User manual VAISALA FS11 DATASHEET

[. . . ] Box 26, FI-00421 Helsinki, FINLAND Tel: +358 9 894 91 Fax: +358 9 8949 2485 Email: industrialsales@vaisala. com www. vaisala. com Vaisala FS11 Visibility Sensor for RVR Applications Features/Benefits · Especially built for Runway Visual Range (RVR) Applications · Meets FAA and ICAO specifications for visibility measurement · Selected by FAA · Accurate and traceable measurement · Mechanical design and highpower heating follow FAA guidelines · Range up to 75 km · Can also be used for aeronautical and SYNOP visibility measurements · Composite fiber mast meets the frangibility requirements of airports Scientifically valid chain of calibration Every Vaisala FS11 is calibrated through a scientifically valid chain of reference. [. . . ] As a final measure, there is an optical path clearance monitoring circuitry to verify that measurement is not affected by obstructions. Low maintenance need The FS11 incorporates a new technique that measures and compensates for window contamination. It ensures unparalleled measurement accuracy throughout the interval between window cleanings. It also enables much longer window cleaning intervals than the former RVR visibility sensors. The unique system works by monitoring the total reflectance of the window surface. It automatically compensates for Reliable operation in the harshest weather Four main design features are combined in the FS11 to ensure reliable operation in the harshest weather. The second is the "headdown" design of the optical heads, which protects them against virtually all windblown particles (even those flying horizontally). FS11 VISIBILITY Technical Data Operational Measurement range (MOR) Accuracy Scatter measurement accuracy 5 m . . . 75, 000 m; 1, 3 and 10 min averaging ± 10 % range 5 m . . . [. . . ] 100 % Up to 60 m/s Specifications subject to change without prior notice. [. . . ]