Table 2-2 Requirement On Dust Content In The Equipment Room; Table 2-3 Limits On Harmful Gas Contents In The Equipment Room - H3C VG 31-08 Installation Manual

Installation Manual
H3C VG 31-08 Voice Gateway
2.1.2 Cleanliness
The equipment room must be free of explosive, electric, magnetic,
or corrosive dust. The contents of dust must be limited as shown in the
following table:

Table 2-2 Requirement on dust content in the equipment room

Max. particle size
(μm)
Max. concentration
(number of particles
per cubic meter)
Besides dust, there are rigorous limits on harmful gases that can
accelerate erosion and aging of metals, such as salts, acids, and
sulfides, as shown in the following table.

Table 2-3 Limits on harmful gas contents in the equipment room

Gas
SO
2
H S
2
NO
2
NH
3
Cl
2
Chapter 2 Installation Preparations
0.5
7
1.4×10
Average (mg/m
0.2
0
0.04
0.05
0.01
2-2
1 3
5
7×10 2.4×10
3
) Maximum (mg/m
1.5
0.03
0.15
0.15
0.3
5
5 5
1.3×10
3
)