Electrostatic Discharge Information; Generating Static; Preventing Electrostatic Damage To Equipment - HP EliteOne 800 G4 Maintenance & Service Manual

23-inch all-in-one business pc
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WARNING!
handled improperly. Do not disassemble, crush, puncture, short external contacts, dispose in water or fire, or
expose it to temperatures higher than 140ºF (60ºC). Do not attempt to recharge the battery.
NOTE:
Batteries, battery packs, and accumulators should not be disposed of together with the general
household waste. In order to forward them to recycling or proper disposal, please use the public collection
system or return them to HP, their authorized partners, or their agents.

Electrostatic discharge information

A sudden discharge of static electricity from your finger or other conductor can destroy static-sensitive
devices or microcircuitry. Often the spark is neither felt nor heard, but damage occurs. An electronic device
exposed to electrostatic discharge (ESD) may not appear to be affected at all and can work perfectly
throughout a normal cycle. The device may function normally for a while, but it has been degraded in the
internal layers, reducing its life expectancy.
Networks built into many integrated circuits provide some protection, but in many cases, the discharge
contains enough power to alter device parameters or melt silicon junctions.

Generating static

The following table shows that:
Different activities generate different amounts of static electricity.
Static electricity increases as humidity decreases.
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
These are then multi-packaged inside plastic tubes, trays, or Styrofoam.
NOTE:
700 volts can degrade a product.

Preventing electrostatic damage to equipment

Many electronic components are sensitive to ESD. Circuitry design and structure determine the degree of
sensitivity. The following packaging and grounding precautions are necessary to prevent damage to electric
components and accessories.
To avoid hand contact, transport products in static-safe containers such as tubes, bags, or boxes.
Protect all electrostatic parts and assemblies with conductive or approved containers or packaging.
This computer contains a lithium battery. There is a risk of fire and chemical burn if the battery is
Relative Humidity
55%
40%
7,500 V
15,000 V
3,000 V
5,000 V
400 V
800 V
400 V
700 V
2,000 V
4,000 V
3,500 V
5,000 V
7,000 V
20,000 V
5,000 V
11,000 V
Electrostatic discharge information
10%
35,000 V
12,000 V
6,000 V
2,000 V
11,500 V
14,500 V
26,500 V
21,000 V
15

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