12. SCREEN BRIGHTNESS
> Short press the Brightness button to adjust the screen brightness
from level 1 to level 6 and back to level 1.
13. SENSOR CALIBRATION MODE
> Simultaneously long press the Image Mode, Zoom and
Brightness buttons to switch between manual and automatic
calibration modes.
The selected mode is indicated by an M or A symbol in the bottom
right corner of the screen.
During use, the image will deteriorate gradually because of
changing background temperature of the sensor. This needs to be
equalized by periodically calibrating the sensor.
In A mode, calibration is done automatically via an internal
shutter that makes a faint clicking noise. The calibration can also
be done manually by pressing the zoom and brightness buttons
simultaneously during viewing if a deterioration in image quality is
detected during use.
In M mode, no automatic calibration is done. Pressing the Zoom
and Brightness buttons simultaneously during viewing performs a
manual shutterless calibration. During this shutterless calibration,
the lens cover needs to be closed. Otherwise, an image of the
scene viewed during calibration will be imparted on the sensor.
This can be corrected by a proper calibration.
14. VIDEO OUT
> Turn on the analog video recording function by long-pressing
the Zoom button.
The video output icon will appear in the lower-right corner of the
image. The analog video can be output to an external monitor via
the USB interface.
15. CHARGING THE BATTERY
The device is equipped with an internal rechargeable battery that
can be charged via the Mini-USB port on the top of the housing.
The battery indicator in the lower left corner of the screen shows
the charging level of the battery.
> Please recharge the battery no later than when a low battery
charge (red battery symbol) is displayed.
You can charge the battery with the supplied AC adapter or a
portable power supply such as a USB power bank. A Powerbank
with 4000 mAh capacity can double the runtime. The LED indicator
lights up red when charging and changes to green when the
battery is fully charged. The device can be charged during use,
charging is faster than discharge during use.
KEILER-13/-18 PRO CERAMIC · Operating Manual 11 / 2020
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