SMAR fy303, Operation, Maintenance & Instruction Manual

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FY303 – Operation, Maintenance and Instructions Manual
3.34
Self-Calibration using Local Adjustment
This process is necessary to find the position values at which the valve is considered fully open or
close. This operation can be done using the
Configuration Tool or the Local Adjustment. The
FY303 automatically finds the fully open and closed positions of a valve, but the user may also set a
narrower range of operation should he like to. Before making the Auto-Setup, select the type of
valve through the parameter VALVE_TYPE choosing between "Linear or Rotary" options.
The setup operation can be started writing "Enable" (2) on the parameter SETUP, so the positioner
will execute immediately the operation of auto-setup for approximately 2 to 5 minutes depending on
the type of valve, other configured parameters and function blocks used in the positioner.
The process will be finished when the SETUP parameter will indicate "Disable" (0) automatically
during the operation of reading.
NOTE
This operation should be performed off-line or with the process shut down to be sure that the plant operation
is not disturbed, due the valve will be moved between the fully open and close points in order to reach the
better adjustment.
NOTE
In case of oscillation, decrease the gain of valve, acting on the SERVO GAIN parameter.
If the valve could be out-of-control after its operation, please, repeat the Self-Calibration operation again.
Hall's Offset Compensation without Magnet Part
Before installing the magnet to the positioner, write "Enable" on the menu Factory Hall Offset at
Device menu and wait until the configuration tool set it back to "Disable" indicating end of its process
of Hall's Offset compensation.
Figure 3.31 - Enabling the Hall's Offset Compensation
Figure 3.32 - Disabling the Hall's Offset Compensation