First steps:
O en the battery case on the rear side and lace a 9 volt battery in the
com artment. Please ay attention to the olarity of the battery. To turn
the detector on ress the On/Off button (D) until the dis lay (B) shows
'----'. Press the + button within a second to confirm this or the detector
will switch off.
This revents the detector from accidentally being switched on while being
carried.
If the device is not used for a long eriod of time lease remove the
battery from the com artment.
Setting the volume:
After switching the detector on the volume is set to midscale. Use the
buttons + and – (F) to set the volume to the level required. The setting
a lies to all modes. You may change the volume at any time.
Setting the frequency:
The call frequency is selected by the thumbwheel (G) on the right side.
The lowest frequency is 18 kHz, the maximum is 130 kHz. For technical
reasons the u er maximum may be exceeded. To give you the best
resolution and to com ensate for fluctuations of tem erature and voltage
the HD mode will be recalibrated every time the detector is switched on or
switched into HD or TE mode. A battery can be used until it's end of life.
Testing your etector:
You can test your detector by setting the detector to a low frequency u to
25 kHz and rub your fingers ~30cm from the micro hone. You should now
hear this noise very clearly on the head hones. If you notice other noises
you may check your surrounding area for other ultrasonic sources like
energy saving lam s, neon lam starters or switching ower su lies.
Influences on the reception of the etector:
Bat calls can be very different de ending on s ecies and the surrounding
enviroment. Some s ecies call in the lower, energy-rich ultrasonic range
and can be easier to hear than s ecies which call in the u er band.
Bats ada t their calls de ending on the habitat. In an o en area with few
or no obstacles the calls are louder but more rare than in a thick forest.
The rece tion is also affected by the distance to the bat, flight direction
and atmos heric conditions. The higher the frequency of the call, the more
