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Vaisala Wind Set WA15
Overview
- High-performance wind measurement set
- Long and successful track record in meteorological applications
- Low measurement starting threshold
- Conical anemometer cups provide excellent linearity
- Heated shaft prevents bearings from freezing
Technical Specifications
| Wind speed | |
| Sensor / transducer type | cup anemometer / opto-chopper |
| Measurement range | 0.4...75 m/s |
| Starting threshold | <0.5 m/s* |
| Distance constant | 2.0 m |
| Accuracy (range 0.4...60 m/s) | |
| with characteristic transfer function | ±0.17 m/s ** |
| 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 | 0.4 m |
| Resolution | ±2.8° |
| Accuracy | better than ±3° |
| Inputs and outputs | |
| Operating power supply WAA151, WAV151 | U=9.5...15.5 VDC, 20 mA typical |
| Heating power supply WAA151, WAV151 | 20 VAC or VDC, 500 mA nominal |
| Output for WAA151 (wind speed) | |
| Transducer output | 0...75 m/s = 0...750 Hz square wave |
| Transfer function | U = 0.328 + 0.101 x R (U = wind speed [m/s], R = o/p pulse rate [Hz]) |
| Transducer output | level (Iout < +5 mA) high state > Uin-1.5 V (Iout > -5 mA) low state < 2.0 V |
| Output for WAV151 (wind direction) | |
| Transducer output | 6-bit parallel GRAY code |
| Transducer output | level (Iout < +5 mA) high state > Uin-1.5 V (Iout > -5 mA) low state < 1.5 V |
| Operating temperature | |
| With shaft heating | -50...+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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