Warning - not an EMI guru, but I did have peanut butter with my bagel, and I
have just recently automated C/I tests.
Process automation, when done for a good reason is almost always good.
Sometimes very good. ISO17025 will be the determining factor for system
complexity - so if only for pre-comp, do whatever hack is within your
available resources that yields consistent and repeatable results (and
ignore all of the 17025 stuff). Part of 'automation' is the fixture, so the
CDN, clamp, BCI, etc should be fixed. And the calibration fixture should be
built in to the overall test fixture. This is probably more easy for me to
do because we are testing mostly small (5kVA) power converters. The only
thing I did for cal was to have the computer log a table of signal levels
and freqs, where the same table is used to drive the test.
The main reason for a non-test house company to automate is to enforce
process discipline and remove humans from the loop. Drawback is that the
design engrs complain about setups that cannot be modified. They will get
over it. The other negative is that if rolling your own means that you are
tech support when stuff does not work, but system cost will probably be 30%
of a commercial integration. I am vendor-neutral for this specific test -
use whatever keeps the empire from collapsing.
Brian
-Original Message-
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org]On Behalf Of Sykes, Bob
Sent: Friday, January 11, 2013 11:59 AM
To: emc-p...@ieee.org
Subject: Automated testing to EN61000-4-6
I am investigating purchasing test equipment to perform 61000-4-6 R.F.
conducted immunity testing. There's lots of choices out there, and I see a
couple of integrated, automated systems that look interesting (albeit at a
price premium I'm sure). My questions are: Does anyone on this list use an
automated test setup? And what are the drawbacks (if any) of such an
approach. The marketing literature doesn't seem to go there. It's all
good. I suppose any vendor specific negative stories should be sent direct
and not to the listserv.
adTHANKSvance,
Bob Sykes
Unrelated Friday humor for those involved in ESD testing
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