True.
Same experience.
To "legitimize" the test we had to "discharge" the case/structure between
discharges.
Or, to really aggravate the test, we went from - to + to - to + which often
caused a failure.
But the point to test at all voltage levels is well made. The discharge
wavefront (and attending spectrum) varies so much as a function of voltage
level, it is best to not skip any levels if you're trying to rigorously
evaluate the EUT.
- Robert -
-----Original Message-----
From: [email protected] <[email protected]>
To: Jacowleff, Bill <[email protected]>
Cc: '[email protected]' <[email protected]>;
[email protected] <[email protected]>
List-Post: [email protected]
Date: Tuesday, January 18, 2000 12:55 AM
Subject: RE: EN 61000-4-2
>
>Bill,
>
>We have found that stepping up through the test voltages can give
misleading
>results. Our products are plastic cased, and they appear to 'charge' as
the
>test voltages are applied. The result is a pass if 10kv (for example) is
>applied by stepping in 2kv steps, but a fail if 10kv is applied directly.
>
>Perhaps both methods should be used?
>
>Cheers,
>
>Carlos.
>
>
---------
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