Considering the installation instructions, it would appear the EUT should be
grounded to the GRP (Ground Reference Plane) underneath the test table, not the
HCP.
Brent DeWitt
Framingham, MA
-----Original Message-----
From: Robert Heller
Sent: Aug 24, 2011 10:11 AM
To: [email protected]
Subject: [PSES] Fw: EN61000-4-2 questions
In my version of 61000-4-2 it states that "The EUT and ESD generator
(including any external power supply) shall be grounded in accordance with
their installation instructions."
Bob Heller
3M EMC Laboratory, 76-1-01
St. Paul, MN 55107-1208
Tel: 651-778-6336
Fax: 651-778-6252
=================================
----- Forwarded by Robert E. Heller/US-Corporate/3M/US on 08/24/2011
09:06 AM -----
From: Derek Walton <[email protected]>
To: [email protected], [email protected]
List-Post: [email protected]
Date: 08/24/2011 07:28 AM
Subject: Re: EN61000-4-2 questions
Sent by: [email protected]
________________________________
Hi Ian,
I would argue that the only purpose of the HCP is for injecting noise
into your EUT. I would consider it an error to hook any grounds to this. I
await correction :-)
Sincerely,
Derek Walton,
L F Research.
-----Original Message-----
From: Ian White (UK) <[email protected]>
To: IEEE Forum ([email protected]) <[email protected]>
Sent: Wed, Aug 24, 2011 4:30 am
Subject: EN61000-4-2 questions
Forum members,
We are testing a product which is made of metal and due to the size of
it l have a table top test set up very similar to that shown in Figure 4 of the
standard EN61000-4-2:2009.
The unit is sitting on insulation 0.5mm thick on the horizontal
coupling reference plane.
In service this product sits in a steam line and has hardwired earths
connected to earth for functional reasons, I have connected these earths to
the horizontal coupling plane, is this correct ? The standard does not appear
to give any guidance on this matter, but it seems the only logical solution.
Thanks for your help.
Ian White
(Compliance and Reliability)
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