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Title: New Methods In Differential Testing - Rotary Meters
Author: Phil Whittemore
Source: American Gas Association 2004
Year Published: 2004
Abstract: Most everyone has a basic understanding of what a Differential Rate Test is and how to perform it. What I will cover in this paper is an overview of this test method that is unique to rotary meters. A portion of the specifics will be covered in the first two pages, followed by the main title of this paper - New Methods In Differential Testing. I will then return to more details about performing a Differential Rate Test and how to use the data to make a decision on the maintenance requirement for the subject meter that has been tested. A Differential Rate Test is an accurate and convenient method of comparing a meters performance to previous or original performance records. It is widely recognized that many State Utility Commissions or other regulator agencies accept it as a means of periodically substantiating that the original accuracy of a meter has remained unchanged.

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