The comments reminded me of a story I heard about some years ago.
A pcb design included a metal canned crystal oscillator, the unit being
mounted in a metal enclosure. During ESD testing, the system functioned
correctly until before the end of the requisite zaps, the oscillator
failed. After
Alex,
Amendment 2:2001 to EN 61000-4-2:1995 (same as Amendment A2:2000 to IEC
61000-4-2:1995) calls for discharging ungrounded equipment, or
ungrounded part(s) of equipment between ESD zaps. You use a bleeder
cable with 470k resistors at both ends, connected to the horizontal
coupling plane for
To:
'emc-p...@majordomo.ieee.org' emc-p...@majordomo.ieee.org
tronic.com cc:
Sent by:Subject: ESD Testing
Method
Pommerenke
-Original Message-
From: Alex McNeil [mailto:alex.mcn...@ingenicofortronic.com]
Sent: Tuesday, December 03, 2002 10:16 AM
To: 'emc-p...@majordomo.ieee.org'
Subject: ESD Testing Method
Hi Guys,
1. For double insulated products (non-earthed) is it correct to state
that
the ESD
Alex,
The new A2 (Feb 2001) of EN61000-4-2:1995 is very clear on this point.
Paragraph 7.1.3 states the charge on the EUT shall be removed prior to
each applied ESD pulse. I think this would take care of the problem you are
seeing with the charge reversal that you talk about in question 2.
Dan
To: 'emc-p...@majordomo.ieee.org'
Subject: ESD Testing Method
Hi Guys,
1. For double insulated products (non-earthed) is it correct to state that
the ESD test point, for Contact Discharge (CD) tests, should be discharged
prior to applying the next discharge (I am sure I read this somewhere
Hi Guys,
1. For double insulated products (non-earthed) is it correct to state that
the ESD test point, for Contact Discharge (CD) tests, should be discharged
prior to applying the next discharge (I am sure I read this somewhere,
but)?
2. As a follow on from the first question, I have a
7 matches
Mail list logo
