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|  MIL-D-70484(AR)
3.5 Environmental conditions. The Display Unit shall operate
and meet the performance requirements of 3.4.3 under any of the
environmental conditions, or reasonable combination of these
conditions, as specified below:
3.5.1 Natural environments. The Display Unit shall be
capable of operation and storage in the worldwide environments as
specified below:
0-20,000 feet; nonoperating
3.5.1.1 Altitude. Operating:
and storage: 0-50,000 feet.
3.5.1.2 Temperature.
Display Unit.
Operating: -65 to +125F
a.
Nonoperating and storage: -65 to +160F
b.
Operation after exposure to 149F and
3.5.1.3 Humidity.
relative humidity to 95 percent.
3.5.1.4 Sand and dust. Operation after internal and external
exposure to sand and dust test.
3.5.1.5 Fungus. Operating, nonoperating and storage after
being subjected to fungus specified below:
Serial Number
Fungus
9642
Aspergillus niger
9643
Aspergillus flavus
11730
Aspergullus versicolor
11797
Penicillium fumculosum
6205
Chaetomum globosum
3.5.1.6 Explosive atmosphere. Operation in explosive vapor
within or surrounding the Operations Unit.
3.5.1.7 Service environment. The Display Unit shall be
designed and constructed to withstand the service environment as
specified in MIL-E-5400 for Class 1A equipment.
3.5.1.7.1 Vibration. The Display Unit shall not sustain
damage or subsequently fail to provide specified performance when
subjected to the vibration environment defined by MIL-E-5400,
Figure 2, (Sheet 1), Curve III.
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