ESD Safety

[Bruce Beford]

Ron wrote:
> Typical Electrostatic Voltage Levels

> Relative Humidity for each voltage level shown below:
> 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
> <snip>

Being aware of these facts, and not letting it paralyze you with fear:
Priceless.

73,
Bruce N1RX

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft   

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

[Matt Palmer-4]

Knowing that you need 2000V or so before you feel it illustraits why
its important to take ESD precautions with sensitive parts, very
recently at work we had an LDMOS device that would be destroyed with
about 30V which means moving your hand in the air near it would cook
it, hence why the use of wriststraps, smocks and ionizers is key, most
electronics are not this sensitive however. (class 3 is 16KV)
Matt
KD8DAO
_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft   

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com