Operations troubleshooting - faulty instrumentation
Operations troubleshooting - faulty instrumentation
What are the operations best practices to distinguish between instrumentation issues and actual process instability during live troubleshooting?
Re: Operations troubleshooting - faulty instrumentation
Here is where redundancy comes into play. Then adjust the process variables and see if there are changes.
If one measurement is not right, it is probably the instrument fault.
If it is a process problem, it has to be consistent, repeating. Instrument problem will be illogical, you can't get any physics out there.
Check for the correlations, apply them. Like the control actions, if PV changes but OP is steady then suspect instrument; if OP is hunting and PV follows, likely real loop/process instability.
Best practices here is the training itself, competency, knowing about process upsets, learning from the past, and then handling them in real situation.
If one measurement is not right, it is probably the instrument fault.
If it is a process problem, it has to be consistent, repeating. Instrument problem will be illogical, you can't get any physics out there.
Check for the correlations, apply them. Like the control actions, if PV changes but OP is steady then suspect instrument; if OP is hunting and PV follows, likely real loop/process instability.
Best practices here is the training itself, competency, knowing about process upsets, learning from the past, and then handling them in real situation.