Achha, process dynamics is like watching the refinery’s big columns—how they breathe and change when we adjust a valve. PID tuning is learning to calm that breath, bit by bit. You learn it not from books first, but by standing with an old technician, watching his hands on the controller while the heat settles. I say this because I once read all the manuals, but it was Dinesh-bhai who showed me how to listen to the hiss of a steam line to know if my tuning was truly achha.
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