Clause 4.1.3 of EN 55014-1:2006 covers radiated emissions for toys from 30
MHz to 1000 MHz. This test is restricted to toys otherwise disturbance
power is measured on an extended power cord (5.6 m) with an absorbing clamp
in the range of 30 MHz to 300 MHz.
The test is run now using actual auxiliary loads.
Bob Heller
3M EMC Laboratory, 76-1-01
St. Paul, MN 55107-1208
Tel: 651- 778-6336
Fax: 651-778-6252
=========================
Bob Richards
<[email protected]
m> To
Sent by: [email protected]
[email protected] cc
Subject
02/11/2007 08:33 Re: EN55014 & EN55022/24 test &
PM limit similarities?
Bob,
You are right, that is why I said:
"I believe that if your module passes 55022 class B limits, and also the
next higher level in 55024, your module will probably not contribute to a
failure in the end product."
;-)
I never tested any "toys" so I am not familiar with that. Is that part of
55014 now (or then)? I do remember there was a section in 55014 covering
internal vibrators, and what was to be used as the auxillary "load" for
test purposes. :-O And, no, I never had the chance to test any of those.
At the time I was performing tests to 55014, there was a separate standard
for immunity, I believe it was 55104.
Cheers,
Bob Richards, NCT
[email protected] wrote:
There is a "radiated" emissions test for toys and I would advise doing the
test for all products. The radiated test for 55014-1 is a disturbance
power
test mush as you described but I would not come to the conclusion that
passing EN 55022 Class B would be all right.
Also EN 55014-1 covers emissions and EN 55014-2 covers immunity.
Bob Heller
3M EMC Laboratory, 76-1-01
St. Paul, MN 55107-1208
Tel: 651- 778-6336
Fax: 651-778-6252
===============================================================
Bob Richards
m> To
Sent by: David Heald
[email protected] ieee
cc
02/09/2007 11:08 Subject
AM Re: EN55014 & EN55022/24 test &
limit similarities?
David,
It has been a few years since I tested anything to 55014, and I don't have
access to 55014 now, so what I say may be dated.
IIRC, Unless the product is a power tool, 55014 has similar conducted
emissions limits. I believe the average limit is actually higher at
150kHz,
but pretty much the same as class B 55022 limits. Power tools have higher
limits.
In 55014, there is no "radiated" emissions test. However there is a
disturbance power test, which covers 30-300 MHz using an absorber clamp to
measure the emissions on any cables exiting the product. This test is what
some labs refer to as the "track test", since the absorber clamp has
wheels, and is moved along some sort of track to maximize the emissions.
There is a "click" test, or discontinuous disturbance test. This is an
additional conducted disturbance test for very short duration spikes in
the
conducted emissions, due to switching transients that may exist in
products
with relays or contactors. It is basically a relaxation of the normal
conducted QP limits for these transients. The amount of relaxation of the
limit is based on the click frequency, the fewer clicks the more the limit
is relaxed.
Conducted immunity covers up to 230 MHz instead of 80 MHz. There is no
radiated immunity.
I believe EFT and surge tests are similar.
I believe that if your module passes 55022 class B limits, and also the
next higher level in 55024, your module will probably not contribute to a
failure in the end product.
I hope this helps.
Bob Richards, NCT.
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