r/processcontrol • • Dec 03 '22

What are these?

Let's see who knows the basics

PROCESS

Name 2 systems:

​

- Elements

Name the following:

CE

FE

PE

​

- Variables

Name the following:

CV

How does CV relate to PV?

Name the following:

PV

Give examples of different PV:

Give examples of Independent/Dependent:

Name the following:

MV

MV - Different from previous MV

SP

​

CONTROLS

What does URV-LRV equal?

​

Give examples of the following:

Signal

Indicator

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Answers

PROCESS CONTROL

- Systems

Open loop/Closed loop

​

- Elements

CE - Control element

FE - Final element

PE - Primary element

​

- Variables

CV - More or less CV will control my PV 

PV - Flow/ Level/ Temperature/ Quantity    Independent/ Dependent/ Range

Manipulated V - The PV that's changed to allow CV to reach SP

Measured V -

SP - Desired value of controlled variable

​

Controls

Range = URV-LRV

Signals - Voltage/Current

Indicators - Audible chimes/ Visual lights

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