Measurement: it is the act or the result of a quantitative comparison between a pre-determined standard and an unknown magnitude.
The procedure and apparatus employed for obtaining the comparison must be prove-able the procedure for this is called calibration.
Measurand: The physical quantity or the characteristic condition which is the object of measurement in an instrument in an instrumentation system and it is variously termed as measurand or measurement variable or instrumentation variable or process variable. The measurand may be fundamental or derived quantity.
Fundamental quantity: It is the physical quantity which independent of any other quantities
Derived quantity: It is the physical quantity which is derived from the fundamental quantity.
Eg. speed velocity acceleration.
Instrumentation: The technology of using instruments to measure and control the physical and chemical properties of material is called instrumentation.
Basic representation of measurement system
Input signal===>measurement system===>output signal
Input to the measuring system is known as measurand ,output is called measurement
The procedure and apparatus employed for obtaining the comparison must be prove-able the procedure for this is called calibration.
Measurand: The physical quantity or the characteristic condition which is the object of measurement in an instrument in an instrumentation system and it is variously termed as measurand or measurement variable or instrumentation variable or process variable. The measurand may be fundamental or derived quantity.
Fundamental quantity: It is the physical quantity which independent of any other quantities
Derived quantity: It is the physical quantity which is derived from the fundamental quantity.
Eg. speed velocity acceleration.
Instrumentation: The technology of using instruments to measure and control the physical and chemical properties of material is called instrumentation.
Basic representation of measurement system
Input signal===>measurement system===>output signal
Input to the measuring system is known as measurand ,output is called measurement
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