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Title: Transferring Audc Differen Crs From NIST At 5 Ppm To Product At 10 Ppm
Author: Bud Stott
Source: 1995 Measurement Science Conference
Year Published: 1995
Abstract: The Fluke 792A AC/DC Transfer Standard was developed to support the 5790A AC Measurement Standard and the 5700A Calibrator. This support made it necessary to provide specifications for the 792A with uncertainties as small as 10 ppm for AC/DC differences. At these points it was possible to get NIST characterizations with uncertainties of 5 ppm. The manufacturer must transfer this characterization to working standards in the Primary Standards Laboratory, then to standards for use in the factory, and finally, to the product. This paper describes the measurement methods, software, and uncertainty analysis which enables the manufacturer to specify 10 ppm uncertainty for a product while obtaining 5 ppm uncertainty from NIST.

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