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  • Calibration of electronic levels using a special sine bar
    Ačko, Bojan, 1961-
    Electronic levels are designated for the precise measurement of inclination angles within the range of +- 3 mm/m. They are very often used for checking the straightness of machine tool guides as well ... as the flatness of different kindsof machine tool tables and surface plates. Typical resolution of such instruments is 1 m/m. Electronic levels are calibrated by using very precise angle generators. One such generator is a sine bar. Sine bars are cheap and enable fast and simple calibrations. Commercial sine bars however are not precise enough. We, therefore, decided to design a special sine bar, which would be able to generate angles within an uncertainty of 1 mžm. This sine barwas designed by the laboratory staff and manufactured in our workroom. We have also created a calibration procedure, which has already been accredited. Uncertainty analysis, including experimental measurements, shows that the planned uncertainty has been reached. The sine bar design, calibration procedure and uncertainty evaluation are presented in this article.
    Source: Precision engineering : journal of the International Societies for Precision Engineering and Nanotechnology. - ISSN 0141-6359 (Vol. 29, iss. 1, 2005, str. 48-55)
    Type of material - article, component part
    Publish date - 2005
    Language - english
    COBISS.SI-ID - 9203478

    Link(s):

    http://dx.doi.org/10.1016/j.precisioneng.2004.04.004
    Digital Library of the University of Maribor – DLUM

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