NPZ 1PN91-2, Руководство по обслуживанию

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.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.
1.7 Designation and seals
.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.