HP Z200 HP Z200 SFF Workstation Maintenance and Service Guide - Page 73

Service considerations, Cautions, warnings and safety precautions, ESD information, Generating static

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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 computer components. Also, review the Safety and Regulatory Guide that came with the computer 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 Walking across vinyl floor Motions of bench worker 7,500V 3,000V 400V 15,000V 5,000V 800V 35,000V 12,000V 6,000V Removing bubble pack from PCB Packing PCBs in foam-lined box 7,000V 5,000V 20,000V 11,000V 26,500V 21,000V CAUTION: Static electricity in the amount of 700 volts might degrade a product. ENWW Service considerations 61

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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 computer components.
Also, review the
Safety and Regulatory Guide
that came with the computer 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
Walking across vinyl floor
Motions of bench worker
7,500V
3,000V
400V
15,000V
5,000V
800V
35,000V
12,000V
6,000V
Removing bubble pack from PCB
Packing PCBs in foam-lined box
7,000V
5,000V
20,000V
11,000V
26,500V
21,000V
CAUTION:
Static electricity in the amount of 700 volts might degrade a product.
ENWW
Service considerations
61