Electrical and Instrumentation Engineering: Unit IV: Measurements and Instrumentation
Introduction of Measurement
Electrical energy is being used in the manufacture of many commodities. In order to ensure quality and efficiency, it is important that we should be able to measure accurately the electrical quantities involved.
INTRODUCTION OF MEASUREMENT
Electrical
energy is being used in the manufacture of many commodities. In order to ensure
quality and efficiency, it is important that we should be able to measure
accurately the electrical quantities involved. The instruments used to measure
electrical quantities (e.g. current, voltage, power, energy etc.) are called
electrical instruments. These instruments are generally named after the
electrical quantity to be measured. Thus the instruments which measure current,
voltage, power and energy are called ammeter, voltmeter, and wattmeter and
energy meter respectively.
The
accuracy, convenience and reliability of electrical instruments are mainly
responsible for the widespread use of electrical methods of measurements.
Basic
requirements for a meaningful measurement
The
standard used for comparison purposes must be accurately defined and should be
commonly accepted. The apparatus used and the method adopted must be provable
(verifiable).
Significance
of Measurement
Importance
of Measurement is simply and eloquently expressed in the following statement of
famous physicist Lord Kelvin: "often say that when you can measure what
you are speaking about and can express it in numbers, you know something about
it; when you cannot express in it numbers your knowledge is of meager and
unsatisfactory kind"
Electrical and Instrumentation Engineering: Unit IV: Measurements and Instrumentation : Tag: : - Introduction of Measurement
Electrical and Instrumentation Engineering: Unit IV: Measurements and Instrumentation
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Electrical and Instrumentation Engineering
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