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Table II. Conditioning temperature. |
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|  MIL-I-60281A
4.2.3.2 Residual magnetism. Each initiator shall be subjected to the test for excessive
residual magnetism as specified in 4.3.2. Failure of any initiator to comply with 3.4 shall be
cause for rejection of the initiator.
4.2.3.3 Functional tests. The following tests shall be performed by the Government.
4.2.3.3.1 Ballistics. Twenty-one units shall be tested to determine compliance with 3.6.
The units shall be temperature conditioned as provided in table II and 4.3.4.2. Failure of any
unit to comply with 3.6 shall be cause for rejection of the lot.
TABLE II. Conditioning temperature.
Temperature ( F)
Sample Size
60 to 70
7
65 to 75
7
195 to 205
7
4.2.3.3.2 Retest. There shall be no retests.
4.2.3.3.3 Test failure. If a test failure is attributable to an assignable cause, excluding
the test initiator, the original test results shall be discarded and that test reconducted.
4.3 Test methods and procedures.
4.3.1 Breakaway torque. The torque wrench set as specified in 3.3 shall be used in conjunction
with a fixture to determine the adequacy of the joints. The chamber shall be secured in an air
vise, and the torque shall be applied to the cap.
4.3.2 Residual magnetism. The assembly shall be tested for excessive residual magnetism
using an approved compass in an area free of local magnetic effects by placing the assembly 5
inches from the end at the same height as the compass, in the north-south horizontal position (cap
end at south) with the compass set in an east-west heading. The assembly shall be moved at a speed
no greater than 10 feet per minute past the compass for its entire length, rotated 90 degrees in
the horizontal position about its longitudinal axis, and moved slowly back past the compass. This
procedure shall be repeated for each 90 degree rotation of the assembly for four full passes.
4.3.3 Radiographic examination. All assembled initiators shall be radiographically examined
in accordance with MIL-STD-453, with the exception that an initiator assembly will be used for the
penetrameter. Any observable imperfections in components or assembly shall be cause for
rejection. The initiators shall be positioned for the most revealing exposure, with the long axis
of each assembly perpendicular to the rays of the X-ray machine. All initiators shall be
identified with serial numbers prior to X-ray examination. The serial numbers shall be in
consecutive order beginning withthe number 001 in each production lot. Any missing numbers are
to be identified on the X-rays. The initiators shall be arranged on trays or boards in consecutive
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