Process Controls
PROPORTIONAL CONTROL SYSTEMS
Summary
The important information in this chapter is summarized below.
Proportional Control Summary
In the proportional control mode, the final control element is throttled to various
positions that are dependent on the process system conditions.
With proportional control, the output has a linear relationship with the input.
The proportional band is the change in input required to produce a full range of
change in the output due to the proportional control action.
The controlled variable is maintained within a specified band of control points
around a setpoint.
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