NPZ 1PN91-2 User manual
ARTICLE PN9-2
Service manual
AL3.803.05 RE
2
3
Page
List of abbreviations 5
Description and operation of the article 6
. Purpose 6
.2 Performance features 6
.3 Composition of the article 7
.4 Design and operation 9
.5 Design and operation of the components of the article 9
.6 Measuring tools, tools and accessories 0
.7 Designation and seals
.8 Package 2
2 Equipment limitations 2
3 Preoperation instructions 3
3. General instructions 3
3.2 Setting of the article in action position 4
3.3 Checking and adjusting of the aiming circle 4
4 Operation of the article 6
4. General instructions 6
4.2 Defining of the direction angles of oriented directions 6
4.3 Defining of the angles reading from the reference direction 7
assigned with regard to the North-South direction
4.4 Measuring of the horizontal angles between two objects 7
with the help of the reticle
4.5 Measuring of the vertical angles between two objects 8
with the help of the reticle
4.6 Measuring of the horizontal angles between two objects 8
with the help of the angle measuring device
4.7 Measuring of the vertical angles between two objects 8
with the help of the angle measuring device
4.8 Article orientation 8
4.9 Measuring of the distance to the target 9
4.0 Preparation for carrying 9
4
5 Maintenance 20
5. General instructions 20
5.2 Safety measures 22
5.3 Maintenance procedure 22
5.4 Preservation (depreservation, represervation) 26
6 Repair article in service 28
6. General instructions 28
6.2 Troubleshooting 28
7 Storage of the article 30
8 Transportation of the article 3
Appendix A List of figures 32
5
The Service Manual is intended for studying of the design and operating
rules of the article PN9-2.
The Service Manual contains information about the purpose, performance
features, information about design and operation of the article PN9-2 which
are necessary for correct running of the article and full usage of its technical
capacities. It also comprises the list of the most probable consequences of
failures and damages, as well as the methods of their elimination. Storage rules,
requirements to transportation and information about operation of the article
PN9-2 are also given in the Service Manual.
While studying the article PN9-2, it is necessary to use the following
documentation:
AL3.803.05 FO “Article PN9-2. Logbook”;
AL4.799.00 RE “Charge unit set. Service manual”
List of abbreviations:
NNI – natural night illumination
DM – daily maintenance
STA – spare parts, tools and accessories
CI – control inspection
OCC – ordinary climatic conditions
M.- – maintenance procedure N
M.-h – storage maintenance procedure N
M.-2 – maintenance procedure N2
M.-2h – long storage maintenance procedure N2
IIT – image intensifier tube
ERD – radiodevices
6
.. The night distant observation device (index PN9-2), the article PN9-2
(hereinafter referred to as the article) is designed for battlefield observation,
target recognition and adjustment of shooting at night.
It is possible to carry out the following operations with the help of the
article: measuring of horizontal and vertical angles, defining azimuth and target
angle of elevation, measuring distance to the target if its dimensions (height
or direction) are known.
..2 The article operates in ambient air range from -50 to +50 °C and relative
humidity at 00% at temperature +25 °C.
.2. The main performance features must correspond to the table .
Table
Name Value
Magnification, x 6.5
Angular field of view in the objects area 5.5°
Exit pupil diameter, mm 4.75
Eye relief, mm 50
Ocular setting range, diopter from – 4 to + 4
Angle-of-adjustment range:
for target position, etc. from – 3-00 to 3-00
for horizontal, etc. from 0 to 60-00
Limb scale factor:
rough reading, etc. -00
fine reading, etc. 0-0
Focusing range, m from 50 to ∞
Maximum voltage, mA:
for sighting device consumption 40
for illuminator consumption 40
Power batteries voltage, V:
two accumulators NLTs-0.9- 2.4
two batteries R6 (AA) 3.0
element ТHL-36 3.6
7
Continuation of the table
Name Value
Minimum continuous operation time of the vie-
wfinder, the switch handle being in the position ,
without changing power supplies, h
at temperature:
from 0 to +50 °C 0
from 0 to -40 °C 3
-50 °C 0.5
Maximum time needed to get the article ready for the
battle operation after power is switched on, sec
4
The sighting device maximum weight, kg 3
Maximum weight of the set in action position, kg 8
Maximum weight of the set in stowed position, kg 3
Overall dimensions of the sighting device, mm:
height 64
length 35
width 30
Overall dimensions of the case, mm:
height 200
length 707
width 400
.2.2 The following types of batteries are used for power supply of the
article:
- two accumulators NLTs-0,9-;
- one element ТHL-36;
- two batteries R6 (AA).
