Samson 3274 Mounting And Operating Instructions page 24

Operation
Calibration for direction of action increasing/increasing (>>):
6. Set slider switch SW2 to OFF.
7. Turn "Zero in" adjuster counterclockwise as far as it will go. Turn the "Span in" adjuster
to the middle marking:
Zero
in
60
40 80
20
100
%
0
8. Slowly turn the "Zero in" adjuster clockwise until the LED turns off. Turn it slightly further
until the LED lights up again.
9. Use the override to move the valve to the top end position (retract the actuator stem).
10. Set the voltage or current source to 10 V or 20 mA.
11. Turn the "Span out" adjuster until the output signal is 20 mA.
12. Slowly turn the "Span in" adjuster clockwise until the LED turns off. Turn it slightly further
until the LED lights up again.
13. Connect isolating terminal 81 or perform further settings for direction of action increas-
ing/decreasing:
Red marking pin
Release button
24
Span Span
out in
on
off
1 2 3 4
EB 8340 EN