proving ring

proving ring

[′prüv·iŋ ‚riŋ]
(design engineering)
A ring used for calibrating test machines; the diameter of the ring changes when a force is applied along a diameter.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Typical examples are mechanical systems, such as the micrometer screw and precisely machined contact points that are integrated within proving ring transducers, and electrical voltage-ratio measuring instruments supplied by customers for connection to strain gauge load cells.
Uncertainty in NIST force measurements
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