Samson 3730-2 Mounting And Operating Instructions page 47

Note!
For MAX initialization, the positioner cannot
indicate nominal travel/angle of rotation in
mm/°, Code 5 remains disabled.
In addition, the lower (Code 8) and the up-
per (Code 9) x-range value can only be dis-
played and modified in %.
During MAX initialization, an increased sys-
tem deviation (undefined final position of the
actuator) in the upper control range may oc-
cur with some control valves due to the
pneumatic actuator design.
If you want the display to indicate mm/°,
proceed as follows after configuration has
been enabled:
Turn → Code 4 , press
turn → Select pin position entered
during installation, press
If you now switch to Code 5 , the nominal
range appears in mm/°.
The lower and upper x-range values for
Code 8 and 9 are displayed in mm/° and
can be adapted accordingly.
NOM – Initialization based on nominal
range
Initialization mode for globe valves, espe-
cially for valves with maximum ranges that
are clearly greater than the required nomi-
nal range.
For this initialization mode, the following
parameters must be entered: pin position
(Co de 4 ), nominal travel/angle (Code 5 )
and, if required, the direction of action
(Code 7 ).
The calibrated sensor enables the effective
valve travel to be preset very accurately.
,
.
During the initialization procedure, the
positioner checks whether the control valve
can move through the indicated nominal
range (travel or angle) without collision.
In case of a positive result, the indicated
nominal range is adopted with the limits of
lower x-range and upper x-range values as
the operating range.
Note!
The maximum possible travel must always
be greater than the nominal travel entered.
If this is not the case, the initialization is
interrupted (error indication Code 52) be-
cause the nominal travel is not achieved.
Enable configuration:
Turn → Code 3 , press
turn → ON , press
After enabling:
mm
Turn → Code 4 , press
turn → Select pin position entered dur-
ing installation, press
Start-up and settings
Default OFF
,
.
Default OFF
,
.
EB 8384-2 EN
47