TM 9-1240-400-34&P
2-17.
M115 PANORAMIC TELESCOPE FINAL INSPECTION INSTRUCTIONS (CONT).
COLLIMATION (CONT)
4
Loosen three screws (9) and position
micrometer (10) so that index (11) points to "0".
Tighten three screws (9).
5
Loosen two screws (12) and position open sight
(8) to "0". Tighten two screws (12).
6
Check that deflection counter (13) registers 3200
mils. If not, go to step 7.
7
Remove cap (14) and insert screwdriver into
slotted key (15).
8
Push in and rotate screwdriver until deflection
counter registers 3200 mils.
9
Install cap (14).
10
Rotate reset counter knob (16) until reset
counter (17) registers 3200 mils.
PLUMB TRAVEL AND LINE OF SIGHT TRAVEL
1
Collimate telescope. Refer to page 2-69.
2
Suspend plumbline to one side of azimuth
testing fixture (1).
3
Rotate deflection knob (2) to sight onto
plumbline.
4
Install a parallax shield in eyepiece (3).
5
Place a mark on wall behind plumbline,
intersecting reticle line.
2-70
