Samson 3724, Mounting And Operating Instructions

Page: 22 / 40

22 EB 8395 EN
Operating the positioner
Volume restriction Q
The volume restriction serves to adapt the air
output capacity to the size of the actuator.
Two fixed settings are possible (refer to sec
-
tion 7.3).
Reading
Display Meaning
ESC Stop
Err Faults
LOW w too low
MAN Manual mode
MAX Maximum range
RST Reset
INIT Initialization
ON/OFF Activated/deactivated
ZERO Zero calibration
Icons which are assigned to certain codes
and functions are indicated on the display.
The bar elements indicate the system devia-
tion that depends on the sign (+/–) and the
value.
One bar element appears per 1 % set point
deviation.
If the positioner has not yet been initialized,
the position of the pick-up rod is indicated in
the operating range of ±10 mm.
If the fault indication icon is displayed,
press or until
ERR is displayed to view
the relevant E0 to E15 error code(s) (see
code list in section 33 on page 9.1).
7 Operating the positioner
The process is disturbed by the movement of
the actuator stem.
Do not perform the initialization while the
process is running. First isolate the plant by
closing the shut-off valves.
Î
Perform pneumatic connections on the
actuator as described in
u
EB 8315.
Î
Connect the supply air to signal pressure
connection.
Î
Check whether a vent plug or silencer is
screwed into the exhaust port.
Î
Connect the 4 to 20 mA signal.
à
Ter11/–12
Î
Connect software limit contacts, if appli -
cable.
à
Ter41/–42:
(limit contact 1, min.)
à
Ter51/–52:
(limit contact 2, max.)
−
LOW on the display indicates that the
reference variable is lower than 3.8 mA.
−
The positioner is ready for operation with
its default settings for most applications.
NOTICE !
Note