ANHUA AOHB-8X User manual

1
AOHB-8X
3 Gen night vision binocular instrument
operation instructions

1
A. Model Name: AOHB
B. Product description
AOHB night vision goggle is lightweight, compact, rugged, single-tube multifunctional night vision
system. It utilizes a pseudo binocular design for added observation convenience. It has a built-in I R
light source for complete darkness conditions.
It is an exceptional choice for hands free (head-mounted and helmet-mounted) usage and ca n take
either CR123 lithium battery or AA battery to power this unit without any other accessories.
C. Kit includes
Night Vision Goggle, Flip-up head mount, Protective carrying bag, Instruction manual, Lens
cleaning cloth, Warranty card, Desiccant
D. Features
● IP67 weatherproof: The device can be submersible to 1m deep for one hour.
● Automatic shut off when flipped up: The device will turn off automatically when pushing a
button on the side of mount and lifting the unit up until reaches in the top position. Push the
same button to lower monocular to the viewing position, then the device will turn on for
continuation of operation.
● No power consumption when in standby: It means no power consumption in case you forget
to remove the battery for some days.
● Embedded spring in battery’s cap: It makes screwing the cap easier and better protect the
spring and contact with the battery.
● Optional battery type: One CR123 or two AA batteries can power this unit, no need any
accessories.
● Auto operating mode: In this mode, the IR illuminator will turn on automatically when the
ambient light is less than 0.05Lux and will turn off automatically when the ambient light is more
than 0.1Lux.
● Fully adjustable headcount: The headcount can be adjusted according to head size.
● Mil-spec multi-coated optic: Multi antireflection film can restrain the reflex of lens, which can
reduce the loss of light so more light can go through the lens to get a sharp image.
● Automatic brightness control: When the ambient light changes, the brightness of the image

2
detected will keep the same to ensure a stable viewing effect and also to protect users’ eyesight.
● Bright source protection: The device will shut off automatically in 10 seconds to avoid the
damage of the image intensifier tube when the ambient light exceeds 40 Lux.
● Low battery indication: A greenish light in the edge of eyepiece will start flickering when the
battery is running low.
F. Mechnical parts code and name
1. operation button
2. battery compartment
3. objective lens
4. protective cover
5. eyepiece
6. rubber eye cap
7. mounting part
8. IR illuminator
9. light detector
10. IR brightness regulator
G. Device operating instructions
1. Insert one CR123 or two AA batteries without any accessories according to the polarity
indications and battery type on the battery compartment (2) surface. Remark: Don’t use
CR123 and AA at the same time.
2. Remove the protective cover (4) when it’s used at night or in low light condition. NOTE: To

3
protect the image intensifier tube, keep the lens cap on the objective lens when the device
is not in use or when checked out in daylight conditions. You might test the device through
the pinhole in the center of protective cover (4) and the time can’t exceed 10 minutes.
3. Turn on the device by twisting operation button (1) and moving it to ON. After this, you can
start observing the scene through the eyepiece (5). The greenish-lit screen of the image
tube means that the device is working normally. A green light appears in the edge of
eyepiece at the same time and it serves as the power indicator as well as low battery
indicator. If the indicator light starts flickering, it means the battery is running low. It is the
time to change your battery. Activate the IR by twisting button (1) and moving it to IR when
the device is working in the conditions of extreme low light or total darkness, at the same
time, it starts focusing the light. A red light appears in the eyepiece and is emitted from IR
illuminator (9) to indicate that the IR illuminator is operating. Adjust the IR brightness by
twisting the button of IR brightness regulator (10) if necessary. When twisting the operation
button (1) to Auto, the IR illuminator will turn on automatically when the ambient light is
lower than 0.05Lux and it will turn off automatically when the ambient light exceeds 0.1Lux.
NOTE: The light from the illuminator can be detected by others that are using night vision
devices.
4. Focus the objective lens (3) by rotating the objective lens ring for sharper image of viewed
object. Adjust eyepiece (5) by rotating the eyepiece ring for sharper image of intensifier
screen. Repeat these two steps for 3 times, then you might gain the sharpest image.
5. The light detector (8) can detect the surrounding illuminance, the device will be shut off
automatically when the ambient light exceeds 40 Lux in 10 seconds.
6. When you finish observing, twist the operation button (1) and move it to OFF, then the
device stops working.
H. Flip up head mount installation
A. Fitting the head mount
Adjust the head mount first before attaching the NV unit to it.
7. Loosen all the straps and place the head mount on your head.
8. Fit the head mount to your head size and tighten all the straps.
9. And last you will need to fixate the chin strap with Velcro tape.
B. NV installation and adjustment
Now you are ready to mount the NV monocular onto head mount.
To mount the monocular to a head mount, perform the following:
1. Loosen the screw ( A ). Push down the button ( B ) and insert the mounting part ( E ) of the
night vision device into the socket of the head mount ( C ). Then tighten the screw (A) after
adjusting it to a good position you need. Now the device is fixated onto the head mount
firmly.
2. Place the head mount with goggle onto your head. (as Figure01 shows)
3. The monocular head mount has a flip-up mechanism. Push the button ( F ) on the side of
mount and lift the unit up unitl the unit reaches in the top position. When the device is
placed in the top/up position it will turn off automatically.

