Earth bonding plugs + anti-static mats...

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Archived from groups: alt.comp.hardware.homebuilt (More info?)

Never built own PC before, wanted to buy an Earth Bonding Plug and
Bench Mat for computer build and I suppose I would've just bought any
except I've been given more information than I understand, I suppose
it doesnt really matter (?) but one plug is 1 meg ohms and the other
er, isn't - which should I get?
Several mats, the one I was gonna get has: surface resitivity >10 to
power of 7 - <10 to power of 9 ohm/sq
en100 015/1 iec61340-5-1

adequate?

TIA

 

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Archived from groups: alt.comp.hardware.homebuilt (More info?)

On Tue, 18 May 2004 20:39:14 +0100, Davo wrote:

>
> Never built own PC before, wanted to buy an Earth Bonding Plug and
> Bench Mat for computer build and I suppose I would've just bought any
> except I've been given more information than I understand, I suppose
> it doesnt really matter (?) but one plug is 1 meg ohms and the other
> er, isn't - which should I get?
> Several mats, the one I was gonna get has: surface resitivity >10 to
> power of 7 - <10 to power of 9 ohm/sq
> en100 015/1 iec61340-5-1
>
> adequate?
>
Nothing is adequate as long as you aren't in a static prone (dry)
atmosphere. I've built several hundred PC's with some older than 10 years
still running. Just use a little common sense and you shouldn't have a
problem. MB's usually come in a staic bag. I place the MB on top of the
box and plug in what I need to test it. Sometimes I put the foam under the
box, sometimes I don't. All the wrist straps i get go in file 13.

--
Abit KT7-Raid (KT133) Tbred B core CPU @2400MHz (24x100FSB)
http://mysite.verizon.net/res0exft/cpu.htm

 

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Archived from groups: alt.comp.hardware.homebuilt (More info?)

In article <pan.2004.05.18.22.08.23.655542@TAKEOUTverizon.net>,
Wes Newell <w.newell@TAKEOUTverizon.net> wrote:
>On Tue, 18 May 2004 20:39:14 +0100, Davo wrote:
>
>>
>> Never built own PC before, wanted to buy an Earth Bonding Plug and
>> Bench Mat for computer build and I suppose I would've just bought any
>> except I've been given more information than I understand, I suppose
>> it doesnt really matter (?) but one plug is 1 meg ohms and the other
>> er, isn't - which should I get?
>> Several mats, the one I was gonna get has: surface resitivity >10 to
>> power of 7 - <10 to power of 9 ohm/sq
>> en100 015/1 iec61340-5-1
>>
>> adequate?
>>
>Nothing is adequate as long as you aren't in a static prone (dry)

^^^^^ I think you meant "anything" . I agree.

>atmosphere. I've built several hundred PC's with some older than 10 years
>still running. Just use a little common sense and you shouldn't have a
>problem. MB's usually come in a staic bag. I place the MB on top of the
>box and plug in what I need to test it. Sometimes I put the foam under the
>box, sometimes I don't. All the wrist straps i get go in file 13.


I make a habit of always touching the chassis before I reach for a
component.

You should never work on a system while the power cord is plugged in,
even if the system is off. There is always voltage on the motherboard,
otherwise.

Don't plug a PCI card in/out while a system is power up :-( I can
testify that a PCI card and mobo _can_ survive this, but I don't
recommend it.

I have an antistatic strap, and I'm apt to use it if in the case
something went wrong, someone would be really pissed. This can happen
when working on a client's system where unplanned downtime to order a
replacement part. Sometimes it's defensive, so that if the system
has problems after I've worked on it I can rule out static.

If I'm handling an expensive CPU or memory chip I'll use the strap.
Once it's in the motherboard and tested it's really hard to damage.



--
Al Dykes
-----------
adykes at p a n i x . c o m

 

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Archived from groups: alt.comp.hardware.homebuilt (More info?)

Davo wrote:
> Never built own PC before, wanted to buy an Earth Bonding Plug and
> Bench Mat for computer build and I suppose I would've just bought any
> except I've been given more information than I understand, I suppose
> it doesnt really matter (?) but one plug is 1 meg ohms and the other
> er, isn't - which should I get?
> Several mats, the one I was gonna get has: surface resitivity >10 to
> power of 7 - <10 to power of 9 ohm/sq
> en100 015/1 iec61340-5-1
>
> adequate?
>
> TIA
Watched a co-engineer check in 10,000 diodes for a build on the
production line. He kept getting open readings! We are in Florida,
home of high humidity! We "NEVER" had any static electricity problem,
before, so, it MUST be all bad DIODES!!! Floor is concrete, the desktop
is wood/formica, on steel legs, stool is wood, on steel legs... no carpet!

WRONG!, he didn't put on his anti-static wrist strap, and it was 60
outside, and the buildings 21 Central Air units, on the roof, had just
been switched over to heat the place! Low humidity, some polyester
socks, and/or wool blend clothes, equaled over 60,000 Volts of static,
more than enough to blow a semiconductor junction!

So, I unplug the CPU, and, wear the grounded 1 MegOhm strap!!!


The 1 meg ohm resistance bleeds off the static charge, with no sparks!
A dead short to ground wrist strap would be a potential hazard if you
touch any voltage lines, plus, your wrist might tingle with the static
electricity discharge!
My $0.02, a penny for your thoughts?

 

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Archived from groups: alt.comp.hardware.homebuilt (More info?)

On Wed, 19 May 2004 01:24:53 +0000, Patrick wrote:

> Watched a co-engineer check in 10,000 diodes for a build on the
> production line. He kept getting open readings! We are in Florida,
> home of high humidity! We "NEVER" had any static electricity problem,
> before, so, it MUST be all bad DIODES!!! Floor is concrete, the desktop
> is wood/formica, on steel legs, stool is wood, on steel legs... no carpet!
>
> WRONG!, he didn't put on his anti-static wrist strap, and it was 60
> outside, and the buildings 21 Central Air units, on the roof, had just
> been switched over to heat the place! Low humidity, some polyester
> socks, and/or wool blend clothes, equaled over 60,000 Volts of static,
> more than enough to blow a semiconductor junction!
>
I've never heard anything so rediculous. Great story though. After reading
this I came to the conclusion he probably had the anode and cathode leads
reversed for the test which would give an open on all 10,000 diodes.


--
Abit KT7-Raid (KT133) Tbred B core CPU @2400MHz (24x100FSB)
http://mysite.verizon.net/res0exft/cpu.htm