Samson TROVIS 3730-1, Mounting And Operating Instructions

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50 EB 8384-1 EN
Start-up
7.5 Initialization
NOTICE
The process is disturbed by the move-
ment of the actuator stem.
Do not initialize the positioner while
the process is running; only perform
an initialization during start-up with
the shut-off valves closed.
A signal pressure above the maxi-
mum permissible limit will damage
the valve.
Check the maximum permissible sig-
nal pressure of the control valve be-
fore starting initialization. If neces-
sary, limit the signal pressure by con-
necting an upstream pressure reduc -
ing valve.
Malfunction due to changed mount -
ing or installation circumstances.
Reset the positioner to its default set -
tings and re-initialize it after the posi-
tioner has been mounted on to an-
other actuator or its mounting loca -
tion 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 self-adaptation de-
pends on the preset parameters.
MAX is the default setting for the nominal
range (Code P4 ). During the initialization
process, the positioner determines the travel/
rotational angle of the closing element from
the CLOSED position as far as it will go in
the other direction.
Tip:
For normal operation, simply start
initialization over Code
P15 after
mounting the positioner on the valve,
checking the fail-safe position ( P2 )
and setting the volume restriction.
The positioner only needs to work
with its default settings.
Start initialization by activating Code P15 as
follows:
Turn

Code P15
Press and hold for six seconds.
6-5-4-3-2-1- is counted down on the display.
Initialization starts. The display blinks!
Note:
The time required for the initialization
procedure depends on the actuator
transit time and can take a few min
-
utes.
%
Initialization successfully
completed, positioner runs in
closed-loop operation
