S12800 Routing Switch Installa
tion Manual V1.0
Maipu Confidential & Proprietary Information
Page 123
Max. Diameter (μm)
0.5
1
3
5
Max. density (tablets/m
3
)
1.4×10
7
7×10
5
2.4×10
5
1.3×10
5
If there is no visible dust on the desk within three days, it meets the cleanliness
requirement.
Apart from dust, the switch equipment room has the strict requirements for salts, acids, and
sulfides contained in the air, because these harmful gases speed up the eroding of metals and
the aging of some components.
We should prevent the harmful gases, such as SO2, H2S, NO2, NH3 and Cl2, from entering the
equipment room. The specific limited values are as shown in appendix table D-4:
Appendix table D-4 Limitations for the harmful gases in the equipment room
Gas
Max. (mg/m
3
)
SO
2
0.2
H
2
S
0.006
NO
2
0.2
NH
3
0.05
Cl
2
0.01
D. 1 . 7
An t i - i n t e r f e r e n c e Re q u i r e m e n t
The various interference sources no matter from the exterior of devices or application systems
or from the interior affect the devices through capacitance coupling, inductance coupling,
electromagnetic radiation, public impedance (including grounding system) and lead (such as
power lines, signal lines and output lines). Therefore, pay attention to the following:
Take valid anti-grid disturbance measures for the power system.
The working place of the switch had better not be used with the grounding settings of
power devices or lightning protection grounding settings and the distance between them
had better be as long as possible.
Be away from the strong power radio transmitters, radar transmitter, and high frequency
high-current equipment; take electromagnetic shielding methods when necessary.
