R. M. Young 05106 Marine Wind Monitor
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Wind Speed
The wind speed monitoring system has a helicoid-shaped, four-blade propeller wind speed sensor. Rotation of the propeller produces an AC sine wave; the frequency is directly proportional to the wind speed. The AC signal is induced in a transducer coil by a six-pole magnet mounted on the propeller shaft. The coil is located on the non-rotating central portion of the main mounting assembly, eliminating the need for slip rings and brushes.
Wind Direction
This Young Wind Sensor features a potentiometer for wind direction. With the precision excitation voltage from the datalogger applied to the potentiometer element, the output signal is an analog voltage directly proportional to the azimuth angle.
Construction and Mounting
Construction of this wind speed monitoring system is of rigid UV-stabilized thermoplastic with stainless steel and anodized aluminum fittings. Propeller shaft bearings and vertical shaft bearings are stainless steel precision-grade ball bearings. The 05106 Young Wind Sensor mounts directly on a 1.0 inch IPS Schedule 40 (1.32 inch O.D.) pipe.
Specifications
Range:
Wind speed: 0-100 m/s (224 mph)
Azimuth: 360° mechanical, 355° electrical (5° open)
Accuracy:
Wind speed: ± 0.3 m/s (0.6 mph) or 1% of reading
Wind direction: ± 3°
Threshold: *
Propeller: 1.0 m/s (2.2 mph)
Vane: 1.0 m/s (2.4 mph)
Dynamic Response: *
Propeller distance constant (63% recovery): 2.7 m (8.9 ft)
Vane delay distance (50% recovery): 1.3 m (4.3 ft)
Damping ratio: 0.3
Damped natural wavelength: 7.4 m (24.3 ft)
Undamped natural wavelength: 7.2 m (23.6 ft)
Signal Output:
Wind speed: magnetically induced AC voltage, 3 pulses per revolution. 1800 rpm (90 Hz) = 8.8 m/s (19.7 mph)
Wind direction: DC voltage from conductive plastic potentiometer − resistance 10K Ω, linearity 0.25%, life expectancy − 50 million revolutions
Power Requirement:
Potentiometer excitation: 15 VDC maximum
Operating Temperature:
-50 to 60°C
Sensor Cable:
A water tight pigtail cable is supplied for electrical connections. Available in standard lengths of 3, 8 and 12 meters.
For longer cable lengths a user supplied junction box or connector may be used.
Dimensions:
Overall height: 37 cm (14.6 in)
Overall length: 55 cm (21.7 in)
Propeller: 18 cm (7 in) diameter
Mounting: 34 mm (1.34 in) diameter (standard 1 inch pipe)
Weight:
1.0 kg (2.2 lbs)
Shipping Weight:
2.3 kg (5 lbs)
* Nominal values, determined in accordance with ASTM standard procedures.
