5.1.2.1 Altitude, non-operating. Equipment with
hermetic seals, and so forth, shall be designed so that it will not be damaged
when under transit in an unpressurized cargo bay of an aircraft at 4.6 km
(15,000 feet). It is to the discretion of the program manager if the equipment
is to be fully functional following an explosive decompression test. In
general, the rate of altitude change shall not exceed 10 meters per second
(2,000 feet/minute). Further guidance may be obtained from MIL-STD-810, method
500. Altitude tests shall be in accordance with IEC 68-2-13 or MIL-STD-810,
method 500.
5.1.2.2 DC magnetic field environment. Requirements for
magnetic fields shall be as specified herein.
5.1.2.2.1 Fully
hardened. Equipment shall operate in the magnetic field values in accordance
with DOD-STD-1399, section 070, part 1.
5.1.2.2.2 Minimal acceptance.
Equipment designated for installation on ships which contain degaussing or
mine neutralization equipment shall have requirements which are tailored to
meet DOD-STD-1399, section 070.
5.1.2.3 Electromagnetic
susceptibility. Equipment electromagnetic radiated and conducted
susceptibility requirements shall be as specified herein (see 5.1.3.5).
5.1.2.3.1 Fully hardened. Equipment susceptibility requirements shall
be in accordance with MIL-STD-461. Tailoring guidance for electromagnetic
susceptibility is provided in MIL-STD-461. Tests shall be in accordance with
MIL-STD-462.
5.1.2.3.2 Minimal acceptance. Equipment shall be capable of
operating in the presence of the expected conducted and radiated
electromagnetic environment (EME) in accordance with MIL-HDBK-235.
5.1.2.4 Dust and sand. Requirements for dust and sand shall be as
specified herein.
5.1.2.4.1 Fully hardened. Equipment shall withstand
dust and sand. Dust and sand tests shall be in accordance with MIL-STD-810,
method 510.
5.1.2.4.2 Minimal acceptance. Generally, requirements for
dust and sand are not applicable. Requirements for equipment operation in dust
and sand conditions shall be specified only for those installations determined
by the specifier to have excessive dust and sand conditions.
5.1.2.5
Greenwater loading. Requirements for greenwater loading shall be as specified
herein.
5.1.2.5.1 Fully hardened. Equipment parts exposed to
greenwater loading shall show no mechanical or electrical damage when the mean
greenwater load is 42 kilopascals (kPa) for surface ships, and 62 kPa for
submarines.
5.1.2.5.2 Minimal acceptance. Generally, requirements for
greenwater loading are not applicable. Requirements for equipment operation
under greenwater loading shall be specified only for those installations
determined by the specifier to be subject to greenwater loading.
5.1.2.6 Gun muzzle. Requirements for gun muzzle effects shall be as
specified herein.
5.1.2.6.1 Fully hardened. The equipment shall meet
the interface requirements in accordance with MIL-STD-1399, section 072, part
2.
5.1.2.6.2 Minimal acceptance. Generally, requirements for gun
muzzle effects are not applicable. Requirements for equipment operation under
gun muzzle effects shall be specified only for those installations determined
by the specifier to be subject to gun muzzle effects.
5.1.2.7
Humidity. Requirements for humidity shall be as specified herein. The
specified criteria for equipment installed in controlled spaces shall take
into account failure of the environmental control system for up to 8 hours
duration.
5.1.2.7.1 Fully hardened. Equipment shall be tested for
condensing humidity conditions in accordance with IEC 68-2-30Db or
MIL-STD-810, Method 507, to simulate shipping and storage conditions, and
where applicable, installation in an uncontrolled environment. The temperature
range in IEC 68-2-30Db shall be changed to "25 Centigrade (ºC) to 55ºC".
Equipment not subjected to testing in accordance with IEC 68-2-30Db or
MIL-STD-810 shall withstand 95 percent humidity (non-condensing) and tested in
accordance with IEC 68-2-3Ca. IEC 68-2-3Ca shall be modified to require 21
days testing.
5.1.2.7.2 Minimal acceptance. Equipment shall be capable
of operation in an environment conforming to the full range of requirements
for data processing spaces of the ASHRAE Handbook, and specifically, the
Heating, Ventilation, and Air Conditioning (HVAC) Systems and Application
Volume of the handbook.
5.1.2.8 Hydrostatic pressure. Requirements for
hydrostatic pressure shall be as specified herein.
5.1.2.8.1 Fully
hardened. Parts of the equipment that will be immersed in seawater shall
withstand the hydrostatic pressure without physical or electrical damage and
without leakage. Leakage immersion tests shall be in accordance with
MIL-STD-810, method 512.
5.1.2.8.2 Minimal acceptance. Generally,
requirements for hydrostatic pressure are not applicable. Requirements for
equipment operation under hydrostatic pressure shall be specified only for
those installations determined by the specifier to be subjected to immersion
in seawater.
5.1.2.9 Icing. Requirements for icing shall be as
specified herein.
5.1.2.9.1 Fully hardened. Exposed equipment shall
withstand an icing load of 20 kilograms per square meter. Icing tests shall be
in accordance with MIL-STD-810, method 521.
5.1.2.9.2 Minimal
acceptance. Generally, requirements for icing are not applicable. Requirements
for equipment operation under icing loads shall be specified only for those
installations determined by the specifier to be subject to icing.
5.1.2.10 Missile exhaust. Requirements for missile exhaust shall be
specified herein.
5.1.2.10.1 Fully hardened. The equipment shall meet
the interface requirements of MIL-STD-1399, section 072, part 1.
5.1.2.10.2 Minimal acceptance.
Generally, requirements for missile exhaust are not applicable. Requirements for equipment
operation under missile exhaust effects shall be specified only for those
installations determined by the specifier to be subject to missile exhaust.
