Calibration

The process of comparing a measurement instrument against a traceable standard of known accuracy — and adjusting if necessary.

Calibration ensures that measurement equipment produces results within specified tolerances, traceable to national or international standards (NIST, ISO 17025). A calibration program includes an equipment register, calibration intervals based on usage and drift history, out-of-tolerance procedures (assessing impact on products tested since last calibration), and calibration certificates. ISO 9001 and IATF 16949 require documented calibration procedures and records. In QEHS platforms, calibration management links to equipment inspection schedules and preventive maintenance workflows.