Patton electronic 4520 manual Preventing electrostatic discharge damage, General observations

Model 4520 & 4110 Series Getting Started Guide About this guide

Before opening the chassis, disconnect the telephone network cables to avoid contact with telephone line voltages.

Ultimate disposal of this equipment must be handled according to all applicable national laws and regulations.

Preventing electrostatic discharge damage

When starting to install interface cards place the interface card on its shielded plastic bag if you lay it on your bench.

Electrostatic Discharge (ESD) can damage equipment and impair electrical circuitry. It occurs when electronic printed circuit cards are improperly handled and can result in complete or intermit- tent failures. Do the following to prevent ESD:

•Always follow ESD prevention procedures when removing and replacing cards.

•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.

General observations

•Clean the case with a soft slightly moist anti-static cloth

•Place the unit on a flat surface and ensure free air circulation

•Avoid exposing the unit to direct sunlight and other heat sources

•Protect the unit from moisture, vapors, and aggressive liquids

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