4
4. Push the same button ( F) to lower monocular to the viewing position. Turn the device on
for continuation of the operation.
Figure01
I. Precautions
1. Do not disassemble the unit.
2. It’s better to use device under +5℃to +40℃. After the unit usage in temperatures below
zero, wait at least 3 hours at room temperature, to avoid condensation accumulating on
the internal lens surfaces and the consequent fogging caused by extreme temperature
differences.
3. Keep the device in soft carrying bag, ventilated and dry place with temperature which does
not exceed +15℃. Keep away from heating device and avoid direct sunlight and high
humidity which does not exceed 70%.
4. NVD should be used in nighttime and can’t be aim at strong light. If you have to test it
during daytime, the front lens cap should never be removed. You can observe the target
through the hole in the protection cap.
5. Use good quality lithium battery or alkaline cell, as bad quality batteries will affect the
performance of the NVD and easily damage the device.
6. Try to avoid the rain and mist, and avoid dropping, shaking and collision.
7. Use clean soft cloth and dampened in alcohol, if necessary.
8. A useful tip is to remove the battery when the night vision will be not in use for over 3 days
to prevent battery leakage and damaging the device.
NOTE: It is normal that the device cannot be turned on when the ambient light exceeds 40
Lux. This device has protection system, which cuts off the image intensifier when ambient light
level exceeds the limit of 40 Lux during a 10 seconds period.
Failure to follow the above precautions may cause the unit damage and will void the
manufacturer’s warranty.
J. Troubleshooting
If the device does not turn on
1. Reinstall the battery with the correct polarity.
2. Replace battery.
3. Clean the battery compartment, focusing on the contact points.

5
The observed image flickers or flashes
This means there is too much light (e.g. observation during twilight conditions). Turn off the unit
or place the objective lens cover. The unit will function normally in light conditions not in
excess of 0.1Lx (full moon).
The image is missing or not focused
1. Re-focus the unit by adjusting objective lens. Adjust diopter setting by rotating eyepiece, if
necessary.
2. Check the cleanliness of the objective surface and eyepiece and clean if necessary.
3. Replace batteries.
4. In extreme low light conditions, activate the built-in IR illuminator.
Image disappeared or its quality worsened
1. Automatic shut off might occurred to protect the unit from excessive light. Attach the
objective lens cover and ensure that unit started to function normally. Turn the unit off and
wait until the conditions darken to continue observation.
2. Bright light sources (e.g. street lights) may cause visibility to decrease or disappear. Turn
the monocular away from the light source, visibility will restore itself in several minutes.
You see black dots on the screen
These dots are minor cosmetic blemishes resulting from the image intensifier production
processes and are not a sign of a defective or low-quality unit. These dots do not interfere
with the reliability and performance of the monocular.

6