chp20 - Metrology The science of measurements Principles of...

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Principles of Metrology FScN 4131 Food Quality December 1st., 2000 Metrology • The science of measurements • Studies the representation of measuring units, standards and measuring devices • Deals with quantitative (variable) not qualitative (attributes) information Typical Measurements in Food Quality •S i z e •W e i g h t •T im e •M a s s •T em p e r a t u r e • Light •D e n s i t y • Current • Viscosity • Pressure •V o l um e • Concentration • Rate •E t c . Metrology: Definitions Quantity: attribute of a phenomenon or a substance that is likely to be qualitatively and quantitatively determined Value of a particular quantity:
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Metrology: Measurement Measuring Method: part of the measuring technique that provides comparison means used in measurement Measuring Procedure: the succession of operations necessary to carry out a measurement Measurement error: difference between the measured value and the true value of the quality Measurement Units: First component of Metrology Meter evolution: 1790 - 1/10,000,000 of the distance pole equator
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This note was uploaded on 01/06/2011 for the course FDE 510 taught by Professor Prof.hamialpas during the Spring '09 term at Middle East Technical University.

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chp20 - Metrology The science of measurements Principles of...

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