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Shear test of the barrier assembly |
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|  MIL-P-48189D-(AR)
4.5.4 Setback pin of S&A assembly, present and operative. The
S&A assembl y, less detonator lead cup assembl y, sealing ball s and
sealing washers, shall be tested using a fixture(s) which
incorporate the forces as specified in drawing 9298464. The test
shall be conducted in a sequence where the lesser force is applied
last. Any unit failing to meet either force requirement shall be
classified defective, suitably identified, and removed from the lot.
4.5.5 Shear test of the barrier assembly. The barrier assembly
shall be placed in an approved fixture and the load specified on
Drawing 9298476 shall be applied. any barrier assembly that
completely separates shall be classed defective. This test is
destructive . Units so tested shall not be returned to the lot.
4.5.6 Qualification test of electric detonator and lead cup
assembly lots. This qualification test shall be performed for that
combination of detonator serial lot and lead cup assembly serial lot
components to be used for this test shall be randomly selected from
the respective lots. All detonators selected for this test shall
remain shorted, (leads twisted) unit immediately prior to firing.
The components shall be assembled into S&A's comprised of housing,
center plate, gasket and detonator side plate.
(Sliders, springs,
barrier assemblies, and setback pin and spring are not required).
The S&A's shall meet applicable drawing requirements, including
those affecting the gap between the detonator and lead cup
assembly. Detonating cord assemblies from an accepted lot shall be
suitably attached next to the lead cup assembly with a .020 inch
minimum spacing between the two assemblies. The short shall then be
removed and the detonators shall be initiated from behind an
approved barricade using a suitable power source (a 100 microfarad
capacitor charged to 1.6 volts). Observation shall be made for
failure to initiate the detonating cord assembly. Approved
barricades shall be used for assembling and testing these
components . If the number of assemblies failing to initiate the
detonating cord exceeds the specified acceptance criteria, that lot
combination of detonators and lead cup assemblies shall be rejected
for use in the housing, timing and fuzing.
4.5.7
Sensor assembly.
4.5.7.1 Non-release of sensor assembly. The sensor assembly
less breakwire, retaining ring cover, and sealant, shall be placed
in a centrifuge and spun in an orientation to apply the force
specified in 3.4.1 along the direction of deployment. Any unit in
which the sleeve completely separates or begins to separate from the
case shall be classified defective and removed from the lot. This
test is non-destructive. Those units successfully completing this
test shall be used to make complete sensor assemblies.
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