Maintaining The Esd Wrist Strap; Using Electrostatic Discharge Prevention Procedures - Extreme Networks Summit WM Maintenance Manual

Maintaining the Summit WM Controller

Maintaining the ESD wrist strap

The ESD wrist strap and cord must operate properly to guard against ESD damage and electrical
shocks. The wrist strap and cord assembly has a 1-megohm resistor; if the resistor fails, there is no ESD
protection.
NOTE
Check the wrist strap weekly to ensure proper ESD protection.
To test the ESD wrist strap using a DMM:
1 Set the ohmmeter to 2-megohm resistance (see Figure 19).
2 Connect the DMM black lead to the alligator clip at the end of the cord.
3 Contact the DMM red lead to the plate on the inner surface of the wrist strap.
4 Check the resistance reading on the meter. The meter reading must be between 0.80 and 1.20 mega
ohms.
5 Replace the wrist strap and cord assembly if the reading is not within the allowable range.
Figure 19: ESD Wrist Strap and Cord Assembly

Using electrostatic discharge prevention procedures

Always follow the electrostatic discharge (ESD) prevention procedure when you remove and replace
cards. Failure to follow the ESD prevention procedure can result in permanent or intermittent card
failures.
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Summit WM Maintenance Guide, Software Version 5.3