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Vaisala Wind Set WA25
Overview
- Non-freezing, all-weather wind set for arctic conditions
- Fully heated anemometer and wind vane (heating in cups and vanes, sensor bodies and bearings prevent snow build-up and ice formation)
- High performance, accurate wind speed and wind direction measurement
- Low measurement starting threshold
- Conical anemometer cups provide excellent linearity
Technical Specifications
Wind speed | |
Sensor/transducer type | cup anemometer/opto-chopper |
Measurement range | 0.4...75 m/s |
Starting threshold | <0.5 m/s* |
Accuracy (range 0.4...60 m/s) with characteristic | ±0.17 m/s ** |
transfer function with transfer function U=0.1xR | ±0.5 m/s |
* Measured with cup wheel in position least favoured by flow direction. Optimum position gives approx. 0.35 m/s threshold.
** Standard deviation. | |
Wind direction | |
Sensor/transducer type | vane/optical code disc |
Measurement range (wind speed 0.4...75 m/s) | 0...360° |
Starting threshold | <0.4 m/s |
Delay distance | <0.5 m |
Resolution | ±2.8° |
Accuracy | better than ±3° |
Inputs and outputs | |
Operating power supply | |
WAA252 | Uin = 24 VDC ±10%, max. 3.2 A 72 W below +2 °C (+36 °F) (heating on) 1 W above +6 °C (+43 °F) (heating off) |
WAV252 |
Uin = 24 VDC ±10%, max. 2.1 A 50 W below +2 °C (+36 °F) (heating on) 1 W above +6 °C (+43 °F) (heating off) |
Output for WAA252 (wind speed) | |
Transducer output | 0...75 m/s = 0...750 Hz square wave |
Transfer function | U = 0.39 + 0.10 x R
(U = wind speed [m/s], R = o/p pulse rate [Hz]) |
Transducer output level | (Iout < +5 mA) high state > 11 V
(Iout > -5 mA) low state < 2 V |
Output for WAV252 (wind direction) | |
Transducer output | 6-bit parallel GRAY code |
Transducer output level | (Iout < +5 mA) high state > 11 V
(Iout > -5 mA) low state < 2 V |
Operating temperature | |
With shaft heating | -55...+55 °C (-58...+131 °F) |
Storage temperature | -60...+70 °C (-76...+158 °F) |
For complete specifications, please see the datasheet or user guide in "Documents". |
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