Optional item - Swirl control with reference angle calculation (SWIRL method)
This measurement is used when unstable flow conditions occur inside the duct, in the different measurement points, causing the swirling. In order to obtain the most reliable result, EN-16911 standard describes how to calculate a correction factor in the measurement in the presence of swirls. In concrete terms, the velocity measurement probe is made to rotate trying to reach zero point stability and calculating the displacement angle. The angle calculation set must be purchased separately. The calculation program is already installed on Isoflow 202-Pro calculator and the user will simply have to connect the sensor through the USB port for automatic activation.