Liemke CHALLENGER-35 Manual De Instrucciones página 21

Malfunction
The thermal imager
cannot be switched on.
Can't be powered by an
external power source.
The image is blurred,
with vertical lines and
an uneven background.
The image is too dark.
Coloured lines appear
on the display or no
image is shown.
Low image quality/re-
duced detection range.
The smartphone or
tablet PC cannot be
connected to the unit.
No WiFi signal available
or interrupted.
When the unit is used at
low temperatures, the
image quality of the
surroundings is worse
than at temperatures
above freezing.
CHALLENGER-35 · Operating Manual 03 / 2021
Possible reason
The battery is
completely discharged.
USB cable is damaged.
The external power
source is discharged
Calibration needed.
The brightness setting is
too low.
The unit has been
exposed to static
electricity during
operation.
These problems can occur when an observation is
carried out on a day with difficult weather condi-
tions (high humidity, snowfall, rain, fog etc.).
The unit's password has
been changed.
The unit is located in an
area with a large num-
ber of WiFi networks that
may cause interference.
The unit is outside the
WiFi range. There are
obstacles between the
unit and the receiver
(e.g. concrete walls).
At temperatures above freezing, the observed
objects (surroundings and background) are dif-
ferent temperatures due to thermal conductivity,
resulting in a high temperature contrast. Thus, the
picture quality achieved by the unit is higher.
At low outdoor temperatures, the observed
objects (background) usually cool down to about
the same temperature, so that the temperature
contrast is considerably reduced and the image
quality (details) is lower as a result. This is a property
of thermal imagers.
Correction
Charge the battery.
Replace USB cable.
Charge the external
power source (if nec-
essary).
Perform image cali-
bration as described in
section 14. "Calibration
Function (FCC)".
Set the display
brightness.
After the unit has been
exposed to static elec-
tricity, the unit will either
restart automatically or
you will have to switch
it off and on again
manually.
Delete the network and
reconnect using the
existing password.
To ensure stable WiFi
operation, place the
unit in another location
with fewer or no WiFi
networks at all.
Place the unit within line
of sight and range of the
WiFi signal.
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