.3. The delivery set must correspond to the table 2.
Table 2
Code Item Qty Note
AL5.8.035 Sighting device Without NLTs-0.9-
AL5.89.09 Angle measuring device
G42.4.067 Tripod
8
Continuation of the table 2
Code Item Qty Note
Spare parts
Accumulator NLTs-0.9- 8 Are delivered
discharged
AL6.25.04 Bushing 2 *
AL6.548.035 Eyeshield
AL8.634.062 Cap
Element ТHL-36 2*
Battery R6 (AA) 4 *
AL8.896.023 Spanner
AL4.799.00 Charge unit
AL5.00.062 Battery tester YК-36
AL5.42.667 Illuminator Without NLTs-0.9-
AL6.274.84 Diaphragm On AL5.8.035
AL6.354.592 Handle
AL6.832.05 Soft cover For AL5.8.035
AL8.890.00-0 Napkin 2
AL8.98.272 Screw
AL4.62.00 Case
AL6.830.084 Carrying bag For AL4.799.00
AL6.832.86 Soft cover For G42.4.067
Ya27М.0.000 Suspension system For AL4.62.00
AL3.803.05 RE Service manual
AL3.803.05 FО Logbook
AL4.799.00 RE Charge unit set.
Service manual
* Is delivered if mentioned in the supply contract.
* The definite element of standard size R6 (AA) is delivered according to the
agreement with the customer.
9
.4. The main components of the article are the sighting device 3 (Figure A.2),
the illuminator 2, the handle for fastening the illuminator on the sighting
device for carrying the sighting device, the tripod 5 on which angle measuring
device 4 with the sighting device are fastened.
.4.2 The operation principle of the sighting device is based on the electro-
optical intensification of the image brightness of the objects (targets) at night
to such degree which is sufficient for eye observation.
.4.3 The sighting device operation at night is provided by the IIT A2 (Figure A.) of
heightened sensibility with micro channel intensification and automatic adjustment
of the screen brightness. The image of objects with little brightness is projected to
the photocathode of the IIT A2 by the objective , the IIT is located in the focal plane
of the objective .
The object image with intensified brightness on the screen of the IIT A2 is
transferred to the plane of the reticle 3 by the erector 2 and is viewed together
with the reticle 3 through the ocular 4.
.4.4 The figure A.6 shows the field of view of the sighting device (each
angle dimension between the lines presents one-thousandths part of the real
distance).
.4.5 When the switch SA (Figure A.) is switched on, 2.0 – 3.6 V voltage is
given to the IIT from the power supply G and G2.
.5. The sighting device3 (Figure A.2) consists of the following parts:
– the objective (Figure A.3) which is intended for projecting image of the
observed aim of little brightness to the photocathode of the IIT A2 (Figure A.);
– the ocular 8 (Figure A.3) which is intended for observation of the object.
.5.2 The sighting device has the following controls:
– the handle 2 which is intended for switching on the sighting device and
for switching on the reticle illumination;
– the diopter ocular setting ring 5 which allows to adjust the ocular according
to the diopters of the observer;
– the handwheel 2 which is intended for obtaining sharp image of the
observed object at the corresponding distance and for the compensation of
defocusing when the temperature changes from +50 to –50 °C.
.5.3 The tripod 5 (Figure A.2) is intended for fixing the sighting device 3 with
the angle measuring device 4 on the ground while working with the sighting
device in lying or sitting position.
Adjusting of the tripod height is carried out with the help of the telescopic
supports (Figure A.4), whose position is fixed with the help of the nuts 2.
