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The Metrology is the scientific discipline devoted to the analysis of systems of measures and weights. Its object of study is the measurements of magnitudes, promoting traceability to promote normalization.

Thanks to metrology it's possible to discover and express the value of magnitudes accurately, appealing to various methods, instruments and techniques to achieve the desired result.

The industry and science need of metrology. The tasks of accreditation, certification and standardization are essential to guarantee the accuracy of the results and enable the exchange and comparison at international level.

It's important to note that measurements and weighings can be developed with multiple tools. Some elements are simple, such as stopwatches and rules, but others are very complex, such as computers (computers) and microscopes.

One of the tasks of metrology is to promote the calibration of instruments. This process allows you to compare what the device indicates and what it should indicate according to a reference pattern that has a known value. When the instrument is calibrated, it works accurately.

Calibration is linked to traceability, another goal of metrology experts. Traceability is called ownership of results when they can relate to certain patterns and, by extension, to the fundamental units of the International System. To reach this instance, a chain of comparisons without interruptions is needed.

It should be noted that there are different areas or specializations of metrology. One of them is electrical metrology, oriented to the study of intensity, impedance, resistance, voltage and other magnitudes associated with electricity.

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