DPtech LSW6600 Ethernet Switch Installation Manual V1.3
Copyright © Hangzhou DPtech Technologies Co. Ltd.
2-3
Table 2-2
Dust limit in the equipment room
Substance
Unit
Content
Dust
Particles/m³
≤
3
×
104
（
No visible dust on the
table top for three days
）
Note: Diameter of a dust particle
≥
5
μ
m
Besides the dust, there are rigorous limits on the harmful gases that can
accelerate the erosion and aging of metals, such as salts, acids, and
sulfides. Equipment room should prevent from harmful gases such as SO2
、
H2S
、
NH3
、
Cl2, as shown in Table 2-3.
Table 2-3
Limit of harmful gases in the equipment room
Gas
Maximum (mg/m3)
SO
2
0.2
H
2
S
0.006
NH
3
0.05
Cl
2
0.01
2.2.3
ESD requirements
Although the switch is designed to be electrostatic discharge (ESD)
preventive, the card circuits and even the device can be badly damaged
when excessive static electricity is present. To get much better ESD effect,
you should:
Connect your device to the earth ground properly.
Keep the equipment room as clean as possible.
Maintain adequate temperature and humidity.
Wear an ESD-preventive wrist strap and clothes when handling the
circuit board.
2.2.4
Anti-interference requirements
All interference sources, wherever they are from, impact the switch
negatively in the conducted emission patterns of capacitance coupling,
