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Title: Manufacturers Calibration Procedures For Turbine Meters
Author: Raymond Teyssandier
Source: 1982 Appalachian Gas Measurement Short Course
Year Published: 1982
Abstract: Unlike the orifice meter, which has a meter coefficient established by dimensional checks, gas turbine meters require calibrations to determine their meter factor. Each gas turbine meter must be calibrated before leaving thefactory not only to establish its meterfactor but also to check whether or not it meets both the catalog specified values of linearity and repeatability over the range of flows. Why this must be done cannot be answered in an easy or simple fashion since turbine meters do not lend themselves to simple two dimentional fluid dynamic analysis (the problem is three dimensional). Furthermore, one must additionally factor in the fluid dynamic/mechanical interaction of the bearings (and in non-electrical metersthecounterdrivetrain). Rather than attempt to try to explain the why of calibrations this paper will consider how factory calibrations are conducted.

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