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Calibration, handling repeatability, and the Maximum Permissible Error of single-volume glass instruments

Meyer, Veronika ; Pfohl, Josef ; Winter, Burkhard

In: Accreditation and Quality Assurance, 2010, vol. 15, no. 12, p. 705-708

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    Titre
    • Calibration, handling repeatability, and the Maximum Permissible Error of single-volume glass instruments
    Auteur
    • Meyer, Veronika. EMPA, Swiss Federal Laboratories for Materials Science and Technology, Lerchenfeldstrasse 5, 9014, St. Gallen, Switzerland
    • Pfohl, Josef. Brand GmbH, Postfach 1155, 97861, Wertheim, Germany
    • Winter, Burkhard. DIN Normenausschuss Labor, Theodor-Heuss-Allee 25, 60486, Frankfurt am Main, Germany
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Accreditation and Quality Assurance, 2010, vol. 15, no. 12, p. 705-708. Springer-Verlag
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:317880
    Summary
    The influence quantities for the uncertainty of a volumetric operation with glass instruments are calibration, repeatability and temperature. In the literature, measurement uncertainty budgets can be found, which count all three quantities separately although calibration and repeatability are merged in tabulated data to the Maximum Permissible Error. We propose that this error should be handled as a rectangular distribution in order to get a standard uncertainty. For the daily use in an analytical laboratory, the combined standard uncertainty of a volumetric operation is thus calculated from the Maximum Permissible Error plus the uncertainty of the temperature influence