Operating Manual

 Status of the rechargeable battery (fully charged in advance) and electrical contact (no
salinization or oxidation).
XXIV. Product Maintenance
The device must be maintained in the following ways at least twice each year:
 Wipe the surface of metal and plastic parts to clear off dust and dirt by using a cotton cloth.
Apply silicone grease if required.
 Use non-greasy organic solvent to wash the electric contact and slot of the battery.
 Check the glass surface of the eyepiece and lens. If necessary, clear off the dust and sand
on the lens (preferably using a non-contact method). Use a specialized wiping tool and
solvent to clean the optical surfaces.
XXV. Troubleshooting
The following table lists all problems that are likely to occur during device operation. Check
and address problems by referring to this table. If faults not included in this table occur or you
cannot fix the fault, return the device to the vendor or supplier for troubleshooting.
Fault
Possible Causes
Solutions
The night vision device
can not be started
The battery is out of charge
Charge the battery
The device cannot be
powered by using an
external power supply
The USB cable is damaged
Replace the USB cable
The external power supply is
insufficient
If necessary, check the external power
supply
Images are unclear,
vertical lines are
present, or the
background is not even
Calibration is required
Calibrate the images as per the user
manual