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

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Spatial frequency-contrast characteristic
Frequency, lines/mm Contrast transfer
coefficient (XT)
2.5 0.88
7.5 0.72
15.0 0.50
Field of view cleanness
SPOTS DIAMETER ZONE 1 ZONE 2 ZONE 3
IN MICRONS Ø5.6MM Ø5.6-Ø14.7MM Ø14.7-Ø17.5MM
> 230 0 0 0
150 - 230 0 1 1
75 - 150 0 1 2

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4. UNIT DESIGN
NVS7 – 4x
1. On-Off, IR switch
2. Lens focus adjustment ring
3. Eyepiece focus adjustment rings
4. Eyepieces
5. Battery compartment cover
6. Objective lens
2
3
4
5
6
1

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NVS7 – 5x
1. On-Off, IR switch
2. Lens focus adjustment ring
3. Eyepiece focus adjustment ring
4. Eyepieces
5. Battery compartment cover
6. Objective lens
1
2
3
4
5
6

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2
NVS7 – 8x
1. On-Off, IR switch
2. Lens focus adjustment ring
3. Eyepiece Focus adjustment rings
4. Eyepieces
5. Battery compartment cover
6. Objective lens
7. Objective lens cover
8. Tripod mount
1
6
7
5
3
4
8

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FIGURE 1
Low battery indicator
5. OPERATION INSTRUCTIONS
Installing battery
Unpack the device. Unit is supplied with battery not installed.
Prior to installing the battery, make sure the switch is in the
OFF position and the lens cap is on.
Unscrew the battery compartment cover (5) and install 2 fresh
AA batteries. Observe the correct polarity indicated on the
housing. Screw in the battery compartment cover back.
Switching the unit on
In daylight put on the lens cap prior to switching the unit on.
To check if the unit is operational switch it ON (1) and look
through eyepiece (4). You should see
greenish-lit screen. If the screen is not
lit check the battery.
When the unit is ON user may see a
circular indicator through the eyepiece
(Fig. 1). It is hardly noticeable when
not active.
Flashing indicates low battery. For
uninterrupted operation keep fresh
batteries ready and replace them in
time.

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Solid red dot indicates that the IR illuminator is on.
In the daytime with lens cap on it is normal to observe a fuzzy
image. Switching on the unit device in the daytime is intended
for testing purposes only.
Switching the unit off
After you have finished using the device, turn it off by rotating
switch (1) to OFF position. Put protective lens cap
(ex.NVS7-8x, 7) on the lens. Remove the battery from the
battery compartment to avoid damaging of the device in case of
electrolyte leakage.
Operating at night
Take off the lens cover from the lens (6). Turn on the
device using switch. If lighting is insufficient, turn on the
IR illuminator (1) by turning switch. The red indicator
(Fig. 1) will go on. IR illuminator is effective when
observing an object located not far from the viewer.
The IR illuminator is visible to anybody with a night
vision device.
Adjusting to individual vision
Turn on the device. Direct the device at an object placed within
8-20 m from the viewer. Obtain the sharpest image possible on
the eyepiece (4) screen by focusing the eyepiece lens (3) and
then the objective lens (2).

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Focusing
To obtain sharp image at other distance adjust the lens focus
(2)leaving eyepiece setting intact. You should be able to obtain a
sharp image for distances from 2-20 m to infinity, depending on
the objective lens magnification.
If you wear eyeglasses or NBC protective mask, you may like to
fold the rubber eyecup.
Interpupillary distance
The unit is designed to accommodate interpupillary distance of
57-73 mm without any additional adjustment and should be
comfortable for 99% of adults.
Installation of interchangeable lenses
Do not apply an excessive force when changing the lenses.
1. Make sure the unit is off (1).
2. Remove the lens cap
3. Detach the current lens: hold the lens by its base and
rotate it counter-clockwise. Once the lens has been
removed, store it in a safe, clean space.
4. Screw in (clockwise) new lens.
The threads are very fine (to prevent humidity penetration) and
can be damaged easily. Do not apply force to the lens rotation. If
lens does not screw in smoothly make sure that the threads
match.
Unit is ready for operation immediately after the lens change.

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Warning: Forcing installation of the lens may damage
the thread and cause costly repairs to both the
binoculars and the lens that are not covered by
warranty.

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6. TROUBLESHOOTING
No green light through eyepieces
Check that the batteries are installed properly.
Check the charge of the batteries. Replace them if they are weak.
Image is unclear
Check if the lenses are foggy or dusty. Clean them if necessary.
If the image is still unfocused – adjust the eyepieces; see 5.5 and
5.6 for details.
Image flashes
Image may flash during the first two minutes after activation. It
may continue flashing if exposed to bright light (even with the
lens cap on!).
Condensation accumulates on the parts
When the unit is brought from the cold into a warm environment
internal condensation may appear. The unit has to be warmed up
for up to two hours to regain full operational capacity.
Visibility decreased or disappeared
Bright light sources (the Moon, projectors or headlights) may
cause visibility to degrade or even completely disappear. Move
the device away from the light source immediately. The image
will be restored within two minutes.
Adverse atmospheric conditions such as fog, haze or extremely
dark environments will decrease visibility.

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7. WARRANTY
NEWCON warrants this product against defects in materials and
workmanship for one year from the date of the original purchase.
Longer warranty is available, subject to the terms of the specific
sales contract. Should your Newcon product prove to be
defective during this period, please deliver the product securely
packaged in its original container or an equivalent, along with the
proof of the original purchase date, to your Newcon Dealer.
Newcon will repair (or, at its option, replace with the same or
comparable model), the product or part thereof, which, on
inspection by Newcon, is found to be defective in materials or
workmanship.
What This Warranty Does Not Cover:
NEWCON is not responsible for warranty service should the
product fail as a result of improper maintenance, misuse, abuse,
improper installation, neglect, damage caused by disasters such
as fire, flooding, lightning, improper power supply, or service
other than by a NEWCON Authorized Service.
Postage, insurance and shipping costs incurred while presenting
your NEWCON product for warranty service are your
responsibility.