Global Streams GlobeCaster, Руководство пользователя

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10
Et h er n et O ut p ut M od ul e
Electrostatic
Discharge
First and foremost! Before installing the Ethernet Output Module (or any
card) into your GlobeCaster, you must take a moment and read about
preventing electrostatic discharge (ESD). While this may seem redundant to
some, for others, this may be an important step.
Almost everyone is aware of static electricity and its effect when you rub
your feet on the carpet and touch another object. But did you know how
damaging static electricity can be to computer components?
For a human being to feel a static shock, the voltage must be around 1,500
volts. Really nasty shocks can be over 30,000 volts! Electronic components
can be damaged by much lower voltages, about 20-30 volts. Therefore, the
static electricity your body accumulates is enough to damage circuit boards
by merely touching them.
Sometimes ESD damage is not readily apparent, and can cause a board to
fail months after it was improperly handled. To avoid this type of failure,
please take the following steps when working inside your GlobeCaster:
1. Remove any articles of clothing that gather static electricity. Wool
sweaters are especially prone to this.
2. Work on the GlobeCaster in a reasonably ESD-free area. Don’t work on
the unit if it’s sitting on a shag carpet.
3. When working on the GlobeCaster, keep it turned off and unplugged.
4. Before touching any boards inside GlobeCaster, touch the edges of the
chassis
lightly
to discharge any static buildup you may have.
5. Handle only the boards you need to handle.
An ESD wrist strap can be found at most electronic supply houses, and
ensures that your body does not have any static charge. Having an ESD wrist
strap is recommended, but not required. Attach the alligator clip of the wrist
strap cord to the GlobeCaster chassis or another common ground point.
Having said this, it’s time to move on to installing your Ethernet Output
Module.