Huawei NetEngine80E Installation Manual page 125

HUAWEI NetEngine80E Router
Installation Guide
Take the following measures to meet the requirements:
l
l
l
B.1.5 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 B-3 Requirements for dust particles in the equipment room
Mechanical active
material
Dust particle
Description
Dust particle diameter ≥ 5 µm
Suspending dust
Precipitable dust
Sand
Description
l Suspending dust diameter ≤ 75 µm
l 75 µm ≤ precipitable dust diameter ≤ 150 µm
l 150 µm ≤ sand diameter ≤ 1000 µm
Take the following measures to meet the requirements:
l
l
Issue 02 (2011-09-10)
NOTE
l The measurement point of the temperature and humidity is 1.5 m (4.92 ft) above the floor and 0.4 m
(1.31 ft) in the front of a cabinet. Before measuring the temperature and humidity, remove the protection
panels at the front or back of the cabinet.
l Short-term operation means that the continuous working time does not exceed 96 hours and the
accumulated time per year does not exceed 15 days.
Use a constant temperature-control device no matter what the local climate is.
Mop the floor regularly or use a humidifier to maintain proper humidity in the equipment
room in dry areas.
Use a dehumidifier if the humidity is high.
Table B-3 shows the requirement for dust concentration in the equipment room.
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.
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B Environmental Requirements for Device Operation
Unit
3
Particle /m
3
mg/m
2
mg/m ·h
3
mg/m
Concentration
4
≤ 3x 10
(no visible dust accumulated
on a workbench in three
days)
≤0.2
≤1.5
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