Operating Manual

19. WIFI FUNCTION
> Download the "T-Vision" app at: https://liemke.shop/medien
> Activate the WiFi function on your end device (mobile phone or
tablet).
> Activate the WiFi function in the main menu and connect your
end device to the WiFi signal.
The name of the WiFi network corresponds to the serial number
of the Challenger-35; the password also corresponds to the serial
number, starting with the letter (e.g. D58796584).
After the WiFi connection has been successfully established:
> Start the T-Vision app and confirm the green "Connect" button.
> Confirm the green "Activate" button on the next screen.
> Confirm the next green "Activate" button to start the live image.
You can access the saved image data under the menu item in the
live image mask at the top left.
20. 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 can be used
for this purpose.
> Clean the contacts of the unit with 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
optic should be done with substances designed especially for
this purpose.
21. TROUBLESHOOTING
This table lists all the problems that can occur when using the unit.
Carry out all recommended checks and repairs 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.