INFICON IC/5 Thin Film Deposition Controller - Manual (Page 52)

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IC/5 Operating Manual
towards zero error. This technique works well when there is little or no dead time.
If this technique is used on a process with measurable lag or dead time, then the
control loop will tend to be oscillatory due to the control loop over-compensating
the control signal before the system has a chance to respond. Auto-Control-Tune
detects the characteristics of these fast response systems during measurement of
the step response. This information is used to calculate the controller gain
coefficient for the non-PID control algorithm.