Automation System
How is the integral mode implemented on a digital controller?

the error is divided into discrete amounts
None of these
the digital controller cannot handle integral mode
the error signal is summed over a discrete time interval and accumulated by the controller
All of these

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Automation System
Ergonomics refers to:

the cost relationship of the workstation versus productivity
None of these
the technology involved in the workstation itself
the level of involvement the operator has with the workstation
the human aspect of the environment around the workstation as well as the workstation itself

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Automation System
What is the process lag?

The time it takes for the sensor to respond to a changed.
All of these
The lag in the error signal when the setpoint is changed.
None of these
The time it takes for the mass of the process to respond to an input change.

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