Operation; Operator Controls And Display - Samson 3730-2 Mounting And Operating Instructions

Operation

4 Operation
Note!
A summary about operating and start up
can be found in section 7 on page 57. A
leaflet including the same summary is also
enclosed with the positioner.
4.1 Operator controls and
display
Rotary pushbutton
The positioner is mainly operated with the
rotary pushbutton.
Turn the button to select and set codes,
parameter and values. Press it to confirm
them.
Slide switch AIR TO OPEN or AIR TO
CLOSE
This switch is used to adapt the positioner to
the operating direction of the actuator.
For actuator where the supply pressure
opens the valve, fail-safe position: "springs
close valve": switch position AIR TO OPEN.
For actuator where the supply pressure
closes the valve, fail-safe position: "springs
open valve": switch position AIR TO CLOSE.
For positioners with an attached reversing
amplifier for double-acting rotary actuators
(section 2.5): switch position AIR TO OPEN.
The switch position is prompted prior to an
initialization. After an initialization has been
completed, changing the switch position
does not have any effect on the operation of
the positioner.
38
EB 8384-2 EN
Volume restriction Q
The volume restriction is used to adapt the
air delivery to the actuator size. Two fixed
settings are possible depending on how the
air is routed at the actuator:
4
For actuators smaller than 240 cm
a loading pressure connection at the side
(Type 3271-5), set restriction to MIN
SIDE.
4
For a connection at the back (Type
3277-5), set restriction to MIN BACK.
4
For actuators 240 cm
MAX SIDE for a side connection and to
MAX BACK for a connection at the back.
Displays
The LC display indicates symbols that are
assigned to parameters, codes and func-
tions.
The bar graph in the operating modes Man-
ual and Automatic
tem deviation that depends on the sign
(+/−) and the value. One bar graph ele-
ment appears per 1 % system deviation.
If the device has not yet been initialized (see
section 4.3.1), the lever position in degrees
in relation to the longitudinal axis is indi-
cated instead of the system deviation. One
bar graph element corresponds to approxi-
mately a 5° angle of rotation.
If the fifth element blinks (value displayed
> 30°), the permissible angle of rotation has
been exceeded. Lever and pin position must
be checked.
2 with
2 and larger, set to
indicates the sys-