Vaisala WM30 Technical data

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WM30 Wind Sensor for Mobile Applications

Flexible outputs

A relay contact output is provided for wind speed. The wind speed can be recorded either by counting the number of pulses within a xed time period, or by measuring the time between successive pulses.

A potentiometer detects the position of the vane. The potentiometer features low starting and running torque, linear resistance and a long operation life. It has a single wiper with an open gap of less than 5 degrees. With constant voltage supplied to the potentiometer, the output voltage is directly proportional to the azimuth angle.

The WM30 provides accurate wind measurement in a compact and economical package.

Features/Beneﬁts

Combined wind speed

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and direction sensor with aordable price

Compact and light design is

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optimal for mobile applications

Low power consumption

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Fast and linear response to

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wind

Choice of one-wiper or two-

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wiper potentiometer models

The Vaisala Wind Sensor WM30 is a compact and economical wind speed and direction sensor. The rotating cup anemometer at the top of the unit provides a linear response to wind speed. The vane, which is attached to the body of the unit, provides a fast response to wind direction.

Accurate wind measurement

The shape, dimensions, and material of the cups contribute to accurate measurement. The cups are carefully tested to give linear response between the wind speed and the angular velocity of the cup wheel.

The wind vane is located directly beneath the cup assembly and is made of a durable, lightweight material that ensures fast response and low inertia.

Optimal for low-power applications

The electronics are designed specically for applications where low power consumption is essential.

Built for harsh conditions

The cups and vane are made of reinforced PA plastic which guarantees a rigid structure even at the highest wind speeds.

The electronics are located inside an anodized aluminium core which creates not only a rm body, but a watertight enclosure for the electronics as well. This provides full protection against water, dust, pollutants and electromagnetic interference.

Easy installation

A mast adapter for a 30 mm tube is supplied with the sensor. An installation kit for larger tube diameters, 50 ... 110 mm, is available as an option.

Technical data

Wind speed

Measurement range 0.5 ... 60 m/s Starting threshold < 0.4 m/s Distance constant 2 m Transducer output 1 Hz ~ 0.7 m/s Accuracy (within range 0.4 ... 60 m/s)

wind speed < 10 m/s ± 0.3 m/s wind speed > 10 m/s ± 2%

Characteristic transfer function U = -0.24 + 0.699 × F

(where U = wind speed [m/s], F = output frequency [Hz])

Wind direction

Measurement range

WMS301 with 1-wiper potentiometer 0 ... 355°

WMS302 with 2-wiper potentiometer 0 ... 360° Starting threshold < 1.0 m/s Damping ratio 0.3 Overshoot ratio 0.4 Delay distance 0.6 m Accuracy better than ±3°

General

Supply voltage 3 ... 15 VDC Electrical connections 5-pin male with 12 mm threads Recommended connector at cable end BINDER 99 1436 814 05 Operating temperature -40 ... +55 °C (-40 ... +131 °F) Storage temperature -60 ... +65 °C (-76 ... +149 °F) Material

housing AlMgSi, gray anodized cups PA, reinforced with carbon ﬁbre, black

vane PA, reinforced with ﬁberglass, white Dimensions 265 (h) × 360 (Ø) mm Weight 360 g

Accessories

Mounting adapter WMS30KIT Sensor connector 19370 Sensor connector and cable, 10 m 19904

Test compliance

Wind tunnel tests ASTM standard method D5366-93

ASTM standard method D5096-90

Complies with EMC standard EN61326-1:1997 + Am1:1998 + Am2:2001; Generic Environment

For more information, visit www.vaisala.com or contact us at sales@vaisala.com

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