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Temperature/humidity
Maintain the temperature and humidity in the equipment room in the acceptable ranges.
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.
•
High temperature can accelerate the aging of insulation materials and significantly lower the
reliability and lifespan of the switch.
For information about the temperature and humidity requirements, see HPE 5960 Switch Series
Hardware Information and Specifications.
Cleanliness
Dust buildup on the chassis might cause electrostatic adsorption and dust corrosion, resulting in
poor contact of metal connectors and contact points. This might shorten the device's lifetime and
even cause device failure in the worst case.
cleanliness.
Table1-1 Switch requirement for cleanliness
Substance
Dust particles
Corrosive gas limit
Corrosive gases can accelerate corrosion and aging of metal components. Make sure the corrosive
gases do not exceed the concentration limits as shown in Table1-2.
Table1-2 Corrosive gas concentration limits
Gas
SO
2
H
S
2
Cl
2
HCI
HF
NH
3
O
3
NO
X
EMI
All electromagnetic interference (EMI) sources, from outside or inside of the switch and application
system, adversely affect the switch in the following ways:
•
A conduction pattern of capacitance coupling.
Inductance coupling.
•
Particle diameter
≥ 0.5 µm
Average concentration (mg/m
0.3
0.1
0.1
0.1
0.01
1.0
0.05
0.5
2
Table1-1
describes the switch requirement for
Concentration limit
≤ 1.8 × 10
3
)
Maximum concentration (mg/m
1.0
0.5
0.3
0.5
0.03
3.0
0.1
1.0
7
particles/m
3
3
)
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