NPZ 1PN91-2, Service Manual

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4.8.2 The orienting of the article for defining targets from the point of
conjugated observation is carried out by mutual aiming of the sighting devices
or according to the direction angle.
During orienting by mutual aiming of the sighting devices, the illuminators 2
(Figure A.2) set on the sighting devices are aimed at each other. The sighting
devices are located at different ends of the conjugated observation base. The
illuminator of the left observation point (point A) is switched on and the reading
30-00 is set by turning the handwheel 8. The reading 0-00 is set on the sighting
device of the right observation point (point B). After switching the illuminators
off, the sighting devices are oriented by mutual aiming, the limbs have zero to
the right on the base.
For orientation according to the direction angle, the sighting device is aimed
at the checkpoint, whose direction angle for the direction from the observation
point is known. The reading which corresponds to the direction angle from
the observation point to the checkpoint is set on the scale 7. When using this
method of orientation, bear in mind that reading of the angle on the target
corresponds to the direction angle of the direction from the observation point
to the given target.
4.9 Measuring of the distance to the target
4.9. Aim the sighting device at the target the size of which is known by
turning the handwheel 8 (Figure A.4) and the handwheel 3 of the measuring
device. Define the value of the angle, above which the width and the height of
the given target are seen, by the horizontal and vertical lines of the reticle.
Divide the known size of the target by the obtained angle, multiply the
result by 000.
Example: Side projection of a tank is seen at the angle of 0-0, the length
of the tank is 5 m. Define the distance to the tank:
The angle at which the target is seen can be measured using the reticle of the
sighting device or with the help of the scales 7 and of the angle measuring
device.
4.10 Preparation for carrying
4.0. For preparation for carrying the article do the following:
– take the illuminator 2 (Figure A.2) from the handle ;
– screw out the cap 3 (Figure A.5);
– take the batteries from the cup of the cap 3 and put them into the case;
– screw up the cap 3 into the illuminator and put it into the case;
– screw out the cap (Figure A.3);
D =
5 m
.
000 = 500 m.
0