The strap 3 is intended for tightening of the legs 4 during transportation.
When stored and transported in the case, the tripod is put into the soft cover 7
(Figure A.9).
0
.5.4 The angle measuring device 4 (Figure A.2) is intended for the
following:
– setting of the sighting device 3 on the tripod and its horizontal and vertical
aiming at the object of observation;
– orientation of the sighting device with the help of the aiming circle
corresponding to the direction of the magnetic meridian (North-South);
– measuring of the horizontal, vertical and direction angles.
.5.5 The angle measuring device has the following parts and controls:
– the handwheel 8 (Figure A.4) for the sighting device aiming in the horizontal
plane. The value of the horizontal angles is read on the scale 7 while observing
through the lens 5;
– the handwheel 3 for the sighting device aiming in the vertical plane. The
value of the vertical angles is read on the scale through the lens 2.
The measure limit for the vertical angles is ± 3-00. The black figures of the
scales correspond to the positive angles, the red scales – to the negative ones;
– the round level 6 controls setting of the angle measuring device in regard
to the horizon;
– the aiming circle 4 defines the magnetic meridian (North-South)
position;
– the handle 6 releases the scale 7 from fixation and sets any reading on it;
– the handle 9 fixes the location of the sighting device on the seat 0 of the
angle measuring device;
– the screws 8 and 9 fix the aiming circle position during adjusting;
– the handwheel 7 fixes the needle of the aiming circle 4.
.6. The spanner 7 (Figure A.9) is intended for screwing out the ring 2
(Figure A.5) which fixes the cap of the illuminator 6 switch (Figure A.9), for
screwing out the screws 0 (Figure A.3) and 3 mechanisms for direction and
height adjustment and for screwing out the screws 7, 8 (Figure A.4) during
adjusting the aiming circle.
.6.2 The charge unit (Figure A.9) is intended for charging of the accumulators
NLTs-0.9-. When transported, is it put into the bag 8 (Figure A.9).
.6.3 The illuminator 6 is intended for mutual orientation of two observers,
as well as for illumination of the scales 7 and (Figure A.4) and of the needle
of the aiming circle 4.
.6.4 The bushing (Figure A.9) is intended for setting into the sighting
device 3 (Figure A.2) and into the illuminator 6 (Figure A.9) together with the
element ТHL-36 2.
.6.5 The napkin 0 is intended for cleaning external surface of the optical
elements.
.6.6 The soft cover 5 is intended for protection of the sighting device mounted
on the tripod from dust, precipitation and during breaks in operation.
.6.7 The diaphragm 4 is intended for protection of the sighting device 3
objective (Figure A.2) from damage during transportation.
.6.8 The handle 3 (Figure A.9) is intended for fastening the illuminator 2
(Figure A.2) on the sighting device 3 and for carrying the sighting device.
.6.9 The screw 9 (Figure A.9) is intended for fastening the handle (Figure A.2)
on the sighting device 3.
.6.0 The battery tester YК-36 5 (Figure A.9) is intended for measuring of
the accumulators NLTs-0,9- 4 charge level.
.6. The soft cover 7 is intended for putting the tripod during its
transportation in the case.
.6.2 The suspension system 9 serves for transportation of the case
(Figure A.0) behind one’s back.
.6.3 The Landolt ring (its size is shown in the Figure A.7) serves for defining
illumination at the location at night. The Landolt ring is drawn on the shield of
thick cardboard (or thin plywood). The colour of the shield is white, the colour
of the ring is black.
The methods of illumination measuring includes the following:
– the illumination readings are taken every 5 minutes;
– the measures are carried out by two people – one is an operator, the other
is an observer. The observer’s position is at the place of testing. The operator
with the Landolt ring goes away from the observer in the direction of the target
for 5 – 20 m, then the operator turns in the direction of the observer. The
operator rotates the shield around the ring axis and stops it;
– the observer must define the direction of the open space in the ring. If the
observer defined it correctly, the operator goes further away from the observer.
If the observer made a mistake, the operator comes closer. The testing is carried
out again;
– the longest distance, at which the observer defined the direction of the
open space in the ring correctly, is defined. Then the illumination corresponding
the given distance is defined according to the chart in the Figure A.8.
