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Article: Uncertainties of measuring systems.(Part 3 Of A 3-Part Series)
- Article from:
- Pipeline & Gas Journal
- Article date:
- July 1, 2007
- Author:
CopyrightCOPYRIGHT 2007 Oildom Publishing Company of Texas, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Measuring systems include several measuring instruments. The uncertainty of a measuring system includes uncertainties of its measuring instruments. Based on previously stated uncertainties of measuring instruments, we are able to evaluate uncertainties of different measuring systems encountered in the gas industry.
Measurement Of Corrected Volume
The measurement equation for corrected volume:
[V.sub.c] [V.sub.m] [Z.sub.s]/[Z.sub.m] [P.sub.m]/[P.sub.s] [T.sub.s]/[T.sub.m] [V.sub.m] [F.sup.2.sub.pv] [P.sub.m]/[P.sub.s] [T.sub.s]/[T.sub.m] (25)
where
[V.sub.c] Corrected volume or volume at standard conditions;
[V.sub.m] ...