Asked by Gustavo Perez-Ramirez on Jul 22, 2024
Verified
With an on/off controller:
A) the output is either completely on or completely off.
B) a positive deviation of the process variable from its set point causes the controller to shut the control element off.
C) a negative deviation of the process variable from its set point causes the controller to turn the control element on.
D) all of these.
On/Off Controller
A simple control mechanism that switches a device or system between two states: on and off.
Process Variable
A measurable quantity representing a condition essential to a process, such as temperature, pressure, or flow rate, monitored to control or optimize the process.
Control Element
A component used in control systems to modify or manage the control process, such as a valve or switch.
- Acquire knowledge on the operations of different controller strategies (PID, on/off, proportional, derivative, integral).
Verified Answer
MC
Merardo CebrerosJul 27, 2024
Final Answer :
D
Explanation :
An on/off controller operates by turning the control element (for example, a valve) completely on or completely off in response to the process variable exceeding or falling below the set point. Thus, the output is either completely on or completely off (A). When the process variable deviates positively from its set point, the controller shuts off the control element (B), and when the process variable deviates negatively from its set point, the controller turns the control element on (C). Therefore, all of these statements are correct (D).
Learning Objectives
- Acquire knowledge on the operations of different controller strategies (PID, on/off, proportional, derivative, integral).