.7. The following marking is done on the strip 3 (Figure A.3) of the
sighting device:
– index of the article PN9-2;
– article works number;
– trademark.
.7.2 The following marking is done on the front side of the case (Figure A.0)
and on the cap:
– index of the article PN9-2;
– article works number.
.7.3 The case is sealed.
2
.8. The case (Figure A.0) serves for storage and transportation of the
sighting device, single STA kit and maintenance documentation.
.8.2 Before putting the components of the article into the case, it is necessary
to do the following:
– put the diaphragm 4 (Figure A.9) on the objective of the sighting device
(Figure A.3);
– put the tripod 5 (Figure 2) into the soft cover 7 (Figure A.9);
– put the charge unit into the bag 8.
.8.3 It is possible to carry the case in two ways:
– in hands;
– behind one’s back.
For carrying the case behind one’s back it is necessary to do the following:
– take the suspension system 9 out of the case;
– fasten the safety hooks of the suspension system on the staples of the case.
.8.4 Seal the case together with the components of the article which were
put inside according to the nomenclature list as mentioned in the point .7.3
of the given Manual.
.8.5 Damage of the paint coat on the elements of the case locks is
possible.
2. Each time before work with the sighting device, check if the sighting
device is fastened to the tripod well enough and if the tripod is set on the
ground firmly.
2.2 Study the location at daytime for easier observation at night.
2.3 Protect the sighting device from shocks especially the parts having optical
elements.
2.4 Do not touch the optical elements with hands. Dust and dirt from the
optical elements is cleaned with the help of a clean napkin 0 (Figure A.9) from
the single STA kit.
2.5 Do not apply excessive power while working with the handwheels of the
sighting device and of the angle measuring device.
2.6 WHILE OPERATING THE ARTICLE, DO NOT:
– DISASSEMBLE THE ARTICLE;
– SWITCH THE SIGHTING DEVICE AT DAYTIME WITHOUT PUTTING
DIAPHRAGM 4 (Figure A.9) ON THE OBJECTIVE;
– AIM THE SIGHTING DEVICE WHICH IS SWITCHED ON AT BRIGHT SOURCES
OF LIGHT (LIGHTS, GLOWING HEADLIGHTS, ETC) EVEN IF THE DIAPHRAGM IS
PUT ON THE OBJECTIVE.
DAYLIGHT SPOILS THE SIGHTING DEVICE!
3
2.7 During breaks in work and in bad weather, it is necessary to put the soft
cover 5 on the sighting device.
2.8 If some bright glowing objects come into the field of view, it is necessary
to switch the sighting device off by turning the handle 2 (Figure A.3) to the
position marked by the red point.
2.9 Switch the sighting device off after finishing work.
2.0 Be sure if the sighting device 4 (Figure A.0), the angle measuring device 2,
the tripod 3 and the STA kit are put and fastened in the case correctly.
2. Do not connect the sighting device to other power supplies except the
accumulators 4 (Figure A.9), elements 2 or 3.
2.2 Do not place the sighting device near the sources of magnetic fields.
2.3 It is recommended to remove the accumulators from the sighting device
and from the illuminator and keep them in the pocket of the uniform before
and after working with the device. It is done in order to prevent accidental
switching on the power supply. When the temperatures are below zero, it also
allows to extend the time of the accumulators operation.
3.. While working with the sighting device under the conditions which
require the high degree of camouflage, fix the Eye shield 2 (Figure A.9) on it,
for that do the following:
– take the clamp 6 (Figure A.3) off the eye shield 7;
– dismount the eye shield 7;
– take the eye shield 2 (Figure A.9) from the single STA kit;
– put the eye shield 2 on the ocular ring, for that slightly spread the Eye
shield;
– put the clamp 6 on the Eye shield 2 (Figure A.3).
