Hi Rich,
I agree with the circumstances that you've described below. But in this
case there was no mod. The hardware was returned briefly to the
manufacturer for some verification and now the lab is telling us that
they have to re-test simply because the hardware left their lab. I
understand that there are circumstances in the course of EMC testing
where a modification might cause a problem "elsewhere" (I call it
squeezing the balloon). It's not uncommon. But in this case there are
no changes to hardware and we're being told that this re-testing is
being imposed simply because it briefly left their building.
The fellow that's managing the project for this NRTL tells me that this
is his first S.A. project and he's on a learning curve. Lucky me.
Best regards,
Carl
On 5/17/2021 5:43 PM, Richard Nute wrote:
Hi Carl:
I cannot confirm that the SABS accreditation requires re-testing.
However, this not unusual. I have experienced this same situation in
safety testing. If a failure, the complete complement of tests is
repeated on the “fixed” unit or another unit. The test house doesn’t
know whether the fix affected the other test results.
Sometimes, only the fix is tested again – if the test house makes a
determination that the fix is unlikely to affect the other test
results. They will consider your rationale that the fix does not
affect the other test results, but not necessarily accept your rationale.
Stay safe, and best regards,
Rich
*From:*Carl Newton <[email protected]>
*Sent:* Monday, May 17, 2021 11:52 AM
*To:* [email protected]
*Subject:* [PSES] South African SABS EMC Testing
Group,
I'm writing to ask if anyone in the group is familiar enough with
South African SABS EMC testing through accredited labs to answer my
question regarding sequence of testing. I'm trying to get an ITE
setup through a major USA NRTL EMC lab in order to get the SABS EMC
Certificate of Compliance. We had a radiated emissions issue after
the conducted emissions testing was completed upon AC mains and
Ethernet port. The hardware setup was returned to the manufacturer
and subsequently returned to the EMC lab without change. Now the EMC
lab is telling me that their SABS accreditation demands that all
conducted emissions be repeated because the hardware setup left the
lab's possession (and adjusted their quote accordingly).
Can anyone on the list here confirm that SABS lab accreditation
mandates this type of action?
Thanks,
Carl
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