Newcon Optik nvs 4 用户手册

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页码 20
13 
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. 
 
Reticle is absent or weak
 
Check the batteries.