Samson 3730-5 - Start-up - Settings; Defining the valve closed position

7 Start-up – Settings
WARNING!
Attach the positioner, keeping the following
sequence:
1. Mount the positioner on the control valve
2. Connect the supply air
3. Connect the electrical power
4. Perform the start-up settings
Reading on display after connecting the
electrical auxiliary power:
4
tEStinG runs across the display and then
the fault alarm icon appears and
blinks on the display when the positioner
has not yet been initialized. The reading
indicates the lever position in degrees in
relation to the longitudinal axis.
Reading when the
positioner has not yet been
initialized
4
If Code 0 appears on the display when a
positioner has been initialized. The
positioner is in the last active operating
mode.
WARNING!
The actuator stem moves while the start-up
settings are being performed.
Do not touch the actuator stem or obstruct it
to avoid risk of injury to hands or fingers.
NOTICE
Perform the start-up settings in the same se
-
quence as listed (section 7.1 to section 7.6).
Note: The positioner performs a test in the
start-up phase while following its automa
-
tion task at the same time. During the
start-up phase, operation on site is unre
-
stricted, yet write access is limited.
7.1 Defining the valve closed
position
To adapt the positioner to the operating di-
rection of the actuator, set slide switch to
AIR TO OPEN or AIR TO CLOSE .
4
AIR TO OPEN = Signal pressure opens
the valve, for fail-safe position: actuator
stem extends/fail close
4
AIR TO CLOSE = Signal pressure closes
the valve, for fail-safe position: actuator
stem retracts/fail open.
NOTICE
The AIR TO OPEN (AtO) setting always ap
-
plies to double-acting actuators.
For checking purposes:
After successfully completing initialization,
the positioner display should read 0 % when
the valve is closed and 100 % when the
valve is open. If this is not the case, change
the slide switch position and re-initialize the
positioner.
52 EB 8384-5 EN
Start-up – Settings