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i. Panoramic Telescope, M981 FISTV (fig.
3-76). Refer to 3-16.h. for procedures.
3-17. Telescopes, Straight .
a. M90A2 Straight Telescope (fig. 3-77).
HANDLE WITH CARE. IN THE EVENT
THE RADIOLUMINOUS SOURCE IS
BROKEN, CRACKED, OR SUDDENLY
LOSES ILLUMINATION, DO NOT AT-
TEMPT TO REPAIR. IMMEDIATELY
DOUBLE WRAP INSTRUMENT IN PLAS-
TIC AND NOTIFY THE LOCAL RADI-
ATION PROTECTION OFFICER (RPO).
TM 750-116
b. M134 Straight Telescope (fig. 3-78).
NOTE
The telescope must be removed from the ve-
hicle or the vehicle storage area before begin-
ning purging procedures. Refer to appendix A
for a listing of applicable publications.
(1)
(2)
3-18.
3-79).
Figure 3-78 M134 Straight Telescope
Perform purging procedure para 2-5.d.
Purge instrument at 5 psig for 5 minutes.
T e st Set, Receiver/Transmitter (fig.
Figure 3-77 M90A2 Straight Telescope
(1) Perform purging and charging procedure para
2-5.a.
(2) Relief valve should open between 3-10 psig.
a.
(3) Purge instrument for 5 minutes.
b.
(4) Relief valve should close between 1-5 psig.
c.
(5) Leak test for a minimum of 5 minutes.
d.
Figure 3-79 Receiver/Transmitter Test Set
Perform purging and charging procedure para 2-5.b.
Purge instrument at 10 psig for 15 minutes.
Charge instrument at 1 psig for 10 minutes.
Leak test for minimum of 5 minutes.
3-33
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