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| a device having an output that changes to regulate a controlled variable in a specific manner. |
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| a system in which deliberate guidance or manipulation is used to achieve a predescribed value of a variable. |
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| the desired value where the process should be maintained. |
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| any process whereby an instrument measures a factor(solution temperature) and those data are manipulated by a control device, which sends corrective data to a final control elemenet to appropriately adjust the factor: the process automatically repeats. |
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| information in the form of a pneumatic pressure, and electric current, or mechanical position that carries information from one control loop component to another. |
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| collection of programs and routines associated with a computer |
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| conponent of a control system(valve) that directly regulates the flow of energy or material to the process. |
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| any function or operation used in the treatment of a material |
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| thermal energy expressed in units of calories, or british thermal units (btu) |
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| any variable property of a process: the part of the process that changes and therefore needs to be controlled. |
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| the speed or velocity of fluid movement |
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| a device or combination of devices that measures the value of the variable, quantity, or condition and operates to correct or limit deviation of this measured vale fom a selected reference. |
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| a detailed set of instructions executed by the cental processing unit(cpu), which is the portion of a computer that decodes the instructions, performs the computations, and keeps order in the execution of programs |
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| elements in a control system that contribute to the required corrective action |
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| a continuous operation signal |
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| a control signal that is on or off / can refer to a instrument located by itself |
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| a term applied to a signal or device that used binary digits to represent continuous valued or discrete states |
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| part of a loop or instrument that first senses the value of the process variable, also known as a detector or primary element |
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| process of adjusting an instrument or compiling a deviation chart so that its reading can be correlated to the actual value being measured |
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| an operable arrangement of one or more automatic controllers along with their associated equipment connected in closed loops with one or more processes. |
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| observation of process variables for informational purposes only |
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| component of a control system(magnetic line starter) that directly regulates the flow of energy to a device in direct contact with a process material(hydraulic pump) |
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| a term used broadly to describe any device that performs a measuring or controlling function |
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| sequence of letters or digits or both, used to designate an individual instrument or loop |
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| that part of a loop or instrument that first senses the value of process variable. the sensor is also known as a detector or sensor |
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| a character set that contains both letters and digits |
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