User manual VAISALA WAT12 DATASHEET

[. . . ] Box 26, FI-00421 Helsinki, FINLAND Tel: +358 9 894 91 Fax: +358 9 8949 2485 Email: industrialsales@vaisala. com www. vaisala. com/WAT12 WAT12 Analog Wind Transmitter Features/Benefits · · · · · The WAT12 is designed to convert the wind speed and direction data measured into two analog current loop signals. Converts the digital data supplied by the Vaisala Wind Set 15 and the Vaisala Wind Set 25 into two industry standard analog current loops; one for speed, the other for direction Selectable loop current Suitable for nearly any input type Wide range of input power provides the sensors with a throughput for optional heating power. The Vaisala Wind Transmitter WAT12 is an economic solution to a standard interface between Vaisala's wind sensors and analog panel meters, chart recorders, digital LCD or LED displays, data loggers, computers with analog inputs, etc. [. . . ] The heating power connection, if required, calls for an extra pair of wires. Since the heating elements typically consume some 500 mA, the heating power is most conveniently supplied from a local power source. A thermostat switch is optionally available for automatic connection of heating power below +4 °C (+39. 2 °F). User selectable loop current The loop current is selectable of, e. g. , 4 . . . The loops are supplied by high-side drivers with a return to the signal & power ground; thus nearly any input 128 Vaisala Instruments Catalog 2008 Ref. A WAT12 WIND Technical Data Digital-to-analog current loop converter for Vaisala wind sensors General Input operating power Output sensor power On-board regulated to Temperature range operating storage Humidity Material Cross arm Junction box 12 . . . 100 %RH AI anodized AI painted grey Signal input from sensors Wind direction Wind speed 6-bit parallel GRAY code (optionally 7 bits) Pulse frequency 0 . . . 750 Hz Output signals Two analog current loops, one for direction, one for speed. Highside drivers; the loops return to the common signal & power ground. [. . . ] 76. 8 m/s Signal cable 4 wires minimum (Vin+, Vin­, DOP, SOP) Specifications subject to change without prior notice. [. . . ]