Automation System
What is offset error?

the difference between the controller output and the setting of the manipulated variable.
the difference between the control setpoint value and the actual value.
All of these
the difference between the sensor input and the absolute sensed parameter.
None of these

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Automation System
The computer graphics system called SKETCHPAD was demonstrated at

Imperial college of Science and Technology, London, 1973
University of Aston, Birmingham, 1960
Cranfield Institute of Technology, London, 1962
Massachusetts Institute of Technology in 1963
None of these

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