SELF-DIAGNOSING DIFFERENTIAL PRESSURE FLOW METER

摘要

An aspect provides a method of metering flow through a fluid conduit having an obstruction therein, including: placing an obstruction body within the conduit; generating at least two differential pressure measurement signals using at least three different pressure ports, said at least three different pressure ports comprising: an upstream pressure port; a downstream pressure port; and an auxiliary pressure port; wherein at least one of the upstream pressure port, the downstream pressure port, and the auxiliary pressure port is positioned at an angle between 0 and 90 degrees with respect to a conduit wall; establishing a baseline relationship between the at least two differential pressure measurement signals; and determining if the baseline relationship between the at least two differential pressure measurement signals differs by a predetermined amount. Other aspects are described and claimed.

主权项

1. A method of metering flow through a fluid conduit, comprising:
generating at least a primary differential pressure measurement signal and an auxiliary differential pressure measurement signal using at least three different pressure ports, said at least three different pressure ports comprising: a pressure port providing a high pressure signal; a pressure port providing a low pressure signal; and an auxiliary pressure port providing an auxiliary pressure signal and positioned at an angle between 0 and 90 degrees with respect to a wall of the fluid conduit; establishing a baseline relationship between the primary differential pressure measurement signal and the auxiliary differential pressure measurement signal; and determining a second baseline relationship between the primary differential pressure measurement signal and the auxiliary, differential pressure measurement signal.