| 摘要 |
A method includes collecting (804) a set of process variable (PV) measurements generated using a sensor (108, 204, 306, 402, 500). The sensor is fluidly coupled to one or more impulse lines (110-112, 206, 310). The method also includes determining (806) a median fluctuation in the set of PV measurements and determining (1002) a ratio using the median fluctuation and a reference median fluctuation. The method further includes determining (808) whether at least one of the one or more impulse lines is plugged using the ratio. Determining whether at least one impulse line is plugged could include determining (1004) whether the ratio is below a threshold and, if so, determining (1006) that multiple impulse lines are plugged. Determining whether at least one impulse line is plugged could also include determining (1008-1010) whether the ratio is above a first threshold or between second and third thresholds and, if so, determining (1012) that a single impulse line is plugged. |
