Function Test In A Daytime; Use Of The Device During Dark Time - Dedal-NV 450 Operation Manual

Note.
The light intensity of the center of the reticle could be used as low battery
indicator. With IR illuminator switched on with full power and during reduction of
the electric potential under 1.9 V the brightness of the reticle decrease as
compared to the normal rate. If the electric potential continue to decrease the
reticle stop shine and the batteries must be changed to a new ones.
Note.
In order to ensure the longest operation time of the device and full power of the IR
illuminator (using one set of batteries) it is recommended to use batteries of
Alkaline system, possessing the most stable characteristics of a current
consumption when their power capacity is reduced.
In order to test operation of the device you can turn it on with the closed objective cover
in a daytime. Objective cover of has a small hole enough to test the operating condition
of the device. When the device is turned on the observed picture appears on the screen in
a yellow-green color.
Note.
The device won't burn out even if you open the cover of the objective. When the
light is excessively bright protection will be activated (automatic adjustment of
brightness) and the image will curtail. When the device is placed into a dark place
the image will be restored in several seconds.
Caution.
The device is not supposed to be directed to the bright sources of light: bright
lamps, the sun, welding and etc – it may result in the reduction of the coefficient of
brightness magnification of the device. In order to avoid the fatigue of photo-
cathode it is not allowed to leave the device motionless in a turned on condition in
the excessively bright environment (in the morning, in the evening, in a daytime)
for more than 30 minutes.
Your device Dedal-450 works from two batteries of AA
type. Be sure that the batteries are in good condition and they
are installed in accordance to the picture on the battery
compartment.
In order to replace batteries it is necessary to turn off a cover
of the battery compartment and replace old batteries with
new ones, keeping polarity of the batteries.

Function test in a daytime

Use of the device in a dark time
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