C2, TM 9-2350-230-12
TABLE 2-11. INSTALLATION, OPERATION, AND BORESIGHT PROCEDURE FOR CAL .SO
MACHINE GUN NIGHT VISION SIGHT (FIG. 2-29)
STEP
PROCEDURE
FIG/ITEM
INSTALLATION
1
Perform before operation preventive-maintenance checks and services
2
Unzip stowage bag and remove the night vision sight from retaining straps
13
3
Loosen four wing nuts, thumbscrews, and slide adapter bracket from
stowage bracket.
4
Slide adapter bracket into sight bracket and tighten lock levers
10,16
CAUTION: Never point the objective lens at the sun or other light source
of comparable brightness.
5
Open machine gun cover and slide sight w/adapter bracket onto receiver.
15,16
Close cover.
6
Tighten four thumb screws and secure with wing nuts.
11 and 12
7
Remove lens cap.
1
8
Remove battery cap. Install battery with positive end forward
7
OPERATION
WARNING: Keep eyeshield in contact with face to prevent emission of
visible glow from eyepiece.
9
6
10
Focus eyepiece by rotating focus ring until reticle pattern appears sharp
8
NOTE. Remember diopter scale setting for future quick focusing .
11
Unlock objective lens focus knob locking device
17
12
Focus objective lens with focus knob
2
13
Lock objective lens focus knob locking device, taking care not to disturb
17
focus knob setting.
14
Rotate azimuth and elevation knobs to adjust position of reticle pattern
3 and 4
NOTE. Each click of azimuth and elevation adjustment knobs represents
a 1/2 mil movement of the reticle. Total movement of either
knob is plus or minus 26 mils.
BORESIGHTING
15
Align cal..50 machine gun sights on a target at a distance of 150 meters.
16
Align reticle aiming reference dot on same target
18
AFTER OPERATION
17
6
18
Remove battery and install lens and battery caps
1,7
19
Remove sight and adapter bracket from gun and stow
13 and 14
2-46