Title: 370.011 Siemens Sitrans FUE080 Flowmåler.pdf
Operating Instructions, 07/2012, A5E03059912-0217Description 3.4 Principle of operationThis measuring principle offers the advantage that it is independent of variations in the actual sound velocity of the liquid, i.e. independent of the temperature.The proportional flow factor K is determined by wet calibration or calculated by "Auto" in case of manual programming of mechanical/geometrical pipe data (SONOKIT only). The transducer angle (θ), distance between sensors (L) and pipe dimension (Di and Du) are shown in the figure below.1A1BFigure 3-3 Measuring principleThe ultrasonic signal is sent directly between the transducers. The advantage gained sending signals from point to point is an extremely good signal strength.SITRANS FUS080 transmitter18Operating Instructions, 07/2012, A5E03059912-02Installing/MountingSITRANS F flowmeters are suitable for indoor and outdoor installations.The SITRANS FUS080 has the following temperature specifications: