MKS T3PIA, Инструкция по эксплуатации, Страница: 37 / 70

Control Mode Chapter Three: Product Overview
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Gain
The gain provides a control signal that is proportional to the error signal. The gain allows the controller to
track the setpoint with minimal steady state error. The highest possible gain setting produces the best pressure
control. A high gain setting generally results in a faster response to setpoint, and the best rejection of
disturbances such as changes in flow rate or noise in the system. However, if the gain is too large, the
pressure will overshoot the setpoint before settling in (refer to Figure 9). If the gain is too small, the pressure
will respond slowly to a setpoint change (refer to Figure 10) or a change in flow rate.
Pre
ss
u
re
Time
Set Point
Figure 9: Gain Set Too High
Pre
s
su
re
Set Point
Time
Figure 10: Gain Set Too Low