FAQ

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Are there any BATLOGGER demo recordings?
A few demo recordings can be downloaded here.
BATSCANNER/BATSCANNER STEREO turns itself off, why?

In order to save batteries if unintentionally switched on, the BATSCANNER / BATSCANNER STEREO will turn off automatically after 30 minutes of inactivity.

On the BATSCANNER STEREO auto shutdown can be turned off (see manual).

Can also sounds of other animal species, such as rats, be recorded?

Yes. Basically it is possible to record all kinds of sounds in the ultrasonic range (approx 15-150kHz). As our units are tailored to bats, it might be necessary to adjust the trigger settings accordingly, or manually trigger recording.

So far we have positive feedback to:

  • Rats, mice and other small rodents
  • Crickets, grasshoppers and other insects
  • Find noise such as lamps, electronic equipment, jammers, animal repeller
  • Find grinding noises, gas leaks
Can recordings from device XY be opened with BatExplorer?

Yes, if the recording is a WAV file or a RAW file (PCM, e.g. Batcorder). Both real-time as well as time expanded recordings can be opened and analyzed.

  1. Start BatExplorer Software
  2. From the menu "File" select "Open wav..."
  3. Choose the WAV or RAW file and click "Open"
  4. For time expanded recordings, enter the time expansion factor (usually 8 or 10)
  5. For multichannel recordings (stereo), enter the channel number
  6. For RAW files enter the PCM encoding parameters e.g. 500000,16,1
  7. The recording is loaded and if needed transformed
  8. After that, the automatic analysis and call detection starts
  9. Click "OK" to open the recording tab and to display spectrogram, waveform, calls etc.
Can the BATLOGGER C be operated with an external power supply?

As external power supply the following sources can be used:

  • Included power adapter
  • solar panel
  • 10..26V DC, min. 20W (for example, 12V lead battery, power supply, etc.)


The power supply specifications (10..26VDC, min. 20W) must be strictly adhered to. In addition, it is important to note the regional safety regulations.

If a 12V power supply is used, the setting "12V On" must be used to ensure optimal charging (see manual chapter 9.2.7).

Can the BATLOGGER be operated on external power sources?

Yes. The BATLOGGER M can also be operated with the AC adapter plugged in. If no electrical outlet is available, we recommend the StrongBox with their additional batteries to extend the autonomous runtime up to 153h. It is also possible to connect an other suitable power source as a 12V lead accumulator. Please note the following power requirements: 9-15 VDC, min. 5 W, 2.1/5.5mm connector type (e.g. S760, attach positive pole to the inner short solder terminal).

Can the BATSCANNER / BATSCANNER STEREO record bat calls?

Not directly. However, using a commercially available audio recorder the converted calls can be recorded. For this purpose connect a normal 3.5mm jack cable between the headphone output of BATSCANNER / BATSCANNER STEREO and the recorder. With special cables, it is even possible to record with a mobile phone.

The recordings created this way are only partially suitable for evaluation and species identification, since they contain only a limited part of the call information and were transferred into the audible range.

For real recordings we recommend a real-time recording-system.

How does the Crest/Crest Advanced trigger work?

The Crest Trigger releases when the ratio of the loudest frequency (Xmax) and noise (XRMS) is higher than the selected Crest faktor (C):

Advantages Crest Advanced:

  • Very sigh sensitivity (with default settings)
  • Sensitivity can be adjusted easily
  • Upper and lower trigger frequency can be set
  • Reduces triggering due to interference noise up to 25 kHz


Advantages Crest:

  • High sensitivity (with default settings)
  • Sensitivity can be adjusted accurately
  • Lowest operating frequency can be set (HP)


Disadvantages:

  • Responds to any loud, narrow-band sound, eg to technical sounds and insects


Settings Crest Advanced (Values mean default values):

  • Min. Crest = 7, lower values trigger easier
  • Min. frequency = 15 kHz
  • Max. frequency = 155 kHz

Settings Crest (Values mean default values):

  • Min. Crest = 6, lower values trigger easier
  • Min. RMS = 2, lower values trigger easier
  • Min. Peak = 2, lower values trigger easier
  • Min. frequency (HP) = 6 (-> 7 kHz)
How does the Period trigger work?

The difference in sound production of bats (vocal cords) and insects (stridulation) affects the period continuity. The period trigger takes advantage of this:

The trigger fires when ProdVal and DivVal are lower than the set limits (see below), so if the values ​​are within the yellow range.

Advantages:

  • Insects (grasshoppers, crickets) not triggered or only very rarely

Disadvantage:

  • Low frequency bats may not be identified
  • Sensitivity sometimes a little lower than Crest trigger

Settings (Values mean default values):

  • ProdVal = 8, higher values ​​trigger easier
  • DivVal = 20, higher values ​​trigger easier


How long is the effective runtime of the BATLOGGER A?

