Electrical Safety; Esd Damage Prevention - H3C S12500 Installation Instructions Manual

Electrical Safety

Look carefully for possible hazards in your work area, such as ungrounded power extension cables,
missing safety grounds, and moist floors.
Locate the emergency power-off switch in the room before installation. Shut the power off at once
in case accident occurs.
Unplug all the external cables (including power cords) before moving the chassis.
Better not maintain the equipment alone when it has been powered.
Never assume but check each time that power has been disconnected from a circuit.

ESD Damage Prevention

To prevent the electronic components from being damaged by the electrostatic discharge (ESD), you
should not only take ESD measures where the switch is located, but also take the following precautions:
Always wear an ESD-preventive wrist strap when installing components, especially the electronic
printed circuit boards.
Hold the edges of the PCB when necessary. Do not touch any electronic components or printed
circuit.
Take the following steps to use the ESD-preventive wrist strap.
1) Wear the wrist strap on your wrist.
2) Lock the wrist strap tight around your wrist to keep good contact with the skin.
3) Insert the ESD-preventive wrist strap into the specially designed hole on the switch chassis or
attach it to the grounding screw of the chassis the alligator clips.
4) Make sure that the ESD-preventive wrist strap is well grounded.
For the sake of safety, check the resistance of the ESD-preventive wrist strap. The resistance reading
should be in the range of 1M to 10 M ohm between human body and the ground.
Handling Safety
Since the S12500 series are rather large and heavy, you should follow the recommendations below:
Remove all the external cables (including power cords) before moving the chassis.
Move the switch slowly and stably. Keep in step with your partners and balance your bodies when
moving the switch.
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