Why Calibrate?
For any measurement made, there is always a degree of uncertainty associated with the measurement. When measurements are included in a quality-controlled system, it is required that the uncertainty of measurement (or measurement accuracy) is known and documented in a satisfactory way for all significant components. An accredited calibration procedure requires traceability of the calibration, monitored by a public body with a recognition for international acceptance and trust. An accredited calibration can also be seen as a regular ‘health check‘ of measurement equipment, performed by specialists in an accredited laboratory.

Unfortunately, the word calibration has ended up having two meanings; viz. to describe the use of a sound calibrator in connection with a measurement and to describe periodic verification which is carried out in a Calibration Laboratory.

Accreditation
Traceability
Uncertainty of Measurement

Verification interval:
It is recommended that this sound analyser is verified in a calibration laboratory every two years. Some measurement standards may set other requirements to the verification interval.

This sound analyser was verified according to IEC 61672-3 when it was new.