H3C Technologies H3C SR6600 - Manual (Page 13)

3
Altitude
Table 3 Altitude requirements
Item Altitude
Operating altitude –60 m (–196.85 ft) to 4 km (2.49 miles)
Storage altitude –60 m (–196.85 ft) to 4.5 km (2.8 miles)
Cleanness
Dust buildup on the chassis might result in electrostatic adsorption, which causes poor contact of metal
components and contact points, especially when indoor relative humidity is low. In the worst case,
electrostatic adsorption can cause communication failure.
Table 4 Dust concentration limit in the equipment room
Substance Concentration limit (particles/m 3 )
Dust particles
≤ 3 x 10 4
(No visible dust on desk in three days)
NOTE:
Dust particle diameter ≥ 5 μm
The equipment room must also meet strict limits on salts, acids, and sulfides to eliminate corrosion and
premature aging of components, as shown in
Table 5 .
Table 5 Harmful gas limits in an equipment room
Gas Max. (mg/m 3 )
SO
2
0.2
H
2
S 0.006
NH
3
0.05
Cl
2
0.01
Cooling system
The H3C SR6604 and SR6608 routers adopt left to right airflow for heat dissipation.