Valve positioner system

摘要

The invention relates to a self-adjusting method for positioning a valve comprising: Finding a BIAS current to the (I/P) transducer; performing an open-loop test on the valve by using the found BIAS current for obtaining a system characteristic and a control parameter; and tuning the control parameter to achieve an improved dynamic response of the valve. A self-adjusting positioner is provided for performing said method. <IMAGE>