Impulse line blockage detector systems and methods

Details Impulse line blockage detector systems and methods Impulse line blockage detector systems and methods

1996-06-21

1997-10-21

Hofsass, Jeffery

Communications: electrical

Condition responsive indicating system

Specific condition

340611, 340626, 73 4R, 137557, G08B 2100

Patent

active

056801092

ABSTRACT:
A differential pressure sensor is attached to a process via a high and a low pressure impulse line. An absolute pressure sensor is also attached to each impulse line. To determine if an impulse line is blocked, a noise signal is acquired from the corresponding absolute pressure sensor. A variance of the noise signal is determined and compared to a threshold. If the variance is less than the threshold, an impulse line blockage is indicated.

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