Dear all ,
(I think I am opening a can of worms ... )
The earlier thread get me thinking about those items that are excluded
(from FCC testing and now DOC) even if it "...generated and uses timing
pulses at a rate in excess of 9000 pulses per second and uses digital
techniques....".
Can some of you reconfirm what was long held and believe to be true.
The list includes:
Wrist Watches, (... if it is small enough to be worn on a wrist....)
Pocket Calculators, (or be put into a pocket...)
Coffee Makers... (or that it trully makes coffee)
AFAIK, these things was "exempted from testing to FCC standards" because
they have not known to cause any EMC problem in the past.
Please add to this list. I have for years never to seek out the reference
and it is now time to hear from you quote the chapter and 'verse' where the
FCC state that these are exempted....
sincerely, :-)
Tim Foo
"Sykes, William Thomas (Tom)" <[email protected]> wrote on 08/05/2004 07:27
AM
All:
Please refer to the "Guidelines on the application of Directive 89/336/EEC"
at
http://europa.eu.int/comm/enterprise/electr_equipment/emc/guides/chapfive.htm
.
In Section 5.4 "Additional practical criteria (accepted by consensus) to
exclude equipment from the scope of the EMC Directive."
5.4.1 "Practical criteria and illustrative examples" it states "Although it
should in principle be considered as within the scope of the Directive, the
following apparatus can be considered as exempted, based upon both of the
following criteria, which have also been taken in account into the
development of EMC standards: ...Other equipment fulfilling the criteria
above:... Quartz wrist watches without additional functions (e.g. radio
receivers)."
So it appears that quartz watches are exempt by their own words, but if you
have additional functions that involve a clock (oscillator), I would at
least do a prescreen to see what kind of emissions were present.
William T. Sykes
Lucent Technologies EH&S
Product Safety/Conformance Manager
Room 7B-516A
600-700 Mountain Avenue
Murray Hill, NJ 07974-0636
(908)582-6937
[email protected] wrote on 08/05/2004 03:21 AM
Subject: Clocks and calculators
Dear Group,
I want to ask you, if battery calculators and battery quartz clocks and
watches (advertise gadgets) should be tested according to EMC directive?
And
if not, why?
Best regards
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