Cleaning And Care; Troubleshooting - Liemke MERLIN–50 Manual De Instrucciones

• It should be noted that changing the clamping position
(horizontally or vertically) can lead to a change in the point of
impact!
• When actively using the optics (e.g. stalking), make sure that
the clamping position of the attachment optics does not
change due to impacts etc.!

18. CLEANING AND CARE

If your thermal imaging camera becomes dirty during daily use,
you can clean it with a soft, lint-free cloth and, if necessary, with
some mild, non-abrasive and non-corrosive cleaning agent.
The optical surfaces in particular must be cleaned with the utmost
care to avoid damage. These measures contribute significantly to
preserving the value of your Merlin-50.

19. TROUBLESHOOTING

This overview lists some problems that may occur when using the
unit.
> Carry out all recommended checks as described in the table.
> If an error occurs that is not listed in the table or if you cannot
rectify an error yourself, the unit should be handed over to the
responsible service centre for repair.
Malfunction
The thermal imager
cannot be switched
on. In the starting
process, the Merlin
switches off again
after the start logo
has been displayed.
Can't be powered
by an external pow-
er source.
The image is blurred,
with thin vertical
lines or shadows.
Low image quality /
reduced detection
range.
MERLIN-50 · Operating Manual 08 / 2021
Possible reason
Batteries are too
weak.
Insufficient external
supply voltage.
USB cable is
damaged.
Calibration needed
These problems can occur under adverse
weather conditions (high humidity, snowfall, rain,
fog, etc.).
At temperatures above freezing, the observed
objects (surroundings and background) usually
have a higher temperature difference.
This can be shown by the thermal imager by
setting the contrast higher. At low outdoor
temperatures, the observed objects cool down
to approximately the same temperature, so
that the temperature contrast is considerably
reduced and the image quality suffers as a re-
sult. This characteristic is due to physical reasons
and does not represent a defect in the thermal
imager.
Correction
Insert new batteries/re-
chargeable batteries.
Recharge the
powerbank.
Use a suitable mains
adapter.
Replace USB cable.
Calibrate the image
(C-button).
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