...@lexmark.com; ieee pstc list
Subject: Re: ESD generators max Contact discharge level
Lower voltages, because of less corona, tend to have more energy, sooner,
relative to the total. You might pass a 15 kV air discharge test -- but
fail, lower.
We ALWAYS want margin, and others ALWAYS want none. My
Lower voltages, because of less corona, tend to have more energy, sooner,
relative to the total. You might pass a 15 kV air discharge test -- but
fail, lower.
We ALWAYS want margin, and others ALWAYS want none. My experience in a
previous area of the industry is, this lasts until a rash of
Ed, the main difference has to do with the tip. An air discharge tip is
rounded, not sharp. While a contact tip is sharp. Each one will allow a
spark to jump the gap to the DUT, but in different ways.
Michael Sundstrom
Product Test Technician EMC
Nokia Mobile Phones, Dallas PCC
* Email
-- Forwarded by John Barnes/Lex/Lexmark on 04/24/2001 11:26
AM ---
John Barnes
04/23/2001 10:56 AM
To: Glyn Garside(TUV) ggarside%us.tuv@interlock.lexmark.com
cc:
Subject: Re: ESD generators max Contact discharge level (Document link
-emc-pstc%ieee@interlock.lexmark.com, Terry Meck
tjmeck%accusort@interlock.lexmark.com (bcc: John Barnes/Lex/Lexmark)
Subject: Re: ESD generators max Contact discharge level
On the other hand very low voltage (and energy) events, such as jingling
change have very high di/dt
'
Subject: RE: ESD generators max Contact discharge level
Chris:
Sorry, my ignorance is showing! I was assuming that an air discharge was
just that; i.e., a test electrode to test electrode discharge in air some
specific distance from the EUT. From your elaboration, I now see that
contact
- Metrology - Reliability Analysis
-Original Message-
From: Gary McInturff [mailto:gary.mcintu...@worldwidepackets.com]
Sent: Monday, April 23, 2001 3:39 PM
To: 'Chris Maxwell'; 'EMC-PSTC Internet Forum'
Subject: RE: ESD generators max Contact discharge level
Hi Chris,
I agree with your
Hi Chris,
I agree with your whole heartedly. If it weren't for people there
wouldn't be an ESD problem. We are wither walking around charging others
stuff like furniture or worse yet we charge ourselves and the go around
touching stuff. For the most part I know of nobody that is able to
[mailto:ed.pr...@cubic.com]
Sent: Monday, April 23, 2001 9:47 AM
To: emc-p...@ieee.org
Subject: RE: ESD generators max Contact discharge level
-Original Message-
From: Chris Maxwell [mailto:chris.maxw...@gnnettest.com]
Sent: Monday, April 23, 2001 4:45 AM
To: 'Dan Kinney (A)'; Douglas C
-Original Message-
From: Chris Maxwell [mailto:chris.maxw...@gnnettest.com]
Sent: Monday, April 23, 2001 4:45 AM
To: 'Dan Kinney (A)'; Douglas C. Smith; Terry Meck
Cc: emc-p...@ieee.org
Subject: RE: ESD generators max Contact discharge level
Hi Dan,
Air discharges are made anywhere
more
properly accessible metal nearby.
Cortland
== Original Message Follows
Date: 23-Apr-01 04:49:02 MsgID: 1078-34050 ToID: 72146,373
From: Chris Maxwell INTERNET:chris.maxw...@gnnettest.com
Subj: RE: ESD generators max Contact discharge level
Chrg
]
Sent: Friday, April 20, 2001 6:07 PM
To: Douglas C. Smith; Terry Meck
Cc: emc-p...@ieee.org
Subject: RE: ESD generators max Contact discharge level
While we're on the topic, I have a question (actually a couple) regarding
air discharge. Since contact discharge is the preferred method
Hi Glyn,
Here is one way to approach 30kV. First, slide out of your car seat, the
Ford Taurus is great for this effect. This puts a charge on your behind.
As you get out of the car (everything is plastic so you remain charged
with respect to the car) your voltage rises because Q=CV. Q stays the
On the other hand very low voltage (and energy) events, such as jingling
change have very high di/dt because of the tens of ps risetimes that
occur at low voltage.
I think this is why, as I recall, some (maybe all?) IEC standards require
you to test not only to the ESD level indicated, but also
To: Terry Meck
Cc: emc-p...@ieee.org
Subject: Re: ESD generators max Contact discharge level
Hi Terry and the group,
Besides the question of finding a generator that can reach the level you
mention, I am not aware of any natural ESD event that approaches the
interference
To: Terry Meck
Cc: emc-p...@ieee.org
Subject: Re: ESD generators max Contact discharge level
Hi Terry and the group,
Besides the question of finding a generator that can reach the level you
mention, I am not aware of any natural ESD event that approaches the
interference potential
Cronin
From: Glyn Garside/TUV<ggars...@us.tuv.com>
Reply-To: Glyn Garside/TUV<ggars...@us.tuv.com>
To: Terry Meck<tjm...@accusort.com>
CC: emc-p...@ieee.org
Subject: Re: ESD generators max Contact discharge level
Date: Fri, 20 Apr 2001 14:11:43 -0500
Does anyone recall [
Hi Terry and the group,
Besides the question of finding a generator that can reach the level you
mention, I am not aware of any natural ESD event that approaches the
interference potential of even an 8 kV contact discharge. The problem
comes in that high voltage air discharges have relatively
Does anyone recall [...] ESD generator that simulated [...] = +-10 kV
CONTACT discharge.
I agree, your client _probably_ meant air, but better to ask.
Nevertheless, as I recall, NoiseKen makes an ESD tester that does 16kV
contact / 30kV air.
http://www.noiseken.com/english/equip/equip.htm
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