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Title: Efc Calibration: How Much Effort Is Required To Stay Accurate?
Author: David J. Firth
Source: 2004 Appalachian Gas Measurement Short Course
Year Published: 2004
Abstract: Calibration is the process of aligning the performance of an instruments measurement with the performance of a known, traceable, measurement standard. Checking and maintaining calibration for an Electronic Flow Corrector (EFC) must be done periodically in order to document the accuracy of the device in custody transfer applications. An age-old measurement question is: How often do we need to calibrate devices in order to maintain accurate measurement? Recent additional questions are: Is this calibration schedule cost-effective? Can we calibrate less often and save money while providing accurate measurement? In recent years, corporate reorganizations and staff reductions have placed focus upon more efficient use of resources. New M&R management structures staffed by persons with experience in budgets, efficiency, and productivity have moved many of NiSource Energy Distributions EFCs to annual calibration schedules justi- fied by informal internal studies and EFC manufacturer recommendations. There is little worry within the firm that the move to longer calibration schedules jeopardizes good measurement. EFCs are stable devices with good calibration performance.

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