Jack,

We also make large products and I insist on ESD testing every place an 
operator or maintainer can get to. I test in 2kV increments to 16 kV. There 
are even times when I will go beyond that, like testing the media path (we 
move polyester film around) to see what happens or to solve specific 
problems. Tedious, maybe. But cost effective in the long run.

Scott
s_doug...@ecrm.com

-----Original Message-----
From:   jack.c...@cax.usa.xerox.com [SMTP:jack.c...@cax.usa.xerox.com]
Sent:   Friday, August 13, 1999 4:54 PM
To:     gra...@louisville.stortek.com
Cc:     emc-p...@majordomo.ieee.org; jack.c...@cax.usa.xerox.com
Subject:        RE: Question on internal ESD testing


Charles,

This is a contentious subject for us due to the time it takes to thoroughly
test a large product, so I'd be interested in hearing other's opinions and
practices.

A scenario where ESD can cause a genuine problem (in our business) is when
someone walks across a room to add paper to a printer tray.  In some
machines, the unit will be in standby mode.  In others, it may continue
printing from a different tray or cabinet.  In either case, a discharge to
the internal metal parts of the paper tray could conceivably cause problems
we would consider failures (and have).

Jack Cook
EMC Engineer,
Xerox Corp.
jack.c...@cax.usa.xerox.com
(310)333-5214


-----Original Message-----
From: Grasso, Charles (Chaz) [mailto:gra...@louisville.stortek.com]
Sent: Friday, August 13, 1999 9:35 AM
To: 'EMC Group'
Subject: Question on internal ESD testing



Hello,

Does anyone in this august group apply ESD discharges INTERNAL
to a product as required by EN55024.

I consider this just a tad egregious - don't you?

Thank you
Charles Grasso
Advisory Engineer
StorageTek
2270Sth 88th Street
Louisville CO 80027 M/S 4247.
Tel:303-673-2908
Fax:303-661-7115
email:gra...@louisville.stortek.com
Web Site:  http://www.ewh.ieee.org/r5/denver/rockymountainemc/




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