Sub - Substitute Calibration - Samson 3730-2 Mounting And Operating Instructions

Select the initialization mode:
Turn  Code 6
Press , Code 6 blinks.
Turn  MAN
Press to confirm the MAN as the initial-
ization mode.
Enter OPEN position:
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 confirm the OPEN position.
Start initialization:
Î Press INIT key.
EB 8384-2 EN
Init mode
Default MAX
Manual set point
(current angle of rotation is
indicated)
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 fixed
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 configuration.
NOTICE
!
Perform a reset before re-initializing the po-
sitioner if the substitute positioner has al-
ready been initialized. Refer to section 7.8.
Enable configuration:
Note
If no settings are entered within 120 sec-
onds, the enabled configuration function be-
comes invalid.
Start-up and settings
71