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IMPORTANT INFORMATION
Read prior to activation
You have just purchased a complicated electronic device. To operate it
properly, please read this manual carefully. Here are some common
Precautions that must be noted.
• NEVER expose the opened objective lens of an active unit in
daylight. At daytime objective lens must be covered by caps. There
is a tiny hole in the cap to provide enough light for day time
operation. It is allowed to turn on the unit at daytime, but the lenses
must be covered by caps.
• NEVER aim active unit at intense light sources (i.e. lights,
headlamps, campfires, the moon, etc.)
• NEVER reverse the polarity of a battery
• NEVER disassemble the unit
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ATTENTION!
Image quality of the object, which is being observed
when an image intensifier is functioning, depends
mainly upon operating characters
of this image intensifier.
Due to this fact black spots, which are inherent in the image
intensifier, may be seen in the field of view of a viewing device.
Field of view is shown below.
Central zone
Boundary zone
Periphery zone
Permissible defects, which may be seen in the field of viewing device,
are given in the table
Type of
black spots
Immovable
Zone
Central
(circle of diameter
5.5 mm)
Boundary
(circle of diameter
5.5-9.0 mm)
Periphery
(circle of diameter
9.0-11.0 mm)
Entire field
(circle of diameter
11.0 mm)
Size of black spots,
mm
Number of
spots
Moving
Not limited Not limited
Not limited
5
1
10
3
1
1From 0.150 to 0.294
From 0.073 to 0.150
From 0.150 to 0.294
From 0.294 to 0.400
Up to 0.073
From 0.073 to 0.150
From 0.150 to 0.294
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