Operation Manual

9. TROUBLESHOOTING
No lit screen
- Incorrectly installed Battery. Reinstall the battery observing the correct
polarity
- Greasy contacts of the battery or the battery house contacts. Clean the
contacts
Dimly lit screen
- Discharged battery. Charge or replace the battery
- Dirty contacts in the battery Compartment. Clean the contacts
The illuminator does not work
- Greasy contacts of the illuminator or of its attachment socket.
Clean the contacts
The scope does not work.
- Check that the batteries are installed properly.
- Check the charge of the batteries. Replace if they are weak. Do not use old
batteries with new ones.
The image does not appear in focus.
Bring the inspected object to the center of the image. Turning the objective
lens ring (7), and/or the eyepiece (2) adjust to achieve the clearest image on
the screen. Repeat the steps of focusing if necessary If the view still does
not seem in focus, clean the lenses; they could be foggy or dusty.
Unit flashes
It is normal for the unit to flash within the first 2 minutes of activation. If the
flashing continues afterwards the following is a possible cause: bright
environment (even with the cap closed!)
Condensation accumulates on the parts.
It is O.K. to use the scope in cold. However, when the unit is brought from
the cold into a warm environment, it has to warm up for up to 5 hours (not
minutes!). Only then it is allowed to turn it ON again.
Visibility decreases and / or disappears.
Bright light sources (moon, projectors or headlights) may cause visibility to
degrade or even completely disappear. Move the scope away from the light
source immediately.
• NS-156 is a safe product. However, normal safety procedures
must be utilized like with regular daytime riflescope.
• The reticles is always in one plane with the image of the target
which makes surveillance and aiming even more comfortable;
• Smooth adjustment of lighting brightness on the reticles enables
aimed fire at targets differently illuminated and also provides the
possibility to adjust the optimum level of reticles lighting that is
most comfortable for the viewer.
• A small-sized adjustment mechanism which is built-in the lens
allows vertical and horizontal adjustments of the reticule;
• The size of the battery compartment allows the use of optional
rechargeable batteries as well as standard AA batteries commonly
available;
• Weaver type mount on the sight;
• Soft rubberized eyepiece makes the viewing more comfortable.
Warning!
Having been exposed to low temperature, NS-156 should be kept in a
warm place during no less than 2 hours prior to switching on in a
warm room. NS-156 is intended for use within the range of
illumination from 5x10
-3
lux to 1 lux at ambient temperature from -
20°C (-4°F) to +40°C (104°F) and relative humidity no more than
80% at 20°C (68°F).