Yokogawa YVP20S - Manual (Page 102)

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<Toc> <Ind> <10. CALIBRATION SERVICES>
IM 21B04C50-01E
10.2 Calibration - Tuning
Figure 10.5 Tuning
This tab allows the user to automatically tune the positioner’s control alogorithm and exam-
ine the positioner servo parameters. The parameters display provides two views for com-
parison, the left half displays the original set before performing autotune, the right half will
be updated after the auto tuning. The parameters can be manually modified here as well.
To see the description of the parameters, refer to the Position setup page.
WARNING
Before beginning the Autotune procedure, confirm that the valve is isolated from the pro-
cess. This procedure exhausts the valve actuator to atmosphere and then fills the valve
actuator to supply pressure and therefore strokes the valve over its full range. Keep clear of
moving valve and actuator parts.