What is calibrate? Why should the instrument be calibrated? Definition of calibrate

Calibration calibration

The controlled and documented process of measuring a traceable calibration standard and determining that the result is within the specified accuracy of the measuring instrument.

NOTE: Initial calibration is usually performed by the instrument manufacturer or a qualified laboratory using documented methods in a controlled environment. The user then checks the initial calibration results at regular intervals. The combined uncertainty of measurements obtained using calibration standards is lower than the specified accuracy of the instrument.