A calibration laboratory is a laboratory that facilitates testing, calibration and repair of measuring instruments. The equipment and instruments are calibrated against standard or certified measures. Calibration laboratories are accredited by standard institutes to enable them to perform these tests. These accreditations are done on the basis of their technical competence and quality of work. Calibration laboratories offer their service and expertise for the execution of measuring system methodologies, customizing equipment for specific use, enabling software systems in taking measurements, meteorological measurements, technical support for measuring instruments and training of personnel.