MIL-DTL-48556B
correction counter knob to indicate "-50" on the correction counter. Observe the elevation
counter reading. The elevation counter reading shall increase by 50 mils within the limits
of 3.8.6. Repeat the above procedure with the elevation counter set to indicate 0000 mils,
200 mils, 400 mils, 600 mils, 800 mils, 1000 mils, 1200 mils, and 1400 mils elevation.
4.8.7 Correction counter setting effect on elevation level bubble. Observe the
position of the elevation level vial bubble of the quadrant at the positive and negative
corrections checked in 4.8.6. The position of the elevation level vial bubble of the quadrant
shall conform to the requirements specified when observed at these corrections. This test
may be done concurrently with 4.8.6.
4.9 Knob torque. The torque at standard ambient and the extreme operating
temperatures of the elevation and correction counter knobs shall be determined with a
standard torque measuring device utilizing appropriate adapters to fit the respective knobs.
The measured torque values shall be within the limits specified.
4.10 Counter numerals. At elevations of 200 mils depression ("9800" as read on
the elevation counter), 0000 mils, 200 mils, 400 mils, 600 mils, 800 mils, 1000 mils, 1200
mils, and 1400 mils, all readings shall be centered and a standard measuring scale shall be
used to determine numeral (digit) alignment within the linear value specified.
4.11 Level vial illumination. Place the instrument in a dark room. The observer
must become dark adapted. When this has been accomplished, switch on the quadrant light
and observe the level vial bubbles and markings at various light levels that simulate dusk
into darkness. These observations must meet the requirements specified.
4.12 Counter illumination. This test may be done concurrently with 4.11. Place the
instrument in a dark room. The observer must become dark adapted. When this has been
accomplished, switch on the quadrant light and observe the counter numerals and numeral
alignment at various light levels that simulate dusk into darkness. These observations must
meet the requirements specified.
4.13 Interchangeability. Quadrant interchangeability shall be verified by insertion,
seating, and subsequent removal of the maximum fit gage, 11747969, into the quadrant's
mating surface without binding.
4.14 Workmanship. Workmanship of the quadrant shall be confirmed in
accordance with the verifications of MIL-F-13926.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as
specified in the contract or order (see 6.2). When packaging of materiel is to be performed
by DoD or in-house contractor personnel, these personnel need to contact the responsible
packaging activity to ascertain packaging requirements. Packaging requirements are
maintained by the Inventory Control Point's packaging activities within the Military
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