Electrostatic Discharge (Esd) - Symantec NetBackup 5230 Maintenance Manual

Electrostatic discharge (ESD)

To check the voltage using the multimeter
1 Set the multimeter to the voltage position.
2
Connect one lead to a fixed place in the equipment room. You may need to
extend the lead cable. Use the other lead to measure each grounding point
inside the cabinet.
3 Given the measuring accuracy, the voltage that is measured at each grounding
point should range between 0 V and 5 V.
If the voltage measured at a grounding point is 0 V, the point is not grounded.
If the value larger than 5 V, check the grounding cable, the connecting terminal,
and the fastening screw at the grounding point. Make sure that all interfaces
are secure.
See "About equipment maintenance"
ESD can damage disk drives, boards, and other parts. We recommend that you
perform all procedures at an ESD workstation. If an ESD workstation is not available,
provide some ESD protection by wearing an antistatic wrist wrap. The wrist wrap
must be attached to chassis ground – any unpainted metal surface -- on the
appliance.
Always handle boards carefully. They can be sensitive to ESD. Hold boards only
by their edges. After removing a board from its protective wrapper or from the
appliance, place the board component side up on a grounded, static free surface.
Use a conductive foam pad if available but not the board wrapper. Do not slide
board over any surface.
See "Battery replacement"
Detailed safety and maintenance information
on page 45.
on page 54.
Electrostatic discharge (ESD)
52