Precautions
NVS 7 is a sophisticated precise optical instrument equipped with electronics.
Therefore, it should be handled with due care.
•Try to avoid strong heat, direct sunlight, impacts, dust, moisture and sudden changes of temperatures. Keep in mind that, although being very durable, NVS7 contains fragile components.
•Do not touch the optical surfaces with fingers. Doing so may damage the
•Cleaning of optical surfaces is allowed only with professional camera lens cleaning supplies.
•To clean the exterior of the device, use only a soft clean cloth.
•Do not take the cover off the lens if not necessary.
•Keep away from heating appliances and central heating.
•Make sure to switch off the unit and remove the batteries during periods of
•Do not apply superfluous efforts at work with lens assembly, agile elements and thread connections.
•Due to considerable optical magnification of the
6. TROUBLESHOOTING
The device does not work.
Check that the battery is installed properly.
Check the charge of the batteries. Replace them if they are weak.
The image does not appear in focus.
Bring the inspected object to the center of the image. Rotate the eyepieces (6) to achieve the clearest image on the screen. Then obtain the most
(2). Repeat the steps of focusing if necessary
If the view still does not seem in focus, clean the lenses - they could be foggy or dusty.
Unit flashes
It is normal for the unit to flash within the first 2 minutes of activation. If the flashing continues afterwards the following is a possible cause: bright environment (even with the caps closed!)
Condensation accumulates on the parts.
It is O.K. to use the unit in cold. However, when the unit is brought from the cold into a warm environment, it has to warm up for up to 2 hours (not minutes!).
Only then it is allowed to turn it ON again.
Visibility decreases and / or disappears.
Bright light sources (moon, projectors or headlights) may cause visibility to degrade or even completely disappear. Move the device away from the light source immediately.
The image should be restored in within 2 minutes. Poor atmospheric conditions such as fog, haze or extremely dark environments will decrease the visibility distance of the unit.