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The NIST microforce realization and measurement project

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5 Author(s)
D. B. Newell ; U.S. Dept. of Commerce, Nat. Inst. of Stand. & Technol., Gaithersburg, MD, USA ; J. A. Kramar ; J. R. Pratt ; D. T. Smith
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The National Institute of Standards and Technology (NIST) has launched a five-year Microforce Realization and Measurement Project focusing on the development of an instrument and laboratory capable of realizing and measuring the SI unit of force below 5×10-6 N using the electrical units as the link to the International System of Units (SI). As a proof of principle, a prototype electromechanical balance has been developed to allow comparisons between mechanically and electrically derived forces up to 300 μN with a resolution of 15 nN. Results from force comparisons using 1-, 10-, and 20-mg deadweights are presented.

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IEEE Transactions on Instrumentation and Measurement  (Volume:52 ,  Issue: 2 )