USER MANUAL BATMODE 2S/2S+ SYSTEM
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3.1.6
Microphone Disc GM50/GM90 (optionally)
To install the microphone disc GM50 or GM90 also a mounting hole with 60 or 100 mm diameter,
respectively, has to be drilled in the bottom of the nacelle of the wind turbine. In compliance to most
legal guidelines, the best place is at the bottom of the nacelle between the tower and the rotor of the
wind turbine. To guarantee for optimal acoustical bat monitoring results the disc should be installed
looking down to the ground as vertically as possible. The disc has to be mounted with three 3.5 mm
SPAX-screws. bat bioacoustictechnology recommends to pre-drill the mounting holes for the SPAX-
screws.
To avoid damage caused by water do not install the disc in the lowest point of the
nacelle. Moisture can cause system failure or damage to the BATmode system.
Since the GM90 microphone disc is calibrated with the foam ring for weather protection,
do not remove it to ensure a correct data acquisition.
3.1.7
Tower Microphones TM10 and TM20 (optionally)
To install the tower microphones in the wall of the tower of the wind turbine, a borehole with at least
22mm (TM20) or 14mm (TM10) diameter is required. If possible, this should be on the side of the
tower facing away from the main rain and wind direction. With the help of the optional mounting rod
and the magnetic base, the microphones can be fixed in steel towers to the desired depth. For tower
made of concrete, please use adhesive pads on the magnetic feet to attach the microphones on the
inner wall.
Alternatively, the TM20 Tower Microphone can also be fixed using a M3 threaded hole on the back of
the microphone housing.
Make sure that the tip of the tower microphones slightly protrudes on the outside of
the tower. If your microphone tip is within the borehole, acoustic reflections on the bore
walls may reduce the quality of your recordings.
