Calibration

» Calibration in measurement technology and metrology is the comparison of measurement values delivered by a device under test with those of a calibration standard of known accuracy. Calibration refers to the act of evaluating and adjusting the precision and accuracy of measurement equipment. Instrument calibration is intended to eliminate or reduce bias in an instrument's readings over a range for all continuous values.

» Although the exact procedure may vary from product to product, the calibration process generally involves using the instrument to test samples of one or more known values called “calibrators”.

The results are used to establish a relationship between the measurement technique used by the instrument and the known values. Calibration is a comparison between a known measurement (the standard) and the measurement using your instrument. Typically, the accuracy of the standard should be ten times the accuracy of the measuring device being tested. ... To explain how calibration is performed we can use an external micrometer as an example.

» Validation / Calibration - Validation is a documented program that provides high degree of assurance that a specific process, equipment, method or system consistently produces a result meeting pre-determined acceptance criteria.Calibration is a demonstration that, a particularInstrument or device produces results with in specified limits by comparisons with those produced by a reference or traceable standard over an appropriate range of measurements.