The Wind Monitor-AQ is a high resolution wind sensor designed specifically for air quality applications. It combines simplicity and corrosion-resistant construction with low threshhold, fast response and excellent fidelity. The wind direction sensor is a lightweight, reinforced polystyrene, vane with performance characteristics that assure excellent fidelity in fluctuating wind conditions. The instrument body is UV stabilized plastic with stainless steel and anodized aluminum fittings. Precision grade, stainless steel ball bearings are used throughout. Wind speed is sensed by a lightweight, carbon fiber thermoplastic (CFT), helicoid propeller. The Wind Monitor-AQ meets the requirements of the following regulatory agencies: U.S. Environmental Protection Agency- Ambient Monitoring Guidelines for Prevention of Significant Deterioration (PSD). U.S. Nuclear Regulatory Agency- NRC Regulatory Guide 1.23 Meteorological Programs in Support of Nuclear Power Plants. American Nuclear Society- Standard for Determining Meteorological Information at Power Plants.
| Range | Wind speed: 0-40 m/s (144kph) Gust survival: 45 m/s (162 kph) Azimuth: 360° mechanical, 355° electrical (5° open) |
| Accuracy | Wind speed: ±0.2 m/s Wind direction: ±3 degrees |
| Threshold | Propeller: 0.4 m/s (0.9 mph). Vane: 0.5 m/s (1.0 mph) at 10° displacement. |
| Dynamic Response | Propeller distance constant (63% recovery) - 2.1 m Vane delay distance (50% recovery)- 1.2 m (3.9 ft) Damping ratio: 0.45 Damped natural wavelength: 4.9 m. Undamped natural wavelength: 4.4 m. |
| Signal Output | Wind speed: magnetically induced AC voltage, 3 pulses per revolution. 1800 rpm (90 Hz) 8.8 m/s (19.7 mph) Azimuth: analog DC voltage from conductive plastic potentiometer- resistance 10K ohm, linearity 0.25%, life expectancy- 50 million revolutions. |
| Power requirement | Potentiometer excitation 15 VDC maximum. |
| Gust Survival | Gust survival: 45 m/s (162 kph). |