MIL-DTL-48550A
4.7.4 Operability. The collimator assembly shall be manually set up in the
operational position from the carrying position. This shall be a visual and tactile
examination of the collimator for conformance to the requirements specified in 3.7.4.
4.7.5 Knob travel. There shall be a tactile examination for movement of the knobs
to provide full locking and free movement of each specific component as specified in 3.7.5.
4.7.6 Knob locks. At +60°F to +90°F, the eight knobs of the collimator shall be
locked by application of "Torque to secure" values in Table I. There shall be no movement
of locked items when the specified "Test values" are applied in conformance with the
requirements of 3.7.6 and Table I. Torque and force values shall be applied with standard
measuring equipment. At the extreme operating temperatures of 3.4.2, the knob locks shall
be locked and unlocked by hand, without the use of any tools except gloves, to verify
compliance.
4.7.7 Telescope alignment. The torque required to rotate the scope to center the
level shall be measured with standard measuring equipment. The measured values shall
not exceed the valued specified in 3.7.7 for the temperatures indicated.
4.7.8 Azimuth fine adjustment knob.
4.7.8.1 Azimuth fine adjustment knob torque. The torque required to operate the
azimuth fine adjustment shall be measured with standard measuring equipment attached to
the fine adjustment knob. The measured torque values shall not exceed 5 inch pounds at
standard ambient temperature and shall not exceed 10 inch pounds when exposed to the
extreme temperatures, in accordance with the requirements of 3.7.8.1.
4.7.8.2 Azimuth fine adjustment knob durability. The durability test of the azimuth
fine adjustment at each travel stop position (in and out), shall be measured with standard
measuring equipment attached to the knob. At standard ambient temperature (60°F to
90°F), rotate the azimuth fine adjustment to the travel stop position, and then apply the
specified 25 to 30 inch pounds torque load to the knob. During this torque application
there shall be no evidence of knob rotation. Repeat at the opposite travel stop. Subsequent
to torque applications, the azimuth fine adjustment knob shall be manually rotated in and
out to each stop. During these rotations there shall be no tactile evidence of damage to the
threads as specified in 3.7.8.2
4.7.9 Fastening devices. All fastening devices used to secure the cover shall be
subjected to a visual and tactile examination to ensure conformance with the requirements
of 3.7.9.
4.7.10 Carrying handle. The carrying handle shall be inspected by a visual and
tactile examination initially to determine compliance with 3.7.10. The collimator assembly
shall then be subjected to being lifted by the carrying handle to a height of three feet from
the ground and returned, at least 50 full cycles. Subsequent to the lifting test, the handle
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