Name: ESD 保護 (Understanding Electrostatic Discharge (ESD) for Technicians) ()
Uploaded: 2017-07-28T14:18:38.000Z
Duration: 4 min 59 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

and I'm here today to discuss electrostatic discharge.

未来進行形

In this video we're going to be going over three main topics:

what types of damage it can do to computer components,

is the sudden flow of static charge from one object with a higher charge

Have you ever rubbed your socks on a carpet,

and then touched your friend to shock them?

Or have  you ever been touching a doorknob or car door,

If you have, then you've experienced ESD.

The shock that you felt came from when the current on your body

In this case, the car door, door knob, or your friend that you shocked.

This same type of discharge can occur when working an in open computer,

There are two basic types of damage that ESD can cause to electronic components:

you can shock a component on the spot, causing it to quit functioning completely.

but at least you know the component has been destroyed and needs to be replaced.

With latent damage, you've only discharged enough electricity into the component to degrade it,

This type of damage can cause problems with the long term functionality of a component,

So now I'm going to give you a brief overview of the contents of the ESD field kit.

and it folds out to form an ESD workspace that is portable and can be used anywhere.

You use this to ground yourself to the workspace,

to ground yourself and the machine you're working on.

You're going to use this when you want to ground yourself to the bare metal of a chassis.

You're going to use this to ground  yourself to the alligator clip,

The part of the wrist strap that actually grounds you is this metal piece right here

so you're going to want to make sure that it's tight to your skin at all times.

This connects the wrist strap to the mat,

The kit you have may differ from the one that I just showed,

but the grounding methods for every kit will be the same.

The mat and strap are your first line of defense against ESD,

but there are a few other considerations to take into account.

You can make yourself and the computer have zero potential of ESD

by touching bare metal on the inside of the chassis,

or touching the power supply case constantly while working inside the computer.

Most computer components will come inside of a static protective bag.

It's a good idea to leave the components in the bag

Until the moment you're ready to replace them in the system.

You'll generally want to be standing when working inside of a computer.

Sitting on the floor, or sitting in a chair can cause static to build up-

Increasing the chances of an electrostatic discharge.

You'll want to be standing firmly on a hard surface,

and the machine that you're operating on should be sitting on the table.

You'll want to make sure to disconnect all cables and cords from the back of your system:

Power, keyboard, mouse, monitor, peripherals...

Clothing is insulated, so it can maintain a static field separate from your body.

You'll want to avoid wearing clothes that are prone to gather static.

You probably already have a good idea of what type of clothes these are,

but it's a bad idea to wear wool or some synthetics.

to minimize the risk of your clothing touching computer components.

Did you know that lumberjacks can work on computers too?

In order to prevent ESD and reduce other complications,

you'll want to remove any jewelry or accessories before operating on a computer.

This concludes our video on electrostatic discharge.

Hopefully you've come away with a good idea of what ESD is,

what types of damage it does to electronics,

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ESD 保護 (Understanding Electrostatic Discharge (ESD) for Technicians) ()

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