Cleanliness - Ruijie Reyee RG-NBF6002M Installation Manual

Installation Guide
electricity generation. This static electricity can pose a danger to the circuits inside the equipment.

In a dry environment, static electricity is prone to occur and damage the internal circuits of the equipment.

High temperature environments can be detrimental to the equipment, leading to reduced performance and a
shorter service life. Prolonged exposure to elevated temperatures can expedite the equipment's aging
process.
Note
The ambient temperature and humidity of the equipment are measured 1.5 m (59.06 in.) above the floor and
0.4 m (15.75 in.) before the equipment rack when there is no protective plate in front or at the back of the rack.
2.2.5

Cleanliness

Dust poses a major threat to the running of the equipment. The buildup of dust on the equipment can result in
static electricity, causing poor contact between the metallic joints. Dust buildup is more likely to occur in
environments with low relative humidity, which not only impacts the service life of the equipment but also
increases the likelihood of communication failure. The following table shows the specifications for dust
concentration and particle size in the equipment room.
Table 2-1 Requirements for Dust
Particle Size
≥ 0.5 µm
≥ 5 µm
Apart from dust, the salt, acid, and sulfide in the air of the machine room must also meet strict requirements.
These harmful substances will accelerate metal corrosion and component aging. Therefore, the machine room
should be properly protected against the intrusion of harmful gases, such as sulfur dioxide, hydrogen sulfide,
nitrogen dioxide, and chlorine gas. The following table lists limits for harmful gases.
Table 2-2 Requirements for Gases
Gas
Sulfur dioxide (SO
Hydrogen sulfide (H
Nitrogen dioxide (NO
Chlorine gas (CI
Note
"Average" indicates the typical level of exposure over a one-week period. "Maximum" refers to the highest
allowable exposure level within a week, with this level being sustainable for no more than 30 minutes per day.
Unit
Particles/m
Particles/m
Average (mg/m
) 0.3
2
S) 0.1
2
) 0.5
2
) 0.1
2
3
3
3
)
18
Preparing for Installation
Concentration
≤ 3.5×10
6
≤ 3.5×10
4
3
Maximum (mg/m )
1.0
0.5
1.0
0.3