Calibration is the activity of checking, by comparison with a standard, accuracy of a measuring instrument of any type. It may also include adjustment of the instrument to bring it into alignment with the standard.

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 reading over a range for all continuous values.

• Precision is the degree to which repeated measurements under unchanged condition show the same result.
• Accuracy is the degree of closeness of measurement of a quantity to its actual true value.

Calibration system follows identifying each individual measuring equipment with unique identification number (UID) for tracking all information related to that particular equipment. The system covers other standard requirement of calibration process like, reference standard, storage location, calibration frequency, make, range, least count, status, calibration history, Lab details, calibration certificates etc.

Calibration system has a positive recall system for calibration 15 days before the due date to avoid the failure in calibration or over due of a equipment.