User manual VAISALA FD12P BROCHURE

[. . . ] the amount of water measured on the capacitive precipitation sensor. For many applications Typical applications for the Vaisala Weather Sensor FD12P are present weather identification and visibility measurement at airports and remote weather stations. The FD12P is ideal for fully automated weather observation, but can also be used to support human observers at semi-automatic stations. [. . . ] By analyzing the combined measurements, the FD12P can also distinguish between fog, mist and haze. In international field tests, the FD12P's ability to detect light precipitation has proven exceptional. Accurate visibility measurement The Vaisala forward scatter technology implemented in the Vaisala Weather Sensor FD12P has demonstrated unparalleled accuracy in international comparisons. The excellent accuracy of the optical sensor has been achieved with a well thought-out electro-optical design and sophisticated signal analysis. The FD12P automatically compensates for visibility measurement during precipitation. Accuracy is maintained in all weather conditions. Minimizing maintenance All the hardware used in the Vaisala Weather Sensor FD12P, from the electronic components to the optical surfaces, has stood the test of time in the field. "Housekeeping" sensors detect the presence of contaminating particles on the optical pathways. Internal diagnostics test the electronics at regular intervals. The surface of the capacitive precipitation sensor "feels" the amount of water that falls on it. When frozen precipitation collects on the surface it is heated in a carefully controlled manner. The resulting water is measured to find the water equivalent of the frozen precipitation. Technical Information Present weather Detects Measures Reports 11 different precipitation types Precipitation intensity 52 codes from WMO code table 4680 and 4678 and NWS codes Environmental Operating temperature Operating humidity -40. . . +55 °C Up to 100 % RH Mechanical Height Width Weight 230 cm 160 cm 35 kg Visibility measurement MOR measurement range 10 . . . 50 000 m Instrument consistency Visibility measurement consistency +4 % Accessories FD12MODEM FDA13 LM21 FD TERMBOX-1200 Fixed line modem, 300 baud Calibration set Background luminance sensor Surge protector device for mains and signal lines Precipitation measurement Precipitation detection Precipitation intensity above 0. 05 mm/h, within 10 minutes range 0. 00 . . . 999 mm/h Electrical Power supply Power consumption I/O connections 115/230 V ±20 %, 50/60 Hz 35 W + 100 W heating RS-232, RS-485 Also available: the Vaisala Visibility Meter FD12, a forward-scatter weather sensor that measures visibility without the present weather measurement features provided by the Vaisala Weather Sensor FD12P. Contact your Vaisala representative for more information. Vaisala Oyj Helsinki, Finland Tel. +358 9 894 91 Fax +358 9 894 9227 Vaisala GmbH Hamburg, Germany Tel. +49 40 839 030 Fax +49 40 839 03 110 Vaisala Ltd Birmingham, UK (Traffic Weather Products only) Tel. +44 121 683 1200 Fax +44 121 683 1299 Vaisala Ltd Newmarket, UK (Upper Air and SurfaceWeather Products only) Tel. +44 1638 576 200 Fax +44 1638 576 240 Vaisala SA Paris, France Tel. [. . . ] +1 519 679 9563 Fax +1 519 679 9992 Vaisala KK Tokyo, Japan Tel. +81 3 3266 9611 Fax +81 3 3266 9610 Vaisala Pty Ltd Hawthorn, Vic , Australia Tel. +61 3 9818 4200 Fax +61 3 9818 4522 Vaisala Beijing Representative Office P. R. China Tel. [. . . ]