Amund,
My experience has been that the labs would prefer to perform the ESD
tests at a rate of 1 pulse/second (pps) for the sake of efficiency. If the
product passes then it was completed in the least amount of time and
everyone's happy. If the product fails at 1 pps, then you are allowed to
decrease the pulse rate until the product passes. If it still fails at
lower rates (say 0.1 pps - one ESD event every 10 seconds), then you
probably have problems. I've had products fail at 1 pps and pass at 0.5
pps. It took longer to run the test, but it passed and met the requirements
of the standard(s). My interpretation of the requirements is that there is
no maximum limit between ESD discharges.
Thx,
Joe
-----Original Message-----
From: am...@westin.org [mailto:am...@westin.org]
Sent: Wednesday, August 01, 2001 4:07 PM
To: emc-p...@majordomo.ieee.org
Subject: ESD - time between successive discharges
Dear members,
>From IEC61000-4-2 and several EN-product standards, they specify the time
between successive discharges to be at least 1 second.
But what is the maximum time between each pulse ? I can not see that it is
stated in any standards. I guess the test labs use 1 pulse pr second.
I feel that the pulse rate can have influences on the EUT performance, so 1
second compared to 3-5 seconds might be the difference between PASS and
FAIL.
Any suggestions ?
Best regards
Amund Westin
Oslo, Norway
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