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MIL-C-24196A(SH)
4.6.7 Noise.  A noise test of the cleaning system shall be conducted in
accordance with the requirements of MIL-STD-740-1, grade B. The noise test
shall be witnessed by a Government representative.
4.6.8 Loaded cleaning.  A load test shall be performed as follows: A dummy
load of 1/2 to 1 inch stainless steel cubes shall be randomly (not oriented)
distributed directly on the bottom of the ultrasonic tank. The load shall be
at least 10 pounds of stainless steel per square foot of tank bottom. The
ceramic ring cleaning test specified in 4.6.5 shall be repeated above the
dummy load.  At least 50 percent of the ring surface shall be free of the black
graphite.
4.6.9 Dry run.  The ultrasonic tank shall be intentionally allowed to
drain while the ultrasonic system is "ON".  The unit shall run dry for 5
minutes without damage to the transducers or generator and upon refilling shall
resume satisfactory operation.
4.6.10 Impact.  This test shall be conducted with no liquid in the tank.
A 2-pound steel ball shall be dropped five times from 18 inches above the tank
bottom to randomly selected locations on the tank bottom.  Cleaning efficiency
shall not be impaired.  As a result of this test, tank rupture and deformation
shall be cause for rejection.
4.6.11 Electromagnetic interference control.
The system shall be tested
in accordance with MIL-STD-461.
4.6.13 Transducer bonding nondestructive.  A nondestructive test shall
be conducted to ensure that a minimum of 96 percent of the mating surface of
the transducer stacks are metallically joined to the diaphragm plate.
4.6.14 Shock.  The cleaning system shall be tested for conformance to
the requirements specified in 3.3.10.
4.6.15 Vibration.  The cleaning system shall be tested for conformance
to the requirements specified in 3.3.11.
4.7 Reliability.  Reliability assurance program in accordance with
MIL-STD-781 and MIL-HDBK-217, shall be conducted to determine conformance to
the requirements specified in 3.10.
4.8 Maintainability.  In accordance with MIL-STD-470 and MIL-HDBK-472
maintainability evaluation of final system shall be performed before construc-
tion of production units to determine conformance to the requirements specified
in 3.11.
4.9 Inspection of packaging.  Sample packages and packs, and the inspection
of the preservation, packing and marking for shipment and storage shall be in
accordance with the requirements of section 5 and the documents specified therein.

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