Property of a calibration that ensures that measurements are consistent with the International System and comparable to measurements made in any other laboratory in the world. Traceability is guaranteed if all instruments used for calibration have undergone accredited calibrations. At the same time, the calibration of these reference instruments must also be carried out by comparison with instruments that meet this requirement. This establishes a direct relationship with national and international standards.

Accreditation of the laboratory carrying out the calibration is essential to ensure the traceability of the measurements.