Berger & Schroter 31539 User manual

5
(GB) Operating Instructions
Night Vision Device NV 9700 Premium 7 x M
Item no. 31539
1. Function
This night vision device is specifically and exclusively intended to enable vision in
darkness. Absorbed low levels of light are intensified, electronically converted, and
a visible image is facilitated by the use of specific technology. The night vision de-
vice can be used also in complete darkness because of this and the additional in-
frared light source.
The operating principles of the night vision device
Low levels of light are almost always present in any dark environment, particularly
outdoors; this could be because of meteorological conditions, astronomical pro-
cesses, reflection caused by constructions, water etc. The low levels of light are
absorbed by an objective lens (gathered) and reach the front part of a special in-
tensifier tube. Here, supported by extra power supply, the electrons which strike
the phosphorous screen are dislodged through the incidence of light. This causes
the screen to light up (which is why the image is always green), and an electronically
generated copy of the image, which has been projected by the lens, is generated.
The ocular lens located behind the phosphorous screen magnifies the image and
enables focusing according to individual eye-sight (dioptre adjustment). This feature
is installed for both of the ocular lenses. In addition, a connectable infrared light
source is available, which is an artificial source of light that is non-visible for the
human eye, but has brightening properties for the night vision equipment. Thus,
the device can be used also in complete darkness.

6
2. Safety notices and general instructions for usage – please follow!
Important notice! – This night vision device is equipped with a switch guard
for bright light exposure. We still kindly request you:
Never remove the lens cover during daytime or any other bright environment!
This could irreparably damage the sensitive intensifier tube. Thus, do not di-
rect the device towards strong sources of light in close proximity e.g. car
headlights, not even in darkness. Warranty claims are invalid for damages
such as these!
- Do not dismantle the device; it does not contain any parts that should be
replaced or repaired by you. Send the device to our customer service in the
case of defects or malfunctions.
- Protect the device from direct exposure to sunlight, dust, moisture and severe
temperature fluctuations. Do not store close to air conditioners, heaters or
passenger compartments of vehicles. Should the device show signs of
condensation (damp or wet exterior surfaces or glass) because of temperature
fluctuations e.g. quick change from cold to warm environment, leave it to dry
naturally for at least 5 hours – never use artificial means for drying.
- Do not expose the device to any mechanical charges, vibrations etc. Do not
drop it.
- Store device only in a clean, dry and well ventilated place. Remove the battery
from the device when it is not in use for an extended period of time (more
than 24 h).
- Keep the device away from children – it is not a toy.
- Clean the device using only a dry, soft cloth and only clean the lenses with
solutions intended for cleaning optical lenses.
4. Insert battery
- The device requires a CR123 lithium battery.
- Make sure the lens cover stays on during the entire procedure.
- Open the battery compartment by turning the battery compartment cover to the
left and insert the battery into the battery compartment correctly according to
the polarity markings.
- Make sure the on/off button is not accidentally pushed when changing the
battery. Insert the battery compartment cover again.
Observe the Batteries Directive!
Batteries must not be disposed of in household waste! According to the Batteries
Directive you are obliged to dispose of used or faulty batteries at the local collection
point or return them to your retailer.

7
Only put the object into service in dark environments and never remove the
lens cover in a bright environment.
Turning on/off
- Remove the lens cover in a dark environment.
- Turn the device on by pressing the on/off button.
- A red power indicator lights up on the ocular lens side.
- Turn on the infrared illuminator when needed by pressing the infrared button.
An additional rotary switch allows continuous brightness IR brightener. The
IR brightener can on the front control dial steplessly be focused.
- To turn it off, press the button again. The red power indicator turns off. It is
absolutely common for the light to persist on the display for a few minutes after
pressing the button.
- To avoid accidentally turning the device on in the carrier bag, it is recommended
to remove the battery after using the device.
Important notice!
Some light and dark spots could appear in the field of vision. The contrast of the
image reproduction decreases towards the image border. There could also be dis-
tortions at the image border. These occurrences are not errors, and arise from the
operating principles of the intensifier tube!
Focus
- Focus both ocular lenses to adapt them to your own eye-sight (dioptre
adjustment).
- Then turn the lens barrel to set the distance to the subject of observation.
6. Error notices
- The device is not activated when pressing the POWER button
- Make sure the battery has been inserted correctly and has sufficient power
supply.
- The image is too dark or does not appear at all
There is complete darkness. The device requires a minimum amount of light to
work. Turn on infrared illumination in addition. The device turned off because it
was directed at as source light which was too bright. Wait a few minutes and the
device will turn on again.
- It is not possible to focus
The objective lens and ocular lens are dirty. Clean the lenses. If you are still
unable to focus, contact our customer service.

88
7. Technical data
Generation of night vision device: ...................................................................... 1+
Magnification: ......................................................................................................7x
Objective lens: ..............................................................................................58 mm
Sensitivity: ................................................................................... 280 to 300 µA/lm
Angle of view: .......................................................................................................8°
Functional range: ........................................................... up to 500 m (at full moon)
Infrared brightener: ................................................... 120 mW, wavelength 805 nM
Power supply: ................................................................. 1 x CR123 lithium battery
Weight ...........................................................................................................1150 g
Dimensions (l x w x h): ...............................................................270 x 127 x 78 mm
Guarantee
We grant on this product a guarantee of 24 months, according to the pertinent statutory regulations,
from the date of the purchase by the initial user.
This guarantee covers all material or production defects; however, it does not cover the following:
Faults and defects resulting from normal wear, including wearing parts, seals etc.; damages or de-
fects arising or as a result of alteration.
We reserve the right to reject a guarantee claim if the purchase cannot be proven, or if the product
was improperly serviced or was obviously erroneously maintained (not or insufficiently maintained;
cleaning and servicing).
Please retain the proof of purchase documentation because this is valid as proof of date of purchase.
In case of a guarantee claim, the machine must be returned to the dealer in a clean state, and in its
original packaging if possible, and not disassembled in any way. Proof of purchase must also be in-
cluded.
EU Conformity Declaration
We hereby declare that the appliance described below as:
Night Vision Device NV 9700 Premium 7 x M, art.-no. 31539
is in compliance with the government EC-regulations and the mass production will be effected accor-
dingly:
2004/108/EC
The article is in compliance with the standards mentioned below which are basic conditions to obtain
the CE-mark:
EN 55022:2010; EN61000-3-2:2006+A1:2009+A2:2009
EN 55024:2010; EN61000-3-3:2008
Any change to the product and non-designated use will render this declaration in valid.
This declaration is made on behalf of the manufacturer/importer:
Berger & Schröter GmbH, Voerder Str. 7, 58135 Hagen, Germany
by: Eckhard Schröter, General Manager
Hagen, 09. 02. 2015
Copyright by
All rights reserved. It is not permitted without written approval from Berger + Schröter to reproduce these operating instructions. It is
also not permitted to reproduce extracts in any form that have been created or processed by use of electronic, mechanical or chemical
procedures. Technical changes can be made at any time without prior announcement. The operating instructions are corrected regu-
larly. We assume no liability for technical and typographical errors and their results.