Palm Z22 - Manual (Page 324)

Palm ® Z22 Handheld 310
Uwaga
Intrinsic Safety Warning
Warning – Explosion Hazard
• Substitution of components may impair suitability for Class I, Division 2;
• When in hazardous location, turn off power before replacing or wiring modules, and,
• Do not disconnect equipment unless power has been switched off or the area is known to be non-
hazardous.
Static Electricity, ESD, and Your Palm ® Handheld
Electrostatic discharge (ESD) can cause damage to electronic devices if discharged into the device, so you
should take steps to avoid such an occurrence.
Description of ESD
Static electricity is an electrical charge caused by the buildup of excess electrons on the surface of a material.
To most people, static electricity and ESD are nothing more than annoyances. For example, after walking over
a carpet while scuffing your feet, building up electrons on your body, you may get a shock—the discharge
event—when you touch a metal doorknob. This little shock discharges the built-up static electricity.
ESD-susceptible equipment
Even a small amount of ESD can harm circuitry, so when working with electronic devices, take measures to
help protect your electronic devices, including your Palm
® handheld, from ESD harm. While Palm has built
protections against ESD into its products, ESD unfortunately exists and, unless neutralized, could build up to
levels that could harm your equipment. Any electronic device that contains an external entry point for
plugging in anything from cables to docking stations is susceptible to entry of ESD. Devices that you carry
with you, such as your handheld, build up ESD in a unique way because the static electricity that may have
built up on your body is automatically passed to the device. Then, when the device is connected to another
device such as a docking station, a discharge event can occur.