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MIL-M-70777 (AR)
4.5.5.3 Cold conditioning.  The lead cup assemblies to be
conditioned and functioned at cold temperature shall be prepared
as specified in 4.5.5.1.  They shall then be placed in a suitable
5F.  The rate of
chamber and the temperature decreased to -25
decrease shall not exceed 18F per minute.  The assemblies shall
be conditioned at temperature for two (2) hours minimum.  The
assemblies shall then be removed from the chamber and functioned
as specified in 4.5.5.4.  Set-up time between removal from the
chamber and firing shall be five (5) minutes maximum.
4.5.5.4 Functioning.  Each assembly prepared as specified in
4.5.5.1 and after applicable temperature conditioning shall have a
lead cup assembly (Dwg. 9298456) and detonating cord with booster
from an accepted lot assembled to the output side of the S&A
assembly.  It is not necessary to temperature condition the lead
cup or detonating cord assembly.  The space between the assemblies
shall be 0.20 inches minimum.  The booster end of the detonating
cord shall be taped to an aluminum plate (approximate dimensions
l 062" X 2" X 4 1/2").  The detonator shall be functioned behind an
approved barricade.  The detonator short shall be removed and the
detonator shall be initiated by a suitable power source (e.g.
6-volt battery).  If the lead assembly fails to initiate the
detonating cord for the minimum length specified in 3.4, as
evidenced by a witness mark on the aluminum plate, the lead
assembly shall be classed defective.  Any assembly in which the
detonator fails to fire shall be classed as a "no test" and a
replacement S&A assembly as specified in 4.5.5.1 shall be used in
its place.
4.5.6 Waterproofness test.  The transfer lead assemblies
shall be immersed in water at a depth of 2 inches minimum from the
surface of the water to the top of-the assemblies.  The water
10F.  After a
temperature shall be maintained at 70
minimum of 40 hours, the assemblies shall be removed from the
water and subjected to the output test specified in 4.5.4.  The
functioning test of all samples shall be completed within four
hours after the assemblies are removed from the water.
WARNING:  The above tests are conducted on assemblies containing
an explosive component.  Test barricades (where used), procedures
and equipment shall have prior approval of the contractor's safety
-
officer .
PACKAGING
5.
5.1 Preservation and packaging.
5.1.1 Level C.  The transfer lead assembly shall be preserved
and packaged in accordance with Dwg. 7548104.
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