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Measuring Instruments and Their Properties

  • Semyon G. Rabinovich
Chapter

Abstract

Measuring instruments are the technical objects that are specially developed for the purpose of measuring specific quantities. A general property of measuring instruments is that their accuracy is known. Measuring instruments are divided into material measures, measuring transducers, indicating instruments, recording instruments, and measuring systems.

A material measure is a measuring instrument that reproduces one or more known values of a given quantity. Examples of measures are balance weights, measuring resistors, measuring capacitors, and reference materials. Single-valued measures, multiple-valued measures, and collections of measures are distinguished. Examples of multiple-valued measures are graduated rulers, measuring tapes, resistance boxes, and so on. Multiple-valued measures are further divided into those that reproduce discrete values of the corresponding quantities, such as resistance boxes, and those that continuously reproduce quantities in some range, for example, a measuring capacitor with variable capacitance. Continuous measures are usually less accurate than discrete measures.

When measures are used to perform measurements, the measurands are compared with the known quantities reproduced by the measures. The comparison is made by different methods, but so-called comparators are a specific means that are used to compare quantities. A comparator is a measuring device that makes it possible to compare similar quantities and has a known sensitivity. The simplest comparator is the standard equal-armed pan balance.

Keywords

Additional Error Primary Standard Metrological Characteristic Accuracy Class Secondary Standard 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. 1.
    International vocabulary of metrology – Basic and general concepts and associated terms (VIM), ISO/IEC Guide 99 (2007).Google Scholar
  2. 7.
    Standard Practice for the Evaluation of Single-Pan Mechanical Balances, American Society for Testing and Materials, E 319–85 (1985).Google Scholar
  3. 8.
    Publication 51, PT 1–84, Direct Acting Indicating Analogue Electrical Measuring Instruments and Their Accessories, 4th ed., Bureau Central de la Comission Electrotechnique Internationale, Geneva (1984).Google Scholar
  4. 9.
    Recommandation Internationale 34, Classes de precision des Instruments de Mesurage, Organisation International de Metrologie Legale, Paris (1974).Google Scholar
  5. 10.
    Process Instrumentation Terminology, American National Standard ANSI/ISA S51.1 (1979).Google Scholar
  6. 12.
    Metrology, Terms and Definitions, State Standard of the Soviet Union, GOST16263–70, Moscow (1970).Google Scholar
  7. 18.
    J.L. Bucher (Editor), Metrology Handbook (ASQ Quality Press, Wilwaukee, WI 2004).Google Scholar
  8. 26.
    Fluke, Calibration: Philosophy in Practice, Fluke Corporation, 2nd ed. Everett, P.O. Box 9090, WA 98206, (1994).Google Scholar
  9. 27.
    V.A. Granovskii, Dynamic Measurements, Principles of Metrological Support (Energoatomizdat, Leningrad, 1984).Google Scholar
  10. 41.
    J.G. Nee, Fundaments of tool design. 4-th ed. Society of manufacturing engineers, (1998).Google Scholar
  11. 44.
    S. Rabinovich, Measurement Errors and Uncertainties: Theory and Practice, 3rd ed (Springer, New York, 2005).MATHGoogle Scholar
  12. 47.
    S.G. Rabinovich and T.L. Yakovleva, “Analysis of the temporal stability of the distributions of the errors of measuring instruments,” Metrologia (Supplement to Izmeritel’naya Technika) 7, 8–15 (1977).Google Scholar
  13. 54.
    T.L. Yakovleva, “About statistical homogeneity of the samples of measuring instrument errors,” Metrologiya (Supplement to Izmeritel’naya Technika1) 2, 19–23 (1979).Google Scholar

Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  1. 1.Basking RidgeUSA

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