Chemical
active material
Unit Concentration
NH
3
mg/m
3
≤1.00
Cl
2
mg/m
3
≤0.10
HCl
mg/m
3
≤0.10
HF
mg/m
3
≤0.01
O
3
mg/m
3
≤0.05
Take the following measures to meet the requirements:
● Avoid constructing the room near a place where the corrosive gas
concentration is high, such as a chemical plant.
● Ensure the air intake vent of the room is in the prevailing upwind direction
from any pollution source.
● Place batteries in dierent rooms.
● A professional service should monitor the corrosive gas conditions regularly.
Requirements for ESD Prevention
The absolute value of electrostatic voltage must be less than 1000 V.
Take the following measures to meet this requirement:
● Train operators about ESD prevention.
● Keep the correct humidity level in the equipment room to reduce the impact
of static electricity.
● Lay out an ESD
oor in equipment rooms.
● Wear ESD shoes and clothing before entering equipment room.
● Use ESD tools, such as wrist straps, tweezers, and pullers.
● Ground all conductive materials in the room, including computer terminals.
Use ESD worktables.
● Keep non-ESD materials (such as common bags, foam, and rubber) at least
30 cm (11.81 in.) away from boards and ESD-sensitive components.
Electromagnetism Requirements for the Equipment Room
All interference sources, inside or outside the equipment room, can cause
equipment problems with capacitive coupling, inductive coupling, electromagnetic
wave radiation, and common impedance (including grounding system) coupling.
Prevent the interference using these approaches:
● Take
eective measures against electrical interference from the power supply
system.
● Do not use the working ground of the equipment as the same ground for
surge protection. Separate them as far as possible.
HUAWEI NetEngine 8000 F
Hardware Guide 4 Hardware Installation and Parts Replacement
Issue 05 (2023-03-31) Copyright © Huawei Technologies Co., Ltd. 494
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