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Calibration is a process by which a measuring instrument is compared against a known reference.

 

To quantify instrument performance at a series of controlled conditions where stability/equilibrium has been reached.

 

Calibration gives the user a level confidence in the instrument and the measurements it provides.

 

A calibration will help identify key instrument characteristics:

•Errors when compared to a reference,

•Stability (drift),

•Repeatability...

 

The user can assign a "tolerance" to measurement data (uncertainty).