Samson Electri Actuator Type 3374 EB 8331-1 EN - Manual (Page 15)

Press the button briefly to obtain a travel cal-
ibration for valve CLOSED when the actua-
tor stem extends.
Direction of action: Increasing/increasing.
Hold the button pressed for longer than
three seconds (indicated by switchover from
signal lamp 8 to signal lamp 9) to obtain a
travel calibration for valve CLOSED when
the actuator stem retracts.
Direction of action: Increasing/decreasing.
CAUTION!
The automatic travel calibration lasts
approximately twice as long as the
actuator's transit time. During this
period, the valve leaves its current
position. Calibrate the travel either
on the test bench or when the
shut-off valves in the plant are
closed.
EB 8331-1 EN
15
Operation and setting
Fig. 6 · Selector switch and position of potentiometer gears in version with digital positioner
12
12.1
B
Stellungsregler
Positioner
Régulateur de position
SAMSON
10
9
11
6 5
2
1 3
4 3 1 7 2 8 1 Operating mode 1
2 Selector switch
3 Operating mode2
4 Travel calibration button
5 Operating mode 0
6 Operating mode 3
7 Potentiometer counter-
clockwise or clockwise
8 Signal lamp
9 Signal lamp
10 Actuator stem extends
and retracts
11 Interface jack
12 Potentiometer gear
12.1 Potentiometer shaft
Intermediate gear
Gear (12)
Position for 15 mm
rated travel (B)
Gear (12)
Position for 30 mm
rated travel (A)
Intermediate gear
Rated travel
inscription
Intermediate gear