HP Z800 Sp632up SP632UPABA manual Service considerations, ESD information, Generating static

Service considerations

Review the following service considerations before replacing system components.

Cautions, warnings and safety precautions

Review the cautions, warnings, and safety precautions before accessing the workstation components. Also, review the Safety and Regulatory Guide that came with the workstation for more information.

ESD information

Generating static

The following table shows that different activities generate different amounts of static electricity through electrostatic discharge (ESD). Static electricity increases as humidity decreases.

		Relative humidity
Event	55%	40%	10%
Walking across carpet	7,500V	15,000V	35,000V
Walking across vinyl floor	3,000V	5,000V	12,000V
Motions of bench worker	400V	800V	6,000V
Removing bubble pack from PCB	7,000V	20,000V	26,500V
Packing PCBs in foam-lined box	5,000V	11,000V	21,000V

CAUTION: Static electricity in the amount of 700 volts might degrade a product.

64 Chapter 5 Replacing components ENWW