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Title: Wide Range And High Accuracy Measurements For Orifice Metering Using Microcomputers
Author: Edgar E. Buxton
Source: 1982 Appalachian Gas Measurement Short Course
Year Published: 1982
Abstract: New software packages for microcomputers offer measurement accuracy improvements and a reduction in calibration manpower. When combined with Auto- Zero hardware these microcomputer systems also offer reduction in measurement errors due to transmitter zero shift. Signal amplification is used to reduce readout error at low differential pressures providing an analog to digital resolution ottO.006 inches (less than 1%of reading at 1 inch differential from a 100 inch span transmitter). Profiling provides for accurate instrument calibration and linearization with a minimum of user effort. These features are expected to enable one differential pressure transmitter without a temperature controlled enclosure to provide more accurate flow measurement results than the current system designs using two transmitters in a temperature controlled enclosure.

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