MIL-PRF-45307C(AT)
4.6.2.6 Low temperature. To determine conformance to 3.4.6, the pump assembly shall
be installed in a chamber in a manner that will simulate service usage. The internal chamber
temperature shall be lowered to -65°F (-54°C), the storage temperature, and shall be maintained
for a period of 24 hours. The internal chamber temperature shall be adjusted to -25°F (-32°C),
the lowest temperature for which the pump assembly is designed to operate, and shall be
maintained until temperature stabilization (see 6.3.3) of the pump assembly is reached. When
raising or lowering the temperature of the chamber, the rate of temperature change during the test
shall not exceed 18°F (10°C) per minute. The pump assembly shall be subjected to the test
specified in 4.6.2.1. After testing, the pump shall be returned to 73 +18°F (23 +10°C) and
subjected to the test specified in 4.6.2.1 (see 4.2.1).
4.6.2.7 High temperature. To determine conformance to 3.4.7, the pump assembly shall
be installed in a chamber in a manner that will simulate service usage. The internal chamber
temperature shall be raised to 160°F (71°C) and shall be maintained for a period of 48 hours while
ensuring that the relative humidity is not in excess of 15%. The internal chamber temperature
shall be adjusted to 125°F (52°C), the highest operating temperature for which the pump
assembly is designed to operate, and shall be maintained until temperature stabilization of the
pump is reached (see 6.3.3). When raising or lowering the temperature of the chamber, the rate
of temperature change during the test shall not exceed 18°F (10°C) per minute. The pump shall
be subjected to the test specified in 4.6.2.1. After testing, pump shall be returned to 73 +18°F
(23 +10°C) and shall be subjected to the test specified in 4.6.2.1 (see 4.2.1).
4.6.2.8 Shock. To determine conformance to 3.4.8, the pump assembly shall be mounted
by normal mounting provisions to a shock machine capable of producing the shock pulse shown in
figure 1. Three sawtooth shocks of 40 g and time duration of 11 ms (see figure 1) in each
direction shall be applied along three mutually perpendicular axes of the pump (total of
18 shocks). After the shock test, the pump assembly shall be examined for evidence of damage or
deformation and performance degradation (see 4.2.1).
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