TM 5-6675-328-14
The Model 390 optical wedge may be used to determine the amount of off-center error of a reticle or target in an
alinement scope or collimator. After attaching the wedge on an adjustable mirror mount, set the wedge dial to zero.
Mount the scoge to be tested on the test post, aline the reticle images, and rotate the scope 180. The amount of error is
determined by rotating the wedge dial until the reticles are again in alinement; reading the amount of error on the wedge
scale. Each graduation represents one arc second.
The micrometer check target is permanently mounted on the MTC tube and provides a means for checking optical
micrometers.
2-6.4 Preparation for Movement.
a.
Remove four lighting units from test post and alinement telescopes and store in case.
b.
Remove stellite mirrors and store in case.
c.
Remove stride level and store in case.
d.
Remove leveling mirror and base. Drain reservoir and store in case.
e.
Remove Model 81 Alinement Telescope and store in case.
f.
Remove Model 88-6 Mounting Base and store in case.
g.
Remove Model 381-1 Alinement Telescope and store in case.
h.
Remove target collimator and store in case.
i.
Disconnect power cord.
j.
Remove MTC and store in case.
k.
Fully lower test post.
l.
Tighten shipping screws located under granite base.
m. Place box level in storage case.
n.
Complete preparation for movement in accordance with paragraph 1-6.2.
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