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|  MIL-F-8615D
4.5.16.4 Electromagnetic compatibility. The electrical equipment shall be
tested in accordance with MIL-STD-462 for Class A1 equipment. The minimum
test shall be in accordance with method CE03. Additional tests shall be
in accordance with the item specification.
4.5.16.5 Thermal protectors. Tests shall be conducted to demonstrate
that the thermal protectors are capable of repeated cycles of heating and
cooling without causing deterioration in their capability to operate in
accordance with specification requirements.
4.5.17 Water. Tests shall be accomplished to demonstrate as specified in
3.7.6 through 3.7.6.2 and tests as specified in 4.5. 17.1 through 4.5.17.3,
as applicable, in accordance with the item specification. The test require-
ments for components using bleed air or subject to externally applied water
shall be in accordance with the item specification.
4.5.17.1 Fuel-water mixture. The fuel for this test shall be without anti-
icing additives and may contain up to 30 percent aromatics. While maintain-
ing the fuel at 30 to 40C temperature, pump a fine spray of water into
the fuel (approximately 0.26 ml water per liter of fuel) while continuously
agitating the mixture. The atmosphere above the fuel shall be above 60 per-
cent relative humidity at the same temperature as the fuel in order to
minimize loss of water by evaporation. The entire quantity of the mixture
should be circulated through an agitating pumping system at least four times
for 2 hours. Three samples from different locations in the bulk of the mix-
ture shall be analyzed and shall indicate an average of at least 90 ppm up
to supersaturated level.
4.5.17.2 Above freezing test. The unit shall be functionally operated
using the above fuel mixture. The duration in time shall be 2 hours or
100 cycles of operation. There shall be no indication of incorrect opera-
tion, disruptive electric discharge or other failure. If the item speci-
fication does not require an icing test, this test may be accomplished
using plain water.
4.5.17.3 Icing test. While agitating or circulating the above fuel-water
mixture, begin atomizing water above the surface of the fuel at a rate of
approximately 100 ml per minute per square meter of fuel mixture surface.
Continue atomizing to insure at least 0.25 ml of water per liter of fuel.
During this time, circulate the fuel-water mixture through the component
while cooling the mixture to the test temperature. To avoid complete freeze-
up of the heat exchanger, the difference in the temperatures of the refri-
gerant and the fuel-water mixture should not exceed 6C at the test tempera-
ture. Immediately upon reaching the test temperature, begin the test run.
The component shall be functionally operated for a length of time and number
of cycles in accordance with the item specification. The test temperatures
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