Span is best defined as:
A) The portion of the process controlled by the controller.
B) The difference between the upper and lower range limits.
C) Electrical frequency used by a controller.
D) Pneumatic pulse used to detect differences in process variables.

Question

Quizplus · Accepted Answer

Span in the context of process control and instrumentation refers to the difference between the upper and lower limits of a range, such as temperature, pressure, or flow rate, that a sensor, instrument, or controller can accurately measure or control.

Span Is Best Defined As