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Title: Significance Of Gauge Line Error In Orifice Measurement
Author: James W. Bowen
Source: 1995 International School of Hydrocarbon Measurement
Year Published: 1995
Abstract: Pulsation induced gauge line amplification can cause errors in the recorded differential signal used to calculate flow. Its presence may be detected using dual transmitters (one connected at the orifice taps, the other at the end of the gauge lines) and comparing the relative peak to peak amplitudes. Its affect on recorded differential may be determined by averaging both signals with a PC based data acquisition and analysis system. Remedial action is recommended in all cases where amplification is detected. Use of close connect, full opening manifolds, is suggested to decouple the gauge lines resonant frequency from that of the excitations, by positioning the recording device as close to the process signals origin as possible.

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