Samson 3730-4, Original Instructions Manual

Page: 65 / 128

EB 8384-4 EN 65
Start-up and settings
Press . The positioner changes to the man-
ual mode ( ).
Check the operating range:
Manual set point w
(current angle of rotation is
indicated)
Turn

Code 1
Press , Code 1 and icon blink.
Turn until the pressure in the positioner
builds up, and the control valve moves to its
final positions so that the travel/angle can
be checked.
The angle of rotation of the lever on the back
of the positioner is indicated. A horizontal
lever (mid position) is equal to 0°.
To ensure the positioner is working proper-
ly , the outer bar elements must not blink
while the valve is moving through the operat-
ing range.
Exit Code 1 by pressing the rotary pushbut -
ton ( ).
The permissible range has been exceeded
when the displayed angle is more than 30°
and the outer right or left bar element blinks.
The positioner goes to the fail-safe position
(SAFE).
After canceling the fail-safe position (SAFE)
(see section 8.2.2) it is absolutely essential
that you check the lever and pin position as
described in section 4.
Risk of injury due to the actuator stem ex -
tending or retracting.
Before exchanging the lever or changing the
pin position, disconnect the supply air and
electrical auxiliary power.
7.6 Initialization
The process is disturbed by the movement of
the actuator stem.
Do not initialize the positioner while the pro
-
cess is running; only perform an initializa -
tion during start-up with the shut-off valves
closed.
A signal pressure above the maximum per -
missible limit will damage the valve.
Check the maximum permissible signal pres
-
sure of the control valve before starting ini -
tialization. If necessary, limit the signal pres -
sure by connecting an upstream pressure re -
ducing valve.
Malfunction due to changed mounting or in -
stallation circumstances.
Reset the positioner to its default settings and
re-initialize it after the positioner has been
mounted on to another actuator or its mount
-
ing location has been changed.
During initialization the positioner adapts it -
self optimally to the friction conditions and
the signal pressure required by the control
valve. The type and extent of auto tuning de-
pends on the initialization mode selected:
WARNING !
NOTICE !