Our Ultrasonic Portable has been certified by National Entity of Accreditation (ENAC)
ENAC has done the calibration according to the established in document PE-02 of the LAC, IDR / UPM.
The S4 tunnel has been used. It has a closed test chamber, open fluid cycle and adjustable speed. The test chamber has a front area of 0.9 m wide and 0.9 high.