Huawei S2700 Hardware Installation And Maintenance Manual page 154

S2700&S3700&S5700&S6700 Switch
Hardware Installation and Maintenance Guide
Equipment Room Environment
Dust on devices may cause electrostatic discharge and result in poor contact for connectors or
metal connection points. This problem can shorten the life span of devices and cause faults.
The equipment room must be free from explosive, conductive, magnetically-permeable, and
corrosive dust.
room.
Table 13-28 Requirements for dust particles in the equipment room
Mechanical active
material
Dust particle
Suspending dust
Precipitable dust
Description
l Dust particle diameter ≥ 5 µm
l Suspending dust diameter ≤ 75 µm
l 75 µm ≤ precipitable dust diameter ≤ 150 µm
Take the following measures to meet the requirements:
l
l
l
l
Requirements for Corrosive Gases
The room should be free from dusts and corrosive gases, such as SO
13-29
Table 13-29 Requirements for corrosive gas concentration
Chemical active
material
SO
H
NO
Issue 13 (2017-11-20)
Table 13-28
Use dustproof materials for ground, wall, and ceiling construction.
Use screens on the door and windows facing outside. The outer windows should be dust-
proof.
Clean the equipment room regularly and clean the air filter monthly.
Wear shoe covers and ESD clothing before entering the equipment room.
lists the requirements for the corrosive gas concentration.
Unit
mg/m
2
S
mg/m
2
mg/m
x
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lists the requirement for dust concentration in the equipment
Unit
3
Particle /m
3
mg/m
2
mg/m ·h
Concentration
3 ≤0.30
≤0.10
3
≤0.50
3
13 Appendix
Concentration
4
≤ 3x 10
(no visible dust accumulated
on a workbench in three
days)
≤0.2
≤1.5
, H S, and NH . Table
2 2 3
146