What is Split Range Control?

• A. A method for measuring flow velocity
• B. A device that automatically cleans sensors
• C. The output of a controller is split between two or more final control elements
• D. A way to log data on two channels

Answer: (C)

Split Range Control is when a single controller output is divided and sent to two or more final control elements, so each element handles a portion of the overall control task. This lets one control signal drive multiple actuators or devices that together shape the process, such as two valves or dampers sharing the load or covering different parts of the control range. For example, the controller output could map 0–50% to valve A and 50–100% to valve B, or have both move in a coordinated way to achieve the desired effect across a wider range than a single device could handle. This approach expands control capability and can improve responsiveness or accuracy when a single actuator isn’t sufficient.

This isn’t about measuring flow velocity, automatically cleaning sensors, or logging data on two channels, so those options describe different functions rather than how a controller’s signal is distributed.