Samson 3274 - Page 43

EB 8340 EN 7-3
Start-up
Settingsfordirectionofactionincreasing/increasing(>>)andincreasing/decreasing(<>):
1. Disconnect isolating terminal 81:
Red marking pin
Release button
2. Move the actuator stem to the lower end position.
Actuators with electric override: press button (arrow symbol).
Actuators with mechanical override: use a wrench.
3. Position the segment gear S1 with the corresponding arrow tip depending on the valve
ratedtravel(15or30mm)pointingtowardstheaxisofthepotentiometerP1:
15
30
P1
S1
P2
Segmentfor15mmtravel
Segmentfor30mmtravel
Position of the arrow when the
actuator stem is fully extended
4. Hold the segment gear S1 and turn the axis of potentiometer P1 clockwise using a suit-
able screwdriver as far as it will go.
5. Connect a suitable current or voltage source to the input signal terminals (11 to 13) ac-
cording to the wiring diagram. Connect an ammeter to terminals 31 (+) and 32 (–).
Calibrationfordirectionofactionincreasing/increasing(>>):
1. Set slider switch SW2 to OFF.
2. Turn 'Zero in' adjuster counterclockwise as far as it will go. Turn the 'Span in' adjuster to
the middle marking: