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TM 750-116
(1) Perform purging and charging procedure para
2-5.b.
(2) Purge instrument at 5 psig for 10 minutes.
(3) Charge instrument at 1 psig maintaining pressure
for 20 seconds.
(4) Leak test for minimum of 5 minutes.
c. Periscope, M32E1 Tank (figs. 3-20 through
3-22).
ENSURE THAT 1.5V-OFF-24V SWITCH
ON BOTTOM OF THE INFRARED BODY
ASSEMBLY IS SET TO OFF; THIS UNIT
CARRIES 16,000 VDC.
Do not purge and charge the infrared body
assembly in bright light; prolonged exposure
can cause damage to the image conversion
tube.
NOTE
Periscope must be removed from installed posi-
tion for purging and charging operations. Refer
to appendix A for listing of applicable public a-
(1) Head Assembly (fig. 3-20).
Figure 3-20 M32E1 Head Assembly
(a) Perform purging and charging procedure para
2-5.b.
(b) Purge instrument at 8 psig for 5 minutes.
(c) Charge instrument at 1 psig maintaining pressure
for 10 seconds.
(d) Leak test for minimum of 5 minutes.
3-9
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