Humidity; Cleanliness - HP Aruba 6400 Series Installation And Getting Started Manual

Table 1: Temperature requirements
Temperature
Operating temperature
Storage temperature
For more environmental information, see Environmental, safety, and electrical information.

Humidity

Maintain the humidity in your equipment room in the acceptable range, as described below.
• 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 such as loose
mounting screws and circuit failure.
Table 2: Humidity requirements
Humidity
Operating humidity
Storage humidity

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.
Table 3: Dust concentration limit in the equipment room
Substance
Dust particles
NOTE: Dust particle diameter ≥ 5 μm
The equipment room must also meet limits on salts, acids, and sulfides to eliminate corrosion and
premature aging of components, as shown below.
Table 4: Harmful gas limits in the equipment room
Gas
SO
H
NH
Cl2
Chapter 3 Site preparation
Range
15% to 95% at 45C (104F), noncondensing
15% to 95% at 65C (149F), noncondensing
Concentration limit (particles/m3)
≤ 3 x 104 (No visible dust on desk in three
2
S
2
3
Range
0°C to 45°C (32°F to 113°F)
–40°C to +70°C (–40°F to +158°F)
days)
Max. (mg/m3)
0.2
0.006
0.05
0.01
15