I recently replied to another post and mentioned uncertainty in ESD
testing. I thought it would be good to post it separately to start a wider
discussion, so here we go:
In ESD testing, the poor specification of the simulator in standards, like
IEC 61000-4-2 [tel:61000-4-2] , leads to uncertainty (that one cannot
calculate) that far exceeds any uncertainty calculation one could make on
ESD testing. Until we fix the standards, uncertainty calculation for ESD
testing is meaningless. What is needed is a maximum di/dt limit everywhere
on the current waveform and a radiation spec on the simulator. And this is
only for contact discharge. For air discharge, the large uncertainty of the
discharge itself will likely dominate unless hundreds of discharges are
used at each point to reach statistical significance.
Doug Smith Sent from my iPhone IPhone: 408-858-4528 Office: 702-570-6108
Email: d...@dsmith.org Website: http://dsmith.org
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