KEILER-13/-18 PRO CERAMIC
· Operating Manual 08 / 2021
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16. LED LIGHT
> When the device is switched off, you can press the Picture
Mode button to activate the LED light above the lens.
As soon as you release the button, the lamp turns off.
17. TECHNICAL INSPECTION
A technical inspection of the device is recommended before use.
> Check the external appearance of the device. There should be
no cracks in the casing.
> Check the condition of the lens and eyepiece: There should be
no cracks, greasy spots, dirt or other deposits.
> Check the condition of the rechargeable battery: This should be
charged.
> Check the electrical contracts: There should be no presence of
salts or oxidation.
18. MAINTENANCE
Maintenance should be carried out at least twice a year and
consist of the following actions.
> Wipe the external surfaces of metal and plastic parts free of
dust and dirt with a cotton cloth. Silicone grease may be used
for this.
> Clean the electrical contacts of the unit using a non-greasy
organic solvent.
> Check the glass surfaces of the eyepiece and the lens. If neces-
sary, remove dust and sand from the lenses (preferably using a
non-contact method). Cleaning of the external surfaces of the
optics should be done with substances designed
specially for this purpose.
19. TROUBLESHOOTING
This table lists all the problems that may arise when operating the
device. Carry out the recommended checks and repairs in the
order shown in the table. If a defect should occur that is not listed
in the table, or if it is impossible to repair the defect yourself, the
device should be returned for repair.
Malfunction
Possible reason
Correction
Thermal imager
does not power up.
Battery completely
discharged
Charge the battery
Does not operate
from external power
source.
USB cable
damaged
Replace USB cable
External power source
discharged
Charge external power
source (if necessary).
Image is unclear,
with vertical lines
and uneven back-
ground
Calibration required
Perform image calibration
according to Section
13 „Sensor Calibration
Mode“ of the Manual.
The image is too
dark.
Low brightness level set. Adjust display brightness.
Colored lines
appear on display
or the image has
disappeared.
The device was expo-
sed to static electricity
during
operation.
After exposure to static
electricity, the device may
either reboot automati-
cally or require turning off
and on again.
Poor image quality /
reduced detection
distance
These problems may occur during observation in
difficult weather condi tions (high humidity, snow,
rain, fog, etc.).
When used in
lowtemperature
conditions, the
image quality of the
surroundings is worse
than in positive tem-
perature conditions.
In positive temperature conditions, objects being
observed (surroundings and background) heat up
differently because of thermal conductivity, thereby
generating a high-temperature contrast. Accor-
dingly, the image quality produced by the device
will be higher. In low-temperature conditions, objects
being observed (background) do, as a rule, cool
down to roughly the same temperature because of
which temperature contrast is substantially
reduced and the image quality (detail) is poorer.
This is a feature of thermal imaging devices.
