TM 91240-400-34&P
3-12.
FINAL INSPECTION INSTRUCTIONS (CONT).
PARALLAX INSPECTION AND ADJUSTMENT
1
Set parallax distance to 250 10 meters on
collimator projector (1) by rotating objective end
(2).
2
Remove setscrew (3).
3
Look through M139 elbow telescope (4). Screw
objective cell assembly (5) in or out until parallax
is 0.1 mil or less in the center of the field of view.
4
Install setscrew (3).
RETICLE PLUMB/COLLIMATION INSPECTION AND ADJUSTMENT
1
Set parallax distance to 250 + 10 meters on
collimator projector (1) by rotating objective end
(2).
2
Remove one of four setscrews (3) securing
reticle.
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