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Title: Gauge interferometry-sans the use of expansion coefficient
Authors: Karfa, Mrityunjay
Issue Date: Mar-2002
Publisher: NISCAIR-CSIR, India
Abstract: In interferometric calibration of slip gauges, the temperature correction, the most dominant correction embraces two important parameters-one being the temperature itself and the other the coefficient of linear expansion α. In normal practice, for "00" grade slip gauge calibration, a values for all the individual slip gauges within the same set are assumed to be identical and unique which in fact is not true and naturally the follow up action based on this assumption will be error -inviting and accuracy of the calibration work will be the prime casualty. The best way to overcome this problem is to use the technique in such a way that the effect of α, the expansion coefficient, is nullified or neutralised. An approach based on graphical extrapolation technique has been suggested which not only eliminates the problem of using the value of a that one is apprehensive about, but also provides, as a by-product, a method to find the value of a for each and every individual slip gauge in conformity with the assumption that the a-values of individual slip gauges need not always he identical amongst themselves.
Page(s): 196-201
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.40(03) [March 2002]

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