Samson 3730-4 - Sub - Substitute Calibration

70 EB 8384-4 EN
Start-up and settings
Select the initialization mode:
Init mode
Default MAX
Turn  Code 6
Press
, Code 6 blinks.
Turn
 MAN
Press
to conrm the MAN as the initial-
ization mode.
Enter OPEN position:
Manual set point
(current angle of rotation is
indicated)
Turn  Code 0
Press
, Code 0 blinks.
Turn
 MAN
Press
.
Turn
 Code 1
Press
, Code 1 blinks.
Turn
until the valve reaches its OPEN po-
sition.
Press to conrm the OPEN position.
Start initialization:
Î Press INIT key.
7.6.4 SUb – Substitute calibra-
tion
A complete initialization procedure takes
several minutes and requires the valve to
move through its entire travel range several
times. In the SUb initialization mode, the
control parameters are estimated and not
determined by an initialization procedure.
As a result, a high level of accuracy cannot
be expected. A different initialization mode
should be selected if the plant allows it.
The substitute calibration is used to replace a
positioner while the process is running. For
this purpose, the control valve is usually xed
mechanically in a certain position, or pneu-
matically by means of a pressure signal
which is routed to the actuator externally.
The blocking position ensures that the plant
continues to operate with this valve position.
By entering the blocking position (Code 35),
closing direction (Code 34), pin position
(Code 4), nominal range (Code 5) and di-
rection of action (Code 7), the positioner can
calculate the positioner conguration.
Perform a reset before re-initializing the po-
sitioner if the substitute positioner has al-
ready been initialized. Refer to section7.8.
Enable conguration:
If no settings are entered within 120 sec-
onds, the enabled conguration function be-
comes invalid.
NOTICE
!
Note