The anemometer is the most crucial instrument in wind energy related testing and measurements. Its calibration (the definition of the relation connecting anemometer output with the actual wind speed) is a prerequisite for reliable results.

The Laboratory for Wind Turbine Testing (LWTT) performs anemometer calibration in a closed-loop wind tunnel facility located in its premises. The direct and continuous access to the wind tunnel ensures immediate response to calibration requests by our customers. Calibrations are made according to the requirements of IEC61400-12-1/Annex F and MEASNET guidelines.

MEASNET-compliant calibration certificates are provided based on a reference wind speed range of 4m/s to 16 m/s. The upper limit of the calibration range can be extended if requested. The total calibration uncertainty is below 1% at a reference speed of 10 m/s. LWTT participates in the regular interlaboratory comparisons organised within the MEASNET network in order to assure the reliability of the anemometer calibration results.

The Laboratory for Wind Turbine Testing of CRES is accredited according to the ELOT-EN ISO/IEC 17025:2005 by ESYD (Hellenic Accreditation System) under Certificate No 647 for Testing and Calibrations. The accreditation scope of the Laboratory includes anemometer calibration.