User's Manual

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 from explosive, conductive, magnetically-permeable, and
corrosive
dust. Table 5-11 shows the requirement for dust concentration in the equipment room.
Table 5-11 Requirements for dust particles in the equipment room
Mechanical active
material
Unit Concentration
Dust particle
Particle /m
3
≤ 3x 10
4
(no visible dust accumulated
on a workbench in three
days)
Description
Dust particle diameter ≥ 5 µm
Suspending dust
mg/m
3
≤0.2
Precipitable dust
mg/m
2
·h
≤1.5
Description
l Suspending dust diameter ≤ 75 µm
l 75 µm ≤ precipitable dust diameter ≤ 150 µm
Take the following measures to meet the requirements:
l Use dustproof materials for ground, wall, and ceiling construction.
l Use screens on the door and windows facing outside. The outer windows should be dust-
proof.
l Clean the equipment room regularly and clean the air filter monthly.
l Wear shoe covers and ESD clothes before entering the equipment room.
Requirements for Corrosive Gases
The room should be free from dusts and corrosive gases, such as SO
2
, H
2
S, and NH
3
. Table
5-12 shows the requirements for the corrosive gas concentration.
Table 5-12 Requirements for corrosive gas concentration
Chemical active
material Unit Concentration
SO
2
mg/m
3
≤0.20
Huawei Indoor Access Points
Hardware Installation and Maintenance Guide 5 Appendix
Issue 08 (2014-04-10) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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