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TM 750-116
d. Panoramic Telescope, M115 (fig. 3-72).
(1) Counter Box Assembly.
(a) Remove counter box inlet port cap and outlet
port cap.
(b) Perform purging procedure para 2-5.c.
(c) Purge instrument at 5 psig for 5 minutes.
Figure 3-72 M115 Panoramic Telescope
(2) Optical Assembly.
(a) Remove optical system inlet port cap and outlet
screw.
(b) Perform purging and charging procedure para
2-5.b.
(c) Purge instrument at 5 psig for 5 minutes.
(d) Charge instrument at 1 psig for 10 seconds.
(e) Leak test for minimum of 5 minutes.
e. Panoramic Telescope, M117/M117A1 (fig.
3-73).
(1) Counter Box.
(a)
port cap.
(b)
(c)
Remove counter box inlet port cap and outlet
Perform purging procedure para 2-5.c.
Purge instrument at 5 psig for 5 minutes.
Figure 3-73 M117/M117A2 Panoramic Telescope
(2) Optical System.
(a)
screw.
(b)
2-5.b.
(c)
(d)
(e)
Remove optical system inlet port cap and outlet
Perform purging and charging procedure para
Purge instrument at 5 psig for 5 minutes.
Charge instrument at 1 psig for 10 seconds.
Leak test for minimum of 5 minutes.
3-30
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