Methodical instructions for laboratory classes in the discipline "Interchangeability, standardization and technical measurements"

Abstract

Metrology is a science of measurement. Metrology may be divided depending upon the quantity under consideration into: metrology of length, metrology of time etc. Depending upon the field of application it is divided into industrial metrology, medical metrology etc. Engineering metrology is restricted to the measurement of length, angles and other – quantities which are expressed in linear or angular terms. For every kind of quantity measured, there must be a unit to measure it. This will enable – the quantity to be measured in number of that unit. Further, in order that this unit is followed by all; there must be a universal standard and the various units for various parameters of importance must be standardized. It is also necessary to see whether the result is given with sufficient correctness and – accuracy for a particular need or not. This will depend on the method of measurement, measuring devices used etc.