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Press the button briefly to obtain a travel
calibration for valve CLOSED when the actu
-
ator stem extends.
Direction of action: Increasing/increasing.
Hold the button pressed for longer than 3
seconds (indicated by switchover from sig
-
nal 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.
After pressing the travel calibration but
-
ton (4), the actuator stem first moves as far
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
65
2
13
431 72 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 rated travel 15
Gear (12)
Position for rated travel 30
Intermediate gear
Rated travel
inscription
Intermediate gear