Samson 3730-1 - Zero Calibration Procedure

76 EB 8384-1 EN
Operating the positioner
%
Initialization
successfully completed,
positioner runs in
closed-loop operation
After a successful initialization, the posi-
tioner runs in closed-loop operation indi-
cated by the
closed-loop operation icon
andcontrolpositionin%predetermined
by the set point on the display.
A malfunction leads to the process being
interrupted. The
fault indication icon is
displayed.Seesection9.
Canceling initialization
The initialization can be canceled by press-
ing
.
Press
, blinking display: ESC
Press
toconrmcancellation.
Example 1: A positioner that has not yet
been initialized goes to the fail-safe position
after the initialization process has been can-
celed.
Example 2: The initialized positioner goes to
AUTO mode after the re-initialization pro-
cess has been canceled. The settings of the
previous initialization are used.
7.6 Zero calibration
In case of inconsistencies in the fail-safe po-
sition of the valve, e.g. with soft-seated
plugs, it might be necessary to recalibrate
zero.
Start the zero calibration by activating Code
P16 as follows:
1. Turn untilCodeP16appears.
2. Press
and hold for six seconds.
Reading: 6-5-4-3-2-1-
Zero calibration starts, the display
blinks.
The positioner moves the control valve to
the CLOSED position and recalibrates the
internal electric zero point.
When the zero calibration has been suc-
cessfully completed, the positioner returns
to closed-loop operation (display with sta-
tus indication).
Canceling zero calibration
The zero calibration can be canceled by
pressing
. The positioner returns the AUTO
mode. ESC blinks on the display and must be
conrmed.
A new zero calibration can be started direct-
ly afterwards.
7.7 Resetting to default settings
The positioner is in closed-loop operation
after the initialization has been successfully
completed.
A reset causes an initialization to be undone
and all parameters settings are reset to the
default settings (see code list in sec-
tion11.3).