ATN Mars 2 Operator's Manual page 54

vertically strict and the "M" dimension is provided for (Figure
C-2). Secure Subassembly (9) with nut (8). lock the nut with
primer coat.
9. Install the eyepiece. Secure it with primer coat.
8
10. eliminate the parallax between the crosshair plane and the
target plane and allow for less than 1º deflection from the paral-
lelism between the vertical reticle crosshair line and the plane
that crosses the observation line, vertical. You can achieve it
by moving Item (18) with Item (19) of Subassembly (9) (reticle
screw St.01.04.000.SB). Secure this new position with Screw
(20) (Figure C-5).
11. apply sealant to mount the Control Board Cover (7). lock the
Screws (6) with primer coat.
12. Check the air-tightness of the scope with application of 2x104
pa overpressure (0.2 atm). no pressure drop is acceptable (to
inflate air use hole for Screw (21).
13. purge the scope internal space with nitrogen of -50ºC dew
point. then lock Screw (21) with primer coat.
C-5
18
fIGURE c-5
20
19