H3C MSR830 Series Installation Manual

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H3C MSR830 Series Installation Manual Manual pdf 10 page image

3ESD preventionCAUTION:Check the resistance of the ESD wrist strap for safety. The resistance reading must be in the rangeof 1 to 10 megohm (Mohm) between human body and the ground.To prevent electrostatic discharge (ESD), follow these guidelines:• Make sure the router and the floor are correctly grounded.• Take dust-proof measures for the equipment room.• Maintain the humidity and temperature at acceptable levels.• Always wear an ESD wrist strap and ESD clothing when touching a circuit board or transceivermodule.The router does not supply an ESD wrist strap. Prepare an ESD wrist strap yourself.To attach an ESD 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. Secure the wrist strap lock and the alligator clip lock together.4. Attach the alligator clip to the rack grounding terminal.5. Make sure the rack is correctly grounded.EMIElectromagnetic interference (EMI) might be coupled from the source to the router through thefollowing coupling mechanisms:• Capacitive coupling• Inductive coupling• Radiative coupling• Common impedance coupling• Conductive couplingTo prevent EMI, take the following actions:• Take measures against interference from the power grid.• Do not use the router together with the grounding equipment or lightning-prevention equipmentof power equipment, and keep the router far away from them.• Keep the router far away from high-power radio launchers, radars, and equipment with highfrequency or high current.• Use electromagnetic shielding when necessary.Lightning protectionTo better protect the router from lightning, do as follows:• Make sure the grounding cable of the chassis is correctly grounded.• Make sure the grounding terminal of the AC power receptacle is correctly grounded.• Install a lightning arrester at the input end of the power supply to enhance the lightningprotection capability of the power supply.