Table 2-3 Harmful Gas Limits In The Equipment Room; Esd Prevention - H3C SecPath V100-S Installation Manual

Installation Manual
H3C SecPath V100-S Security Gateway
Besides, the equipment room should meet the rigorous limits on salt, acid and sulfide to
eliminate corrosion and premature aging of some parts, as shown in the following table.

Table 2-3 Harmful gas limits in the equipment room

SO
2
H S
2
NH
3
Cl
2

2.1.3 ESD Prevention

By design, the SecPath V100-S is ESD preventative; but excessive buildup of static
electricity can still damage the card circuitry and even the entire device.
On the communication network connected to the SecPath V100-S, static electricity is
primarily introduced from the outside electrical fields, such as the outdoor high-voltage
power cabling and lightning, and from the inside system, such as indoor environment,
floor material and the equipment frame. To avoid damage, ensure that:
The equipment is well connected to earth.
The equipment room is dust-proof.
Maintain adequate temperature and humidity.
Wear an ESD-preventive wrist strap and clothes when contacting the circuit board.
Place the removed circuit board upward on the ESD-preventive workbench, or into
a static shielded bag.
Hold the circuit board by its edge when observing or moving it, avoiding direct
contact with the elements on it.
2.1.4 Electromagnetic Compatibility
All interference sources, from the outside or from the inside of the device/application
system, adversely affect the SecPath V100-S in the conduction patterns of capacitance
coupling, inductance coupling, electromagnetic wave radiation, and common
impedance (including grounding system) coupling. To prevent the interference, do the
following:
Take effective measures against interference from the power grid.
Use a grounding system or lightning protection grounding different from that for the
power supply equipment and keep them as far as possible.
Keep the device far away from strong power wireless launchers, radar launchers
and high frequency and high-current equipment.
Use electromagnetic shielding when necessary.
Gas
2-2
Chapter 2 Installation Preparations
Maximum (mg/m
0.2
0.006
0.05
0.01
3
)