Automation System
A semi-continuous operation means:

the operation is continuous each shift, but stops between shifts
each operation in a sequence is continuous, but subsequent operations in the sequence may be different.
coffee breaks are allowed for the operator
a computer is a required part of the machine
None of these

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Automation System
What is offset error?

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

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