03002

Wind Sentry Set
03002

03002

Orderable

Wind Sentry Set

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Model:
03002
Item Number:
45009
Warranty:
1 year

Overview

The 03002, manufactured by R. M. Young, measures wind speed and direction with a three-cup anemometer and a wind vane mounted on a small crossarm. It interfaces directly with your Campbell Scientific data loggers, so no signal conditioning is required.

Key Advantages

Reliable, Competitively Priced
Good, all-purpose wind set

Technical Description

The 03002 uses a cup wheel assembly to measure wind speed. Rotation of the cup wheel produces an ac sine wave that is directly proportional to wind speed. The frequency of the ac signal is measured by a data logger pulse count channel, then converted to engineering units (mph, m/s, knots). Campbell Scientific’s version uses shielded bearings, which lowers the anemometer’s threshold.

Wind direction is sensed by a potentiometer. With the precision excitation voltage from the data logger applied to the potentiometer element, the output signal is an analog voltage that is directly proportional to the azimuth angle of the wind direction.

Product Notes

requires CM220 or 17953

Benefits

  • Compatible with most Campbell Scientific data loggers
  • Designed for continuous, long-term, unattended operation in adverse conditions
  • Small size, simplicity, and rugged construction provide a quality instrument for a modest price
  • Ideal for wind profile studies
  • Compatible with the LLAC4 4-channel Low-Level AC-Conversion Module, which increases the number of anemometers one data logger can measure
  • Campbell Scientific version uses shielded bearings, which lowers the anemometer's starting threshold
  • Compatible with the CWS900-series interfaces, allowing it to be used in a wireless sensor network

Specifications

Applications
General

(Rain with light snow. Little or no riming or blowing sand. No salt spray.)

Sensor
3-cup anemometer and vane
Measurement Description
Wind speed and direction
Operating Temperature Range
-50° to +50°C

(assuming non-riming conditions)

Height
32 cm

(12.6 in.)

Crossarm Length
40 cm

(15.7 in.) between instruments (center-to-center)

Mounting Diameter
34 mm

(1.34 in.); mounts on standard 1-in. IPS pipe

Wind Speed (Anemometer)

Range
0 to 50 m/s

(0 to 112 mph)

Gust Survival
60 m/s

(134 mph)

Sensor
12-cm diameter cup wheel assembly, 40-mm diameter hemispherical cups
Accuracy
±0.5 m/s

(1.1 mph)

Turning Factor
75 cm

(2.5 ft )

Distance Constant
2.3 m

(7.5 ft) 63% recovery

Starting Threshold
0.5 m/s

(1.1 mph)

Transducer
Stationary coil

(1300 ohm nominal resistance)

Transducer Output
AC sine-wave signal induced by rotating magnet on cup wheel shaft 100 mV peak-to-peak at 60 rpm

(6 V peak-to-peak at 3600 rpm)

Output Frequency
1 cycle per cup wheel revolution

(0.75 m/s per Hz)

Cup Wheel Diameter
12 cm

(4.7 in.)

Weight
113 g

(4 oz)

Wind Direction (Vane)

Mechanical Range
360°
Electrical Range
352°

(8° open)

Settling Time
20 ms
Sensor
Balanced vane; 16 cm turning radius
Accuracy
±5°
Damping Ratio
0.2
Delay Distance
0.5 m

(1.6 ft) 50% recovery

Starting Threshold
0.8 m/s

(1.8 mph) with 10° displacement

1.8 m/s

(4 mph) with 5° displacement

Transducer
Precision conductive plastic potentiometer

(10 kohm resistance)

1.0% linearity
Life expectancy is 50 million revolutions.
Rated 1 W at 40°C, 0 W at 125°C.
Transducer Excitation
Requires regulated dc voltage.

(15 Vdc maximum)

Transducer Output
Analog dc voltage proportional to wind direction angle with regulated excitation voltage supplied by the data logger
Vane Length
22 cm

(8.7 in.)

Weight
170 g

(6 oz)

Ships With

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Compatibility

Mounting

The 03002 is supplied with a 12-in.-long x 1-in. IPS unthreaded aluminum pipe, which mounts to a crossarm via a CM220 Mount or 17953 Nu-Rail fitting. The 03002 can also be mounted to the top of a CM106B or stainless-steel tripod via the CM216.

Wind Profile Studies

An ideal application for the Wind Sentry is wind profile studies. For this application, the LLAC4 4-channel Low Level AC Conversion Module can be used to increase the number of anemometers measured by one data logger. The LLAC4 allows data logger control ports to read the anemometer’s ac signals instead of using pulse channels. Data loggers compatible with the LLAC4 are the CR200(X)-series (ac signal ≤1 kHz only), CR800, CR850, CR1000, CR3000, and CR5000.

Data Logger Considerations

Programming

The anemometer is measured by the PulseCount instruction in CRBasic, and by Instruction 3 (Pulse Count) in Edlog. The wind vane is measured by the BrHalf Instruction in CRBasic, and by Instruction 4 (Excite-Delay-SE) in Edlog. The measurements are typically processed for output with the Wind Vector Instruction (not present in the CR500 or CR9000).

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