Huawei NE05E Hardware Manual page 392

HUAWEI NE05E,NE08E
Hardware Guide
Dust on the equipment may lead to electrostatic adherence, and consequently
result in poor connection between metal connectors or connecting points. This will
reduce the service life of the equipment, and even makes it faulty.
To ensure long-term and reliable equipment operating, reduce dust particles in the
equipment room.
Table 4-4
in the equipment room.
Table 4-4 Mechanical active substance
Mechanical Active Substance
Suspended dust
Deposited dust
Gravel
The equipment room shall be guarded against dust and corrosion by harmful
gases such as SO
shows the limits for them.
To meet the above requirements, take the following measures:
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Air cleanness requirements
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Issue 05 (2023-03-31)
shows the specifications for the density and diameter of dust particles
, H S, NH
2 2
Keep the equipment room far away from pollution sources and do not smoke
in the equipment room.
Seal the doors and windows.
Use dustproof materials for the floor, walls, and roof.
Install screen doors and screen windows. Ensure that the outer windows are
dustproof.
Always wear clean lab coat and protective footwear before getting into the
equipment room.
Cover the ceiling and walls of the equipment room with wallpapers or
lusterless paint (pulverized paint prohibited) to prevent dust flake-off.
The air is free from explosive, electric-conductive, magnetic-conductive, or
corrosive dust.
The concentrations of mechanically active substances meet the requirements
defined in the following table.
Mechanically Concentration
Active
Substance
Suspended dust
≤ 5.00 mg/m
Deposited dust
≤ 20.0 mg/(m
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4 Hardware Installation and Parts Replacement
Content
≤ 0.4 mg/m
≤ 15 mg/(m
≤ 300 mg/m
, NO , and CL . Corrosive Gas Control Requirements
3 2 2
3
2
·h)
3
2
·h)
3
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