
Gear for potentiometer 2
EB 8331-3 EN