Carrier Access Access Navigator user manual Static-Sensitive Equipment Handling Procedures

Electrical Installation

Static-Sensitive Equipment Handling Procedures

Static-Sensitive Equipment Handling Procedures

WARNING! THE ACCESS NAVIGATOR CONTAINS CIRCUIT CARDS AND COMPO- NENTS THAT ARE SUBJECT TO DAMAGE BY ELECTROSTATIC DISCHARGE (ESD). ALWAYS USE THE FOLLOWING PROCEDURE WHENEVER HANDLING PLUG-IN CIRCUIT CARDS.

ESD can damage processors, circuit boards, and other electronic components. Always observe the following precautions before installing a system component.

The ESD warning label below appears on packages and storage bags that contain static-sensitive products and components.

1.Do not remove a component from its protective packaging until ready to install it.

2.Wear a wrist grounding strap and attach it to a metal part of the system unit before handling components. If a wrist strap is not available, maintain contact with the system unit throughout any procedure requiring ESD protection.

NOTE: A grounding wrist strap consists of an electrically conductive elastic wrist band with a grounding wire for connection to the equipment chassis or a common ground point.

3.To test the grounding wrist strap to ensure that it is working properly:

•Use ohmmeter to check resistance of grounding wrist strap.

•Connect one meter lead to wrist strap.

•Connect other meter lead to metal clip or banana plug at end of grounding wire.

•A resistance of one to ten megohms (million ohms) is typical and will provide adequate protection to equipment and user.

•DO NOT use the wrist strap if the resistance is more than 35 megohms because it will not protect the equipment from ESD damage.

•DO NOT use the wrist strap if the resistance is less than 0.75 megohms (750,000 ohms) because it will not protect you from high voltage shock hazards.

4.Before touching a circuit card, momentarily touch the grounded equipment rack or chassis to discharge any static buildup.

5.Before inserting or removing a circuit card from a storage bag, momentarily ground or hold the anti- static plastic storage bag to discharge any static buildup.

6.Do not touch any components or printed wiring on the circuit card. Hold the card by its edges or plastic handles.

Access Navigator - Release 1.8 August 2003 6-3