H3C S12500G-AF Series, Installation Manual

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2-3
Table2-1 Temperature requirements
Temperature Range
Operating temperature 0°C to 40°C (32°F to 104°F)
Storage temperature –40°C to +70°C (–40°F to +158°F)
Humidity
Maintain appropriate humidity in your equipment room, as described in Table2-2 .
•
Lasting high relative humidity can cause poor insulation, electricity leakage, mechanical
property change of materials, and metal corrosion.
•
Lasting low relative humidity can cause washer contraction and ESD and cause problems
including loose mounting screws and circuit failure.
Table2-2 Humidity requirements
Humidity Range
Operating humidity 5% to 95%, noncondensing
Storage humidity 5% to 95%, noncondensing
Cleanliness
Dust buildup on the chassis might result in electrostatic adsorption, which causes poor contact of
metal components and contact points. In the worst case, electrostatic adsorption can cause
communication failure.
Table2-1 Dust concentration limits in the equipment room
Substance Particle diameter Concentration limit
Dust particles
≥ 0.5 µm ≤ 3.5 × 10 6
particles/m
3
Dust particles
≥ 5 µm ≤ 3 × 10 4
particles/m
3
Dust (suspension)
≤ 75 µm ≤ 0.2 mg/m 3
Dust (sedimentation) 75 µm to 150 µm
≤ 1.5 mg/(m 2
h)
Corrosive gases can accelerate corrosion and aging of components. Make sure the corrosive gases
in the equipment room do not exceed the concentration limits as shown in
Table2-2 .
Table2-2 Corrosive gas concentration limits in the equipment room
Gas Average concentration (mg/m
3
) Maximum concentration (mg/m
3
)
SO
2
0.3 1.0
H
2
S 0.1 0.5
Cl
2
0.1 0.3
HCI 0.1 0.5
HF 0.01 0.03
NH
3
1.0 3.0