A calibration laboratory is a laboratory that performs test, calibration and repair of measuring instruments.
The calibration of test equipment is achieved by means of a direct comparison against measurement standards or certified reference materials.
These standards are also regularly calibrated themselves, in comparison with another standard of lower uncertainty.

A primary laboratory is a calibration laboratory that performs
internationally adopted fundamental metrological research and which realises and
maintains standards at the highest international level.
An accredited laboratory : Accreditation is a third-party recognition
of a laboratory’s technical competence, quality system and impartiality. An accredited
lab is dedicated to the connecting of the industrial companies to the national standards.
Trescal has numerous calibration laboratories in Europe,
see our locations.