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|  MIL-M-l3306A ( O r d )
positioned
4.7.6 Cant correction travel.- The mount shall be
s i n e p l a t e of 15 degrees. The knob shall be
on
a
e
rotated until the two indicates coincide. The reticle rotation shaft
slot shall be In a horizontal plane with respect to the indices as
measured by means of a dial indicator moved alOng the length of the
slot. The knob shall then be rotated in a clockwise direction
until the level vial bubble is centered. The sine plate shall then
be rotated 1$0 degrees and the mount placed upon it. The knob shall
then be turned in a counterclockwise direction until the level vial
bubble is centered. This will indicate that the 15 degrees clock-
wise and counterclockwise movement has been attained.
4.7.7 Backlash.- The mount shall be petitioned as specified
in 4.7.3. The level vial bubble shall be centered and the coupling
slot in a horizontal plane as determined by a dial indicator placed
in contact with the bottom of the slot and the reading noted. A
torque wrench of five pound inches shall then be attached to the
coupling
and rotated clockwise then counterclockwise to center.
T h ereading on the dial indicator shall be noted. The target~@&~ench
shall then be rotated counterclockwise then clockwise
center.
The reading on the dial indicator shall be noted. The difference
in readings shall not exceed 0.0087 inch, which is equivalent to
thirty minutes of arc in a circle of two Inches in diameter, which
is the diameter of the coupling.
4.7.8 Operability
A calibrated torque wrench and an adapter
shall be attached
to the cant correction knob . The measured value
of torque, as read directly on the torque wrench, shall not exceed
the limits specified when tested at room temperature and at the
extreme temperatures specified in 3.5.1.
4.7.9
Illumination.- A 3 volt source shall be applied to the
in a darkened area. When observed, the
instrument light assembly
level vial markings shall be plainly visible as specfied.
visually finspected p l i a n c e
be
or
com
with
Standard
MIL-STD-130.
PREPARATION FOR DELIVERY
5.
recking and mark
n accordance with SpecificationMIL-F-14619/P12729.
marking q h
The level of protection shall be as specified in the procurement
document
q
6.
NOTES
8
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