CONTROLLERS
Process Controls
Figure 32 Typical Control Station
The setpoint indicator, located in the center of the upper half of the controller, indicates
the setpoint (desired value) selected for the controller. The scale may be marked 0% to
100% or correspond directly to the controlled variable (e.g., 0 - 1000 psig or -20°F to
+180°F).
The setpoint adjustment, located right of the setpoint indicator, is a thumbwheel type
adjustment dial that allows the operator to select the setpoint value. By rotating the
thumbwheel, the scale moves under the setpoint index line.
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