Instrument deviation issue
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For many instruments connected to PID controllers, in addition to high and low value alarms, there are also deviation alarms. How should this be understood? I seek guidance from experts and more insights
Is the poster asking about a temperature controller?
It means that the actual value of the set parameter differs too much from the set value, indicating a problem with the control loop. It could be a problem with the instruments, such as a failed control valve or a malfunctioning measuring instrument, to assist operators in assessing the operation of the process.
As I understand it, over-reporting and under-reporting refer to safety alarms, while deviation alarms are control alarms. The nature of the alarms is different.
As I understand it, the fourth floor is the same. That’s probably how it is.
There is a liquid level sensor as well, an operator as well, and a thermometer as well
The key is that it’s not about control; it’s just a single gauge that displays the information