Datasheet

Preventing Electrostatic Discharge Damage

78-4519-04

Related Documentation

Warning

Before working on equipment that is connected to power lines, remove jewelry (including rings,

necklaces, and watches). Metal objects will heat up when connected to power and ground and can

cause serious burns or weld the metal object to the terminals. To see translations of the warnings that

appear in this publication, refer to the Regulatory Compliance and Safety Information document that

accompanied this device.

Follow these guidelines when working on equipment powered by electricity:

• Locate the emergency power-OFF switch in the room in which you are working. Then, if an

electrical accident occurs, you can quickly shut the power OFF.

• Disconnect all power before doing the following:

–

Installing or removing a chassis

–

Working near power supplies

• Do not work alone if potentially hazardous conditions exist.

• Never assume that power is disconnected from a circuit. Always check.

• Look carefully for possible hazards in your work area, such as moist floors, ungrounded power

extension cables, and missing safety grounds.

• If an electrical accident occurs, proceed as follows:

–

Use caution; do not become a victim yourself.

–

Turn OFF power to the system.

–

If possible, send another person to get medical aid. Otherwise, determine the condition of the

victim and then call for help.

–

Determine if the person needs rescue breathing or external cardiac compressions; then take

appropriate action.

Preventing Electrostatic Discharge Damage

Electrostatic discharge (ESD) can damage equipment and impair electrical circuitry. ESD occurs when

electronic printed circuit cards are improperly handled, and can result in complete or intermittent failures.

Always follow ESD prevention procedures when removing and replacing cards. Ensure that the chassis is

electrically connected to earth ground. Wear an ESD-preventive wrist strap, ensuring that it makes good skin

contact. Connect the clip to an unpainted surface of the chassis frame to safely channel unwanted ESD

voltages to ground. To properly guard against ESD damage and shocks, the wrist strap and cord must operate

effectively. If no wrist strap is available, ground yourself by touching the metal part of the chassis.

Caution For safety, periodically check the resistance value of the antistatic strap, which should be between 1 and

10 megohms (Mohm).