understand the control valve calibration.
As in positioner calibration, a pressure signal is applied to the actuator and the resulting valve position is recorded. This may be carried out with the positioner calibration, if applicable. It may also be performed in conjunction of I/P calibration as described.
Just remember to make sure the system is in safe condition if performing the calibration in the field. Also remember that you need to know the correct action, direct or reverse, and fail position before starting on the Control Valve.
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