3..2 If there are no charged accumulators 4 (Figure A.9) available, use the
element 3 or the element 2 with the bushing as a power supply. Replace
them in the following way:
– switch the sighting device off;
– screw out the cap (Figure A.3) with the accumulators NLTs-0.9-;
– take the accumulators NLTs-0.9- out of the cup of the cap ;
– put the elements 3 (Figure A.9) or the element 2 with the bushing
inside the sighting device; mind the polarity indicated on the elements and on
the cup of the cap (Figure A.3);
– screw the cap up;
– switch on the sighting device, check the brightness of the IIT screen and
switch the sighting device off.
Replace the power supply of the illuminator shown in the figure A.5 in the
same way.
4
3..3 It is recommended to take the tripod 5 (Figure A.2) from the soft cover 7
(Figure A.9) and put the tripod and the soft cover into the case separately. This
is done for reducing the time of setting the article in action position.
3.2. For setting the article in action position at night it is necessary to do
the following:
– take the tripod 3 out of the case (Figure A.0);
– take the soft cover 7 (Figure A.9) off the tripod 3;
– set the tripod on the ground;
– take the angle measuring device 2 from the case (Figure A.0), set it into the ball
bearing of the tripod (Figure A.4), having slightly turned the thumbscrew 20 tight;
– level the angle measuring device in the ball bearing of the tripod till the
bubble of the round level 6 is placed in the center of the level vial. Finally,
screw the thumbscrew 20 tight;
– take the sighting device 4 (Figure A.0) from the case and mount it on
the seat 0 (Figure A.4) of the angle measuring device. Turn the handle 9 up
to the stop;
– screw the cap (Figure A.3) out of the sighting device, the lid 3 (Figure A.5) out
of the illuminator. Take four accumulators NLTs-0.9- 4 (Figure A.9) from the
case and set two accumulators in the cap (Figure A.3) and two accumulators
in the cap 3 (Figure A.5). Screw the lids into the sighting device and into the
illuminator;
– if it is necessary to carry out mutual orientation of two observers, take the
handle 3 (Figure A.9) and the screw 9 from the case. Fasten the handle with the
help of the screw through the hole A (Figure A.3) on the sighting device body.
Fix the illuminator 6 (Figure A.9) into the handle hole;
– switch on the sighting device by turning the handle 2 (Figure A.3) to the
position marked with the white point;
– set the diopter value necessary for the eye on the ocular scale by turning
the ring 5 of the ocular;
– take the diaphragm 4 (Figure A.9) off the sighting device objective;
– make the image of the object, which is observed, by turning the
handwheel 2 (Figure A.3);
– release the aiming circle by turning the handwheel 7 (Figure A.4).
3.2.2 Setting the article in action position in the daytime and at dusk must
be carried out in the same way as at night. The only difference is that the
diaphragm 4 (Figure A.9) is not taken off the sighting device objective.
3.3. Checking of the aiming circle includes checking coordination of the
aiming circle needle with the observing line of the device (checking aiming
circle according to the direction); checking deviation of the upper surface of
5
the needle from the plane with index (checking aiming circle according to
the height); checking of the deviation of the needle from the zero position
(checking of the standstill angle); checking of the decay time and number of
oscillations of the needle.
First, checking the aiming circle according to the direction and height is
done; then, the standstill angle, the standstill time and number of oscillations
of the needle are checked.
3.3.2 Before checking and adjusting of the aiming circle, it is necessary to
do the following:
– level the angle measuring device 4 (Figure 2) according to the round level 6
(Figure A.4) carefully;
– aim the observing line of the sighting device at the checkpoint the direction
of which (magnetic azimuth) is known beforehand;
– loosen the scale 7 by turning the handle 6 and set the reading on it corresponding
to the magnetic azimuth. Fix the scale 7 by turning the handle 6;
– set the reading 0-00 on the scale 7 by turning the handwheel 8. The
observing line of the sighting device is directed to the North.
3.3.3 If the aiming circle 4 needle does not coincide with the index, superpose
the needle with the index by turning the handwheel 8.
If the reading on the scale 7 is less than ±0-0, the aiming circle need not be
adjusted according to the direction.
If the reading on the scale 7 is more than ±0-0, it is necessary to do the
following:
– loosen the screws 8 (Figure A.4) and 9 with the help of the spanner 7
(Figure A.9) and turn the aiming circle 4 till the needle coincides with the
index. Fix the screws 8 and 9.
