When the pressure gauge data is abnormal, it should be tested and diagnosed according to the physical state of the measured medium – solid, liquid, gas – in a targeted manner
(1) When abnormal fluctuations occur in the pressure control instrument, the changes in the process operation should be confirmed first, because such changes are mostly caused by abnormal process operation and PID parameters.
(2) When the control instrument stagnates, i.e., the instrument data remains constant despite the change of process operation, it is usually due to the failure of the pressure measurement system, which should first confirm whether there is any blockage in the induced pressure conduit, if the pipeline is clear, then confirm whether the pressure transmission output device is in normal condition if abnormal changes are found, the problem can be confirmed in the measurement indication system.