HP ENVY x2 HP Envy x2 Maintenance and Service Guide IMPORTANT! This document i - Page 33

Preliminary replacement requirements, Removing DIPS from Styrofoam - 15 6

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Event Walking across carpet Walking across vinyl floor Motions of bench worker Removing DIPS from plastic tube Removing DIPS from vinyl tray Removing DIPS from Styrofoam Removing bubble pack from PCB Packing PCBs in foam-lined box Typical electrostatic voltage levels Relative humidity 10% 40% 35,000 V 15,000 V 12,000 V 5,000 V 6,000 V 800 V 2,000 V 700 V 11,500 V 4,000 V 14,500 V 5,000 V 26,500 V 20,000 V 21,000 V 11,000 V 55% 7,500 V 3,000 V 400 V 400 V 2,000 V 3,500 V 7,000 V 5,000 V Preliminary replacement requirements 25

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Typical electrostatic voltage levels
Relative humidity
Event
10%
40%
55%
Walking across carpet
35,000 V
15,000 V
7,500 V
Walking across vinyl floor
12,000 V
5,000 V
3,000 V
Motions of bench worker
6,000 V
800 V
400 V
Removing DIPS from plastic tube
2,000 V
700 V
400 V
Removing DIPS from vinyl tray
11,500 V
4,000 V
2,000 V
Removing DIPS from Styrofoam
14,500 V
5,000 V
3,500 V
Removing bubble pack from PCB
26,500 V
20,000 V
7,000 V
Packing PCBs in foam-lined box
21,000 V
11,000 V
5,000 V
Preliminary replacement requirements
25