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Article: A primary dead-weight tester for pressures (0.05-1.0) MPa.
- Article from:
- Journal of Research of the National Institute of Standards and Technology
- Article date:
- March 1, 2003
- Author:
CopyrightCOPYRIGHT 2003 National Institute of Standards and Technology. 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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Recent advances in technology on two fronts, 1) the fabrication of large-diameter pistons and cylinders with good geometry, and 2) the ability to measure the dimensions of these components with high accuracy, have allowed dead-weight testers at the National Institute of Standards and Technology (NIST) to generate pressures that approach total relative uncertainties previously obtained only by manometers. This paper describes a 35 mm diameter piston/cylinder assembly (known within NIST as PG-39) that serves as a pressure standard in which both the piston and the cylinder have been accurately dimensioned by Physikalisch Technisehe Bundesanstalt (PTB). Both artifacts (piston ...
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