H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 15)

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For the temperature and humidity requirements of the wireless switch,
see Table 3 .
Table 3 Temperature/humidity requirements
Temperature Relative humidity
0°C to 45°C (32°F to 113°F) 5% to 95%, noncondensing
Cleanness
Dust buildup on the chassis may 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