Newcon Optik NVS 7-4x User manual

Operation Manual
NIGHT VISION BINOCULARS
NVS 7-4x / NVS 7-5x / NVS 7-8x
NSN: 5855-20-000-8284
105 Sparks Ave., Toronto, ON, M2H 2S5, Canada

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IMPORTANT INFORMATION
Read prior to activation.
You have purchased a sophisticated electronic device. To
operate it properly, please read this manual carefully.
Ignoring the operation procedures described in this manual
will void your warranty.
NEVER disassemble the unit. This device contains a source
of high voltage, which may be hazardous to your health.
NEVER open the objective lens of an active unit in bright
light, including daylight. In the daytime the objective lens
must be covered by cap. A tiny hole in the cap provides
enough light for daytime testing.
NEVER aim an active unit at intense light sources, such as
lights, headlamps, campfires, the Moon, etc.
NEVER reverse the polarity of a battery.
NEVER connect the unit to any external power supplies.
ALWAYS remove battery when not in use for a long period.
ALWAYS keep the objective lenses covered when not in use.
ALWAYS store the device in a warm dry place.

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Precautions
NVS 7 is a sophisticated precise optical instrument equipped
with electronics. It should be handled with due care:
Unit contains fragile components. Avoid impacts, dust,
moisture and sharp changes of temperature.
Do not touch the optical surfaces other than for cleaning.
Doing so may damage the anti-reflection coating.
Clean optical surfaces with professional lens cleaning
supplies.
Use only a soft clean cloth to clean the exterior of the device.
Keep the device away from sources of heat, such as heating
appliances, sunlight or central heating.
Switch off the unit and remove the battery during the
extended periods of non-operation.
Do not apply an excessive force or pressure to the lens
assembly, movable parts and thread connections.
Small dark and/or light spots may be seen in the field of view
due to considerable optical magnification of the eyepiece.
This does not affect the operational capabilities of the device.

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CONTENTS
1. OVERVIEW............................................................. 3
2. DELIVERY SET ...................................................... 5
Standard delivery set........................................................ 5
Optional accessories ........................................................ 5
3. SPECIFICATIONS .................................................. 6
Unit specifications ........................................................... 6
Main tube parameters ...................................................... 7
Spatial frequency-contrast characteristic ......................... 8
Field of view cleanness.................................................... 8
4. UNIT DESIGN......................................................... 9
5. OPERATION INSTRUCTIONS............................ 12
Installing battery ............................................................ 12
Switching the unit on..................................................... 12
Switching the unit off .................................................... 13
Operating at night .......................................................... 13
Adjusting to individual vision........................................ 13
Focusing ........................................................................ 14
Interpupillary distance ................................................... 14
Installation of interchangeable lenses ............................ 14

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6. TROUBLESHOOTING ......................................... 16
No green light through eyepieces .................................. 16
Image is unclear............................................................. 16
Image flashes ................................................................. 16
Condensation accumulates on the parts ......................... 16
Visibility decreased or disappeared ............................... 16
7. WARRANTY......................................................... 17
8. CUSTOMER SUPPORT........................................ 18
9. ACCEPTANCE CERTIFICATE............................ 19

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1. OVERVIEW
NVS 7 (the unit) is optoelectronic binocular intended for
observation of objects and orientation at night or under dark
conditions. The unit is equipped with a generation 2+ or 3 image
intensifier tube, which amplifies low light, such as moonlight,
starlight or man-made light.
Add-on lens can be attached to the unit to increase magnification.
Some typical activities where NVS 7 can be useful:
Law enforcement
Wildlife observation
Security
Search and rescue
Hunting
Features
Built-in infrared illuminator allows observation in total
darkness (i.e. cave or dark room);
Soft rubber eyecup allows comfortable viewing

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Please read all the instructions carefully prior to using the unit.
Manufacturer reserves the right to introduce minor design
changes without notice.

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2. DELIVERY SET
Standard delivery set
QUANTITY
Binocular configuration:
NVS 7 unit with 4x, 5x or 8x lens
1
Lens cap 1
Neck strap 1
Soft case 1
Manual 1
Warranty card 1
AA battery 2
Lens cleaning kit 1
Optional accessories
Hard case
Exact delivery set is subject to the specific contract terms.

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3. SPECIFICATIONS
Unit specifications
Model 2XT
4x / 5x / 8x
3XT
4x / 5x / 8x
Image Intensifier Tube
(IIT) Gen. 2+ Gen. 3
Apparent field of view 10º / 8º / 5º
Eye relief 25 mm 25 mm
4x / 5x / 8x Objective
focal length / F-number 100 mm - F1.5 / 130 mm - F2.3 / 216.4 mm - F2.0
Interpupillary distance 57-73 mm
Focus range:4x / 5x / 8x 10 m - / 10 m - / 20 m - 
Dioptric correction ±5
Battery type 2 standard AA batteries
Battery life Over 80 hours without IR; over 30 hours with IR
Low battery indicator √
IR ON indicator √
Waterproof MIL-STD-810
Sizes: 4x / 5x / 8x 165x120x70 mm / 230x136x82 / 240x130x130 mm
Weight: 4x / 5x / 8x 0.690kg / 0.800kg / 1.470 kg
NOTE: As the design is being continuously improved the actual
specifications may be better than those given above.

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Main tube parameters
Model NVS 7-2 XT NVS 7-3 XT
Generation 2+ 3
IIT Model NCXT4322 N3XT4322
ITT Resolution, min 57 lp/mm 57 lp/mm
Image Intensifier Type
(Generation/Grade)
2+
XT
3
XT
Photocathode operating diameter, mm 17.5
Photocathode type S-25 GaAs
Photocathode sensitivity, min :
Integral 600 A/ lm 1,600 A/ lm
Spectral at = 850 nm 45 mA/W 180 mA/W
Light amplification >35,000 fl/fc
Image magnification 1x
Max dark background brightness 110  cd/m2
Signal-to-noise ratio 18 20
Current consumption, max 20 mA 25 mA
Voltage 2.80.8 V
MTBF, hours 10K 10K
Operating temperature range -50°C … +55°C