User manual VAISALA WMT700 DATASHEET

[. . . ] www. vaisala. com WMT700 WINDCAP® Ultrasonic Wind Sensors Vaisala WINDCAP® Ultrasonic Wind Sensor WMT700 Series is a robust and reliable ultrasonic anemometer. It measures surface wind, which is one of the key parameters for meteorology and aviation. [. . . ] For the heated model, an additional heating power supply of 24 . . . Thermostatically controlled heaters in the transducer heads and arms of the heated model prevent build-up of freezing rain or snow. In addition, accessories are available for mounting and connecting the WMT700. To minimize interference from birds, a bird prevention kit is available. The WMT700 Series has been designed for professional use. Features/Benefits Measurement Based on Ultrasound The WMT700 series uses ultrasound to determine horizontal wind speed and direction. The measurement is based on transit time, the time it takes for the ultrasound to travel from one transducer to another, depending on the wind speed. The transit time is measured in both directions for a pair of transducer heads. Using two measurements for each of the three ultrasonic paths at at 60° angles to each other, WMO and ICAO compliant Data output rate 0. 25 s Self-diagnostics and validation Bird prevention kit Stainless steel structure Maintenance-free Patented three-transducer layout provides accurate data Data format outputs: polar coordinates and vectors Fully compensates effects of temperature, humidity and pressure Measurement range up to 75 m/s Heating up to 150 W Max. 3600-second averag IP66 and IP67 Robust EMC design Can be mounted upside down Large transducers provide high ultrasound power Wind gust calculated according to the WMO guidelines US National Weather Service relies on Vaisala WINDCAP® technology Technical data Wind speed Measurement range 701 702 703 Accuracy Starting threshold Resolution Response time 0 . . . 75 m/s +/- 0. 4 m/s or 3 % of reading, whichever is greater 0. 01 m/s 0. 01 m/s 250 ms Operating voltage Heating voltage Heating power supply requirement for transducers transducers and arms IP class Material body, arms transducer heads connector housing surface Dimensions height width depth Weight Approvals 9 . . . 40VDC 40 W 200 W IP66 and IP67 stainless steel silicone nickel plated brass 350 mm 250 mm 285 mm 2 kg CE, CE-TICK Wind direction Measurement range Accuracy Starting threshold Resolution Response time 0 . . . 360° +/-2° 0. 1 m/s 1° 250 ms Test standards Wind EMC Environmental Maritime ISO 16622 IEC61000-4-2 . . . 6; CISPR 22 IEC60068-2-1, 2, 6/34, 30, 31, 67, 78; IEC60529; VDA 621-415 Lloyd's requirements, IEC 60945 Outputs Communication media communication 1 communication 2 analog 1 wind speed analog 2 wind direction Message format Baud rate Available averages Readout up-date interval Units digital outputs analog outputs Operating mode Virtual temperature RS485, RS422, RS232, SDI-12 RS485 voltage, current, frequency voltage, current, potentiometer WMT70, ASCII, NMEA, SDI12, ASOS, MES 12, customized 300, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 max. [. . . ] The reproduction, transfer, distribution or storage of information contained in this brochure in any form without the prior written consent of Vaisala is strictly prohibited. All specifications -- technical included -- are subject to change without notice. [. . . ]