Calibration is defined as “comparison of a measurement standard, or a equipment or computer with a standard of higher accuracy degree, to detect and quantify inaccuracies and report them or delete them by adjustment” (EPA, 2010).
Calibration is the most Important activity of quality control
in the measurement that establishes the relationship of the measured value by an instrument with a value conventionally real, validating and tracking the measurement.
Traceability is a fundamental concept that should be considered in calibration program plan. According to the *NMX-Z-055: 1996 INMC traceability is defined as “property the result of a measurement or value of a pattern, such that it can be certain references related, usually national or international standards, through an uninterrupted chain of comparisons all having uncertainties determined”
When the measuring intrument are frequently used, their accuracy and precision may vary gradually because of the wear parts or interference caused by the accumulation of dust or dirt, so it is necessary to validatethrough a calibration and correct, if necessary.
Measuring Labs require consistents Calibration programs for all CMMs sampling and measurement. It is advisable all data and calculations derived. Calibration register or log in team record.
Each Instrument must be calibrated to operating conditions, according to based procedures in both directions specific manual equipment operation instructions, as in the general guidelines provided by standard methods as VDI-VDE 2617 CNOMO or ISO-EN 10360.
During the execution of Calibration Plan several programs are evaluated whose complexity and implementation may vary depending on the circumstances and stated objectives. Nevertheless, It is important that the calibrations considered the following aspects:
• Traceability standards or Reference materials,
• established and validated procedures,
• Programming, &
• Results Documentation
*This vocabulary provides a set of definitions and terms related to a system of basic and general concepts used in metrology and conceptual diagrams showing relationships. In many of the definitions Further information is provided by means of examples and notes. Intended as a common reference for scientists, engineers, physicists, chemists, doctors, biologists, as well as teachers, students, and anyone involved in planning or carrying out measurements, whatever the scope and level of uncertainty measure. It is also intended as a reference for governmental and intergovernmental organizations, business associations, accreditation committees, regulatory bodies and professional associations.