Calibration is performed to verify sensor/instrument performance.
Calibration is the process used to insure that a sensor/instrument maintains specification over time and changing ambient conditions.
Calibration is the process used to maintain traceability of parameter with reference to national/international standards.
Why calibration is required ?
Initial Calibration -
New palnt or equipment commissioning
Verify vendor data - Insure accuracy of measurement.
Minimize and control random and systematic errors
Compare and complement the quality and reliability of measurement by comparison to international standards.
Quality system requirements.Ensure consistent product quality.