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Definition
| Quantities that are measured and controlled to ensure that the final product meets the highest quality. |
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Term
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Definition
| The variable that must be controlled for proper operation of the process. |
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Definition
| The variable that is measured to maintain proper operation of the process |
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Definition
| The variable that is adjusted to maintain proper operation of the process. Acts to maintain controlled variable to set point. |
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Definition
| The desired value for proper operation of the process. |
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Definition
| The difference between the actual value and the set point. |
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Definition
| A change in the demand on the system. Usually a factor outside the control loop that affects the controlled variable. |
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Definition
| The continuous measurement and response to the information. |
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Term
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Definition
| The term used to define the instruments in a control system that gathers information, makes a decision, and takes an action. |
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Term
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Definition
| Detect the value for the measured variable. |
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Term
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Definition
| Sometimes referred to as a transducer, converts the signal from the sensor to an instrument signal and sends it to the controller. |
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Definition
| The brains of the operation (usually a PLC or Computer). Recieves the instrument signal from the transmitter and compares it to set point and sends a signal to the final control element so it can be re-positioned to adjust controlled variable back to set point. |
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Term
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Definition
| The device that is adjusted to change the manipulated variable. Pumps, valves, and dampers are examples. |
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Term
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Definition
| The amount of time that a sensor takes to respond to a change in a measured variable. |
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