What occurs when you decrease the percentage of proportional band on a receiver controller?

Decreasing the percentage of proportional band on a receiver controller leads to an increase in sensitivity to changes in the measured variable. A smaller proportional band means that the controller is more responsive and will react to smaller deviations from the set point more aggressively. This translates directly into a greater output change, measured in terms of psig (pounds per square inch) or degrees Fahrenheit, for a given change in the input signal.

When the proportional band is reduced, the controller's output will adjust more significantly for even small deviations, resulting in a higher output in response to the same fluctuations, which is especially crucial in maintaining precise control in systems where stability and accuracy are required.

The other options are less relevant in this context. Sensitivity is increased, not decreased; stabilization is not guaranteed as the system may become more reactive; and while interrupting the control action might occur in certain fault conditions, it does not directly relate to the proportional band adjustment.