Metrology-Laboratory
Introduction to Laboratory Metrology
Concept and scope of metrology in laboratory
Laboratory metrology refers to the science and technique of measurements applied in controlled environments, with the aim of obtaining precise and reliable data. Its scope ranges from the calibration of instruments to the validation of test methods, being essential to ensure the traceability and accuracy of the results.
This field is essential in multiple industrial and scientific sectors, guaranteeing that measurements obtained in a laboratory are comparable and reproducible at a national and international level. Furthermore, laboratory metrology contributes to the continuous improvement of production processes and compliance with regulations and quality standards.
Fundamentals of Laboratory Metrology
Basic principles of metrology
The fundamental principles of metrology include traceability, accuracy, precision and uncertainty of measurement. Traceability ensures that measurements can be related to national or international standards through an unbroken chain of comparisons.
Accuracy refers to the closeness of a measurement to the true value, while precision indicates the repeatability of the results under the same conditions. Finally, uncertainty represents the range within which the true value is expected to lie at a specific confidence level.
Units and standards of measurement
The units of measurement in metrology are based on the International System of Units (SI), which defines universal standards for quantities such as length, mass, time, temperature and electricity, among others. Measurement standards are artifacts or systems that represent these units with the greatest possible accuracy.
In laboratories, standards are used to calibrate instruments and validate methods. These can be primary standards, which have the highest precision and are directly related to SI definitions, and secondary standards, which are calibrated against the primary standards and are used for routine use.