Check the coordination of the aiming circle according to the direction using
the methods given in the point 3.3.2.
3.3.4 If the needle of the aiming circle 4 does not coincide with the index
more than on 0.5 mm when the checking procedure from the point 3.3.3 is
carried out, it is necessary to do the following:
– loosen the screws 2 (Figure A.4) with the help of the spanner 7 (Figure A.9).
Superpose the needle with the index according to the height up to the value
of not less than 0.5 mm by turning the aiming circle in the vertical plane. Block
up the screws 2.
3.3.5 The standstill angle, the rest time and the number of oscillations of the
aiming circle needle are checked after the works described in the points 3.3.3
and 3.3.4. For this do the following:
– draw a small steel object to the aiming circle 4 case. The aiming circle
needle must deviate till touching the case side;
– draw the steel object away. The needle must oscillate at least 6 times and
stop oscillations maximum within 50 sec. After the oscillations, the aiming circle
needle must return to its original position (reading 0-00 on the scale 7);
6
– if the aiming circle needle does not return to the original position after
oscillations, superpose it with the index by turning the handwheel 8; take the
reading on the scale 7. The reading is the standstill angle of the aiming circle;
– if the obtained reading on the scale 7 differs more than on ±0-03, the
aiming circle must be sent to the maintenance organization.
4.. It is necessary to study the reconnoitered locality in the daytime for
efficient observation at night (if it is possible), as the image contrast and locality
and target colouring observed with the help of the article considerably differ
from the real ones.
4..2 Before operation, the article must be prepared according to the chapter
3 of the given Service Manual.
4.2. For defining of the direction angle of oriented direction it is necessary
to define the magnetic azimuth of the direction on the locality with the help
of the aiming circle. It is also necessary to calculate its direction angle taking
into account the aiming circle allowance. For this use the formula :
α = Am – ∆Am, ()
α – direction angle of oriented direction;
Am – mean value of the magnetic azimuth;
∆Am – the aiming circle allowance with its sign.
4.2.2 For defining the magnetic azimuth do the following:
– aim the observing line of the sighting device at the North with the help
of the aiming circle 4 by turning the handwheel 8 (Figure A.4) of the angle
measuring device;
– loosen the scale 7 by turning the handle 6. Set the reading 0-00 on the scale 7.
Fix the scale 7 with the help of the handle 6;
– superpose the cross of the sighting device reticle with the target by turning
the handwheel 8;
– take the reading on the scale 7.
4.2.3 For defining the allowance do the following:
– set the sighting device to the point (check point) from which two or three
objects with known direction angles are seen well;
– define the magnetic azimuth according to the point 4.2.2 of the given Service
Manual for each object not less then three times, put down the results;
– calculate arithmetic average value of the magnetic azimuth for each
oriented object;
– subtract corresponding value of the direction angles from the calculated
values. Evaluate the aiming circle allowance by taking the arithmetic average
from the obtained differences.
7
We know the direction angles of the directions: for the object N.
they are 8-69, for the object N.2 they are 4-37, for the object 3 they are 20 -2.
During checking by these objects, the magnetic azimuths shown in the table 3
were defined.
Table 3
Readings Numbers of objects
2 3
8-36 4-05 9-88
2 8-34 4-0 9-85
3 8-40 4-07 9-88
Arithmetic average 8-37 4-04 9-86
Define the difference between the average values of the magnetic azimuths
and corresponding direction angles:
Object N.: 8-37 – 8-69 = – 0-32
Object N.2: 4-04 – 4-37 = – 0-33
Object N.3: 9-86 – 20-2 = – 0-35
Define the aiming circle allowance:
The allowance which has been found is valid for the locality free of any
magnetic anomalies, within 20 km from the checking point to the East and
West; within 00 km to the South or North.
4.3. Aim the observing line of the sighting device at the North with the
help of the aiming circle 4 by turning the handwheel 8 (Figure A.4). Set the
reading 0-00 on the scale 7.
