Initialization - Samson 3730-2 Mounting And Operating Instructions

Start-up and settings
Check the operating range:
Turn  Code 1
Press , Code 1 and
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.
66
Manual set point w
(current angle of rotation is
indicated)
icon blink.
WARNING
!
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

NOTICE
!
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:
EB 8384-2 EN