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GF 1 and WN 1

Product catalog summary

Product Overview: The GF 1 and WN 1 are specialized extensions designed for measuring sound emissions from wind power stations using boundary layer microphones. These systems comply with DIN EN 61400-11 standards and are engineered to minimize wind noise and ground reflection interference.

Acoustical Specifications: The GF 1 features a primary and impregnated secondary windscreen that reduces wind noise by 40 dB. The boundary layer effect increases microphone sensitivity by 6 dB, enhancing the signal-to-noise ratio by approximately 46 dB. Suitable for class 1 measuring microphones, the system supports a frequency range from 20 Hz to at least 10 kHz.

Electrical Specifications: The WN 1 is a weatherproof power supply unit compatible with both LEMO R and IEPE microphones. It can operate on various power sources and includes a line driver for signal transmission over long distances. The microphone signal amplification is adjustable via a rotary switch.

Mechanical Specifications: The GF 1 is designed for easy calibration and transport, featuring a divisible ground plate and compact suitcase. The system is weatherproof, with a varnished ground plate and impregnated secondary windscreen.

Delivery and Accessories: The GF 1 package includes a ground plate, primary and secondary windscreens, and a suitcase. The WN 1 package includes the MN 921 power supply and a suitcase. Optional accessories include a dehumidifier, sound calibrator, and various connection cables.

Technical Specifications: The GF 1 ground plate has a diameter of 1000 mm and a height of 43 mm. The primary windscreen diameter is 85 mm, and the secondary windscreen is 450 mm. The system weighs 15 kg without the suitcase and 29 kg with it. The WN 1 dimensions are 235 mm x 225 mm x 95 mm, weighing 1.2 kg without battery and sound calibrator.

Catalog excerpts

WN 1 Boundary layer microphone for measurements on wind power stations • standardized noise emission measurements on wind power stations • reduction of the wind noise at the microphone • weatherproof * Optional with weatherproof power supply WN 1 • measurement microphone powering with R LEMO � or IEPE in weatherproof case • line driver • adjustab

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Product overview GF 1 and WN 1 The boundary layer and the weatherproof power supply unit are speciﬁcally developed extensions in order to record the sound emission of wind power stations with measuring microphones pursuant to DIN EN 61400-11. Due to the operation near the ground, unwanted inﬂuences of the measurement results by reﬂections of the ground are avoided. The low wind speed near the ground also has the effect of reducing the wind noise at the microphone. Acoustical speciﬁcations Together with the impregnated secondary windscreen, the primary windscreen of the GF 1 ensures a broadband...

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Product overview Delivery The standard delivery of the GF 1 includes: Ground plate (demountable in three parts) Primary windscreen Secondary windscreen Suitcase 1100 x 510 x 405 mm The standard delivery of the WN 1 includes: Power supply Suitcase Accessories The optional accessories for the GF 1: Dehumidiﬁer The optional accessories for the WN 1: Sound calibrator Connection cable 10 m Connection cable 10 m Connection cable drum 100 m Order.-Nr. 610039 Order.-Nr. 302201 Order.-Nr. 202221 Order.-Nr. 302244 Construction GF 1 Primary Windscreen Secondary Windscreen Ground Plate Microphone Capsule...

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Technical speciﬁcations Boundary GF 1 Diameter ground plate Height of the ground plate (with feet) Diameter primary windscreen Diameter secondary windscreen Height of the boundary with windscreen Weight without suitcase (without measurement microphone element) Weight with suitcase (without measurement microphone element) Weatherproof power supply WN 1 Length Width Height Weight (without battery and sound calibrator) Microtech Gefell GmbH · Georg-Neumann-Platz · 07926 Gefell · Germany Phone +49 (0)36649 882-0 · Fax +49 (0)36649 882-11 · www.microtechgefell.de · [email protected]

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GF 1 and WN 1

GF 1 and WN 1

Catalog excerpts

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