MIL-PRF-12048E
exposure, adjust the chamber air temperature to 20 ± 1 °C and maintain until temperature
stabilization of test kit has been achieved. The test procedures cited in 4.5.1.3 and 4.5.1.4 shall be
conducted. In addition to the conformance criteria cited therein, the kit case and packing material
shall be examined for deterioration, brittleness, or cracking. Functional failure of the kit
components, case, or packing material, or inability to perform tests, or satisfy test precision
criteria shall constitute failure of this test.
4.5.2.4 Low Temperature - Operational. The test kit, with the container open, shall be
subjected to a low temperature environment of -25 ± 1 °C for a period of 4 hours. At the end of
this exposure, while still at -25 ± 1 °C, the test procedures cited in 4.5.1.3 and 4.5.1.4 shall be
conducted. In addition to the conformance criteria cited therein, functional failure of the kit
components, inability to perform the tests or satisfy test precision criteria shall constitute failure of
this test.
4.5.2.5 Water resistance. For the water resistant test, the kit shall be in its transit or storage
configuration. A water spray shall be directed through nozzles to cover the parting line between
sections of the container, hinge(s), and the carrying handle(s). The spray nozzle shall give
uniform water distribution and shall have a flow capacity of not less than 4 liters/minute (1
gallon/minute) at 207 kilopascals to 276 kPa (40 psi) water-line pressure and water temperature
between 4±1°C to 24±1°C. Fogging nozzles shall not be used. The spray shall be angled to each
of the surfaces so water strikes at an angle between 40° and 90° to the surfaces. Spray time on
each container surface shall not be less than 3 minutes continuous. At the conclusion of the test,
the container shall be examined visually for water leakage to its interior. Water leakage shall
constitute failure of the test.
4.5.3 Transportability.
4.5.3.1 Transportability. The kit shall be put in the transport mode and carried by four
persons for a distance of 50 meters (164.0 ft.). The kit shall then be raised, adjusted to level, and
locked into position. The contents shall then be examined for damaged items or items not
secured. All items shall be removed from their secured position and stacked on the working
surface or other convenient area. Components shall be re-packed, using the loading diagram as a
guide, the container returned to the transport mode, and carried by four persons for a distance of
50 meters. Upon completion of this test, the kit will be examined for damage to the container and
components. The inability to successfully carry the kit the specified distance, inability to repack
components per the loading diagram, changes in configuration, or difficulty to repack resulting
from improper fit, shall constitute failure of this test. Any permanent deformation, cracks, or
damaged items from any cause shall also constitute failure of this test.
4.5.3.2 Vibration. The kit shall endure 40 minutes of vibration in each of 3 axes. The test bed
shall produce a 2.5 cm (1.0 inch) double amplitude, orbital path, at 5 Hz minimum. Upon
completion of this test, each kit shall be examined for damage to the container and each
component and accessory. Damage or breakage of the container or any component of the kit
shall constitute failure of this test.
4.5.3.3 Shock. The kit shall be dropped on a 20 cm (8 inch) thick bed of dry sand, from a
height of 1.0 m (39 inches). The kit shall be dropped on the two edges along the length of the
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