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Included are a microphone disc and microphone, controller module for status message delivery (SMS) and intelligent power management, and material to attach batcorde etc. in the nacelle
The extensions's control module is responsible for controlling the power. While the batcorder is turned off (daytime) the module is connected to the power line within the nacelle (110 - 240 Volt) and charges the lead-acid gel battery. When the batcorder turns on, the module disconnects from the main power-line. batcorder and module now run on power from the lead-gel battery. The batcorder is galvanically isolated from the power line to eliminate noise induced from the power-line. If the main power of the nacelle is switched off, the batcorder still can run for a couple of nights on the lead-gel battery (UPS function).
Just before sampling is stopped, the control module sends a status message per SMS to any selected cell phone number. That way you always stay informed on recording count, memory status and other information. If possible it also reports problems with the power supply. This feature requires that you install a SIM card for dialing into your cell phone carriers network. you'll need a connection to a cell phone network to use the feature.
Fundamental considerations for acoustic monitoring on WPUs
The nacelle of a wind power unit (WPU) is basically a suboptimal location for acoustic sampling. Extreme weather conditions put a lot of strain on the microphone and may lead to loss of sensitivity. Strong electromagnetic fields and acoustic noises may temporarily exist and lead to large numbers of erroneous recordings without bat activity.
Monitoring for a prolonged period of more than one year, as demanded by some authorities, is not possible to do with todays technologies without regular service of the used devices. For example can microphone or device be damaged by strong frost.
The type of the wind turbine and as well as the placement of the batcorder within the nacelle have an influence on the amount of interferences. In most type of WPUs the batcorder can be used without problems. Some older WPUs seem not to be as optimal as new systems. We recommend to schedule a talk to technicians of the producer of the WPU to allow for special adaptions etc. Maybe test runs will be necessary in addition.
Installation and usage
For the installation of batcorder and wind turbine extension you'll need certified technicians of the turbine producer or operator. Thus we recommend you pan the installation schedule early. Apart from giving general tips on how to setup the batcorder we can not do the installation for you.
Each wind turbine extension includes a control module (power and SMS control), a microphone disc with calibrated microphone, installation accessory as well as cables.
You'll need in addition:
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