The runtime depends on various factors:

  • Battery-type (see below)
  • Time frames: The longer the sleep time (sleep mode), the more nights recording time. Also the interval mode can extend the runtime.
  • Bat activity: More bats -> more recordings -> higher power consumption
  • Trigger settings: See above, reduce the number of recordings made with optimised trigger settings, e.g. minimize bad recordings with noise etc. 
How to change the internal CR2032 battery

If the BATLOGGER A / A+ loses the time and date, the internal CR2032 battery is empty and should be changed.

Turn the device off and remove the 8 AA batteries (A) or the battery pack (A+). To change the internal CR2032 battery, the front part of the Batlogger has to be removed. This can be done by loosening the front at the four corners.

Loose the front carefully with a screwdriver at all four corners. Be aware to only do that in the corners so the device doesn't get damaged.

Make sure that you position the screwdriver in the right location.

Continue with this at all four corners.

The front can now be removed and the internal battery is shown. Carefully remove it and replace the old one with a new CR2032.

Put the front back in it's position by connecting it at the top first. Check if both cables are in the right position and aren't being jammed before pushing the bottom connectors back in. 

Push the front back in it's place.

Check that the front is back in it's place in all four corners. You should hear a click sound in all four corners when the connection is correct.

How to import the Data into GIS software?

The data of the recordings like species, temperature, notes etc. can be processed in a geographic information system (GIS). To do this export the data as CSV file (Comma Separated Values, Excel) or KML file (Google Earth).

An example will illustrate the procedure with QGIS.

Export data from BatExplorer:

  1. Setup the fields to export: Menu 'Tools' -> 'Options' -> 'Export' Tab. The coordinates (longitude, latitude) must be exported.
  2. In the project tab, select the desired recordings (CTRL+A for all).
  3. In the menu or context menu (right click) select 'Export' -> 'to CSV ...' .
  4. Enter path and filename.
  5. A file is produced which contains the information in addition to the coordinates.

Import data into QGIS:

  1. Menu 'Layer' -> 'Add Layer' -> 'Add delimited text layer...'
  2. 'Browse' for the previously created CSV file.
  3. If the coordinates fields were not found automatically, assign the appropriate fields (X = Longitude, Y = Latitude, Point coordinates).
  4. Load the data with 'OK'.
  5. Assign the coordinate system (WGS84 or CH1903) depending on the exported fields.
  6. A new layer is added with one point per recording. Use the layer properties to adjust symbols, colors, text etc.
How to reset BatExplorer to factory settings?

If the software is not working properly anymore or the settings are fully displaced and even a reinstallation does not help, BatExplorer should be reset to the factory settings. To achieve this, delete the (hidden) folder "C:\Users\yourname\AppData\Local\Elekon_AG".

  1. Close BatExplorer Software
  2. Press 'Start'+'R' on the keyboard to open the "Run" dialog
  3. Enter "%localappdata%" and click "OK" to open a Windows-Explorer window
  4. Select the folder "Elekon_AG" and delete it with the 'Delete' key
  5. Start BatExplorer Software, the factory settings are loaded
How to reset the GPS module

If your BATLOGGER has problems getting a GPS fix, it can be helpful to reset the GPS module.

To reset the module, go to setup menu 4/7, choose "reset module" and start the reset with >>. 

While using the GPS, please be aware of the following to ensure a good GPS reception: 

  • Use 1 second interval (Setup->Location/GPS)
  • Activate tracking (Setup->Location/GPS)
  • GPS fix before starting the recording
  • The GPS antenna is in the top part of the device and needs a clear view to the sky
  • Keep a distance (>15cm) to other electronic devices (incl. other BATLOGGER devices)
  • After a longer time of not using the Batlogger (> a couple of days) the routes of the GPS satellites have to be updated. The GPS module needs good reception for this and up to 12min time. To make sure that the device doesn't turn off during this time, please open the GPS status menu on the Batlogger (Setup->Location/GPS->Show Status).


How to test the microphone?

By dirt or moisture, the sensitivity of the BATLOGGER microphone may be impaired. With a simple method one can test the functionality of the microphone:
(Caution: The various microphone types have different noise spectrums, please consider the microphone type)


  • Go to a maximal quiet environment
  • Place the protective cap onto the microphone or gently press a sound-absorbing object (eg earplugs) onto the microphone
  • Make a manual recording (press >>)
  • Select approx. one second silence of the recording (wav file) and display the spectrum (eg. with Audacity -> Analyse -> frequency analysis)


Microphone OK (FG):

  • Noise level of approx. -49dB @ 65 kHz
  • Flat spectrum +/- 3dB @ 15 - 90 kHz

Microphone OK (SPM):

  • "W shape"
  • Peak at about 55 kHz and about -46dB
  • Reduction at approximately 100kHz by about -10dB
  • A few scattered peaks are normal


Microphone bad:

  • Low sensitivity (<-50 dB) @ 20 - 50 kHz
  • High noise (>-40 dB) over entire bandwidth
  • Lots of peaks over the whole spectrum

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