Set the value of the magnetic azimuth angle of the reference direction on
the scale 7 by turning the handwheel 8.
Loosen the scale 7 by turning the handle 6. Set the reading 30-00 on the
scale 7. Fix the scale 7 with the help of the handle 6.
4.4. Rotate the sighting device by turning the handwheel 8 (Figure A.4) for
superposing the vertical line of the cross of the sighting device reticle (the maximum
angle is 0-30) or any vertical line of the sighting device reticle (the angle being from
0-30 to 0-60) with one of the objects between which the angle is being measured.
∆β = - (32+33+35) = -0 - 33.
3
8
Count number of points of the reticle to the second object and approximately
define the point part.
Multiply the obtained number of the points together with the parts by the
value of one point 0-05.
The obtained result is the horizontal angle between the two objects.
4.5. Aim the horizontal line of the sighting device reticle or any line of the
vertical row at one of the objects by turning the handwheel 3 (Figure A.4) of
the target angle of elevation.
Count number of points of the reticle to the second object and approximately
define the point part.
Multiply the received number of the points together with the parts by the
value of one point 0-05.
4.6. Aim the cross of the sighting device reticle at one of the objects by
turning the handwheel 8 (Figure A.4). Take the reading on the scale 7 using
vernier counting method and write it down.
Aim the cross of the sighting device reticle at the other object by turning
the handwheel 8, take the reading on the scale 7. Subtract the smaller angle
value from the larger one.
4.7. Aim the horizontal line of the cross at one of the objects by turning the
handwheel 3. Take the reading on the scale using vernier counting method.
Take the reading to the second object by turning the handwheel 3.
If the index is against the black figures of the scale , the angle is positive,
if it is against the red ones, it is negative.
Add absolute values of the obtained results if the measured angles have
different signs. If their signs are the same, subtract the smaller result from the
larger one.
4.8. Article orientation at the observation post according to the direction
angle is carried out in the following way:
– aim the observing line of the sighting device at the checkpoint which has
the known direction angle by turning the handwheel 8 (Figure A.4);
– set the reading on the scale 7 equal to the direction angle to the
checkpoint.
9
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. 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.
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.
4.0. 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
20
– take the batteries from the cup of the cap and put them into the case;
– screw up the cap ;
– take the handle (Figure A.2) off the sighting device 3, having screwed off
the screw A (Figure A.3) and put it into the case;
– put the diaphragm 4 (Figure A.9) on the sighting device;
– turn the handle 9 (Figure A.4);
– take the sighting device 3 (Figure A.2) from the holder 0 (Figure A.4) of
the tripod and put it into the case;
– loosen the thumbscrew 20, take the angle measuring device 4 (Figure A.2)
out of the ball bearing of the tripod 5 (Figure A.2);
– slide the supports (Figure A.4) inside, fasten them with the help of the nuts 2,
tighten them with the strap 3;
– put the tripod 5 (Figure A.2) into the soft cover 7 (Figure A.9) and into
the case.
5.. It is necessary to carry out maintenance works of the article in time for
maintaining it in constant alertness, for providing reliability in operation, for
increasing interrepair time as well as for timely revealing and liquidation of the
reasons causing premature wear and damage of the assemblies and elements
of the article.
During operation the following types of servicing are provided for the article:
– maintenance works in the period of operation;
– maintenance works during short-term storage;
– maintenance works during long-term storage.
5..2 When the article is delivered to the military unit, its technical state is
checked according to the table 4.
5..3 Maintenance works in the period of operation include the following
types of servicing:
– CI;
– DM;
– M.-;
– M.-2.
5..3. CI is carried out for checking technical state of the article and for
eliminating the revealed defects.
CI is carried out by the staff who are responsible for the article. CI must be
carried out before combat, march, exercises or maneuvers with the help of the
tools and outfit from the single STA kit.
CI includes the works described in the table 4.
5..3.2 DM is carried out for preparing the article to operation.
DM is carried out by the staff who are responsible for the article. DM
must be carried out after combating, marching, exercising, maneuvering and
transporting with the help of the tools and outfit from the single STA kit.
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