Match the following process control terms with their correct definition.
Term | Definition |
Proportional gain | a. A condition that exists when a control loop is improperly designed, installed, or calibrated, or when the controller itself is not properly aligned. This condition will be observed by the process technician as a random behavior or cycling above and/or below the setpoint (desired control point). |
Windup | b. A trend condition in which the process is in equilibrium and running smoothly producing a relatively straight line. |
Offset | c. The amount of deviation of the controlled variable from the setpoint required to move the controller’s output through its entire range (expressed as 10 percent of span). |
Tuning | d. A plot of a process variable over time. |
Trend | e. The difference between the setpoint and the controlled variable under steady state (not changing) conditions. |
Hunting | f. Setting the controller’s parameters of gain, reset, and rate (PID) lo optimize the control of the process variable. |
Steady state | g. The saturation of the controller output signal to its minimum or maximum value if the process variable does not return to the setpoint. |
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