Gary -
IEC60825-1 uses units of energy, energy/unit area, power and
power/unit area (regardless of any "special" names
associated with them) rather than candela or lumens, which
are typical for simple LEDs. You'd need some formula to
convert the units to those compatible with IEC60825-1.
However
I read in !emc-pstc that michael.sundst...@nokia.com wrote (in
<57a26d272f67a743952f6b4371b8f811e62...@daebe007.americas.nokia.com>)
about 'David Sproul...UL creepage limits ;~)' on Thu, 10 Oct 2002:
>Or at the least the carb pull back spring is off.
You mean that he needs throttling? (;-)
--
Re
I read in !emc-pstc that POWELL, DOUG wrote (in
) about 'High Voltage
Equipment/Appliance Wire' on Thu, 10 Oct 2002:
>I need to locate a resource for High Voltage Triax cable. It should be
>rated to 2000V AC/DC on both the center conductor and the 1st shield. The
>2nd shield will be grounded a
Hello Group,
I am talking with an offshore manufacturer who is suggesting that their CE
marked ITE gear does not have to pass Surge and EFT since it runs off 12Vdc,
normally provided by an AC/DC power supply, which is supplied in the same
package. They suggest that the AC/DC power supply, but n
Hi Randy,
For C-tick labeled products, Australia's Radiocommunications (Compliance
Labelling - Incidental Emissions) Notice 2001 says records must be kept
"...for 5 years after the device has ceased to be supplied in Australia..."
The records to be kept are more than just a test report, of co
Gary, I have to be concerned about LEDs also and have found that I need to
consult EN 60825-1 in order to determine the design and documentation
requirements for Class II LEDs. Our EU safety agency requires that we
demonstrate compliance even with Class 1 devices. For the lower emission
LEDs, comp
Greetings all,
I need to locate a resource for High Voltage Triax cable. It should be
rated to 2000V AC/DC on both the center conductor and the 1st shield. The
2nd shield will be grounded and then an overall jacket. In addition it
needs to be rated for 160 Amps continuous.
It would be best if
[ Neven wrote ]
> You are seing a spectrum of MLT3 signal, which is 100
> Mbit coding.
[ John wrote ]
> Pardon my naivety, but how does '100 Mbit' relate to frequencies
> of 30 and 60 kHz? Is this 100 Mbit per week? (;-)
Could be plenty. I'd guess is something to do with either jitter and
Or at the least the carb pull back spring is off.
Michael Sundstrom
NOKIA
TCC Dallas / EMC
of: (972) 374-1462
cell: (817) 917-5021
amateur call: KB5UKT
-Original Message-
From: ext Peter L. Tarver [mailto:peter.tar...@sanmina-sci.com]
Sent: Thursday, October 10, 2002 9
Hi All,
We have run into a problem where the ESD discharges to the EUT are getting
onto the 100base T ethernet lines and damaging the support equiment Does
anyone know of a commercially available box that we could put onto or in
series with the Cat 5 cable ethernet line that would provide ESD pro
The actual reason for not connecting the negative terminals directly when
jumpering two cars is the risk of hydrogen explosion in the presence of a
spark. Positive terminals are connected first, then the negative
connections made somewhere away from the battery vents. I happened to be
at a Chec
Randy,
See pertinent sections below for FCC & CE, as well as a url for Australian
info. I hope that this is helpful.
EMC Directive Article 10:
1. In the case of apparatus for which the manufacturer has applied the
standards referred to in Article 7 (1), the conformity of apparatus with
this Di
Can anyone give me the record retention requirements for FCC Part 15,
CE-Mark, and C-Tick certifications? How long must we keep the test reports
once the product has gone obsolete? I believe this to be 2 years from the
last date of manufacture for FCC but can't seem to find the section in the
re
IEC-825 has incorporated LED's into the safety standard but, from what
I can tell, left a great deal of confusion.
I typically deal with the 5 - 10 mcd devices and haven't been required
to provide any IEC-825 conformity proof for the Western European test house. We
may be jumpi
>-Original Message-
>From: John Woodgate [mailto:j...@jmwa.demon.co.uk]
>Sent: Thursday, October 10, 2002 1:10 AM
>To: emc-p...@majordomo.ieee.org
>Subject: Re: EMI suppression for fiber-optic thru-hole ...
>
>
>
>I read in !emc-pstc that Doug McKean
>wrote (in
><011101c26fe3$e97937d0$
Jeeze, Ted. I think your carb chain is loose.
> -Original Message-
> From: owner-emc-p...@majordomo.ieee.org
> [mailto:owner-emc-p...@majordomo.ieee.org]On
> Behalf Of Ted Rook
> Sent: Wednesday, October 09, 2002 7:28 AM
> To: <
> Subject: David Sproul...UL creepage limits ;~)
>
>
>
David,
I assume from your message that relay is UL Recognized but has no European
approval. In this case, you will need the European licenses for the optos.
You wil also need COC with each shipment that the relay manufacturer is
using the same optos.
Best Regards
This e-mail message may conta
Doug -
This was not so uncommon a few years ago. For instance, a
rack mount computer at one time could not be UL Listed and
were only allowed to be UL Recognized Components, based on
the uncertain use environment (elevated internal rack
temperatures). At the same time, obtaining European
certif
Doug,
UL Recognitiion vs TUV GS (Listing) can be because of many factors. Some are
specified below:
1. UL interpertation of some requirements in the standard could have bee
different than TUV's interpretation.
2. The product met all of the EN60950 requirements but lacked some of the US
deviatio
I read in !emc-pstc that Doug McKean wrote (in
<011101c26fe3$e97937d0$cb3e3...@corp.auspex.com>) about 'EMI supression
for fiber-optic thru-hole ...' on Wed, 9 Oct 2002:
>Now the cable is of course non-conductive, but is
>there some emi grommet for the gaping hole in such
>a construction that p
I read in !emc-pstc that neve...@attbi.com wrote (in <20021010021029.WVI
M20316.sccrmhc03.attbi.com@rwcrwbc56>) about 'Ethernet Radiated
Emissions' on Thu, 10 Oct 2002:
>You are seing a spectrum of MLT3 signal, which is 100
>Mbit coding.
Pardon my naivety, but how does '100 Mbit' relate to freq
Laird Technologies (formerly Instrument Specialties) has a part number 97-720
or 97-721 that may fit the "jellyfish" description that John gives below.
> From: John Woodgate [SMTP:j...@jmwa.demon.co.uk]
> Sent: Thursday, October 10, 2002 4:10 AM
> To: emc-p...@majordomo.ieee.org
> Subject:
David,
If the standards are harmonized, then I do not see any reason for UL
requiring higher spacings for 120 V than the European standards for 230 V.
If the standards are not harmonized, yes, there are situations when the
clearances or creepages for US standards for 120 V can be more than the
We had a similar problem about a year ago.
Having tried numerous methods to isolate the source of unwanted
emissions, I was lying on my back looking up at the base panels of the
product (it was mounted on legs). I realised that an external cable that
took the Ethernet signal from one part of t
Hi Jim,
In addition to looking for a competent test house, if you are going to be
dealing with Verizon, make sure that the test house is approved by Verizon
as an ITL. Their *Verizon's* requirements, from both a scrutiny and monetary
standpoint, have unfortunately reduced the number of choices yo
You are seing a spectrum of MLT3 signal, which is 100
Mbit coding. Increased broadband emission is caused
because some of the differential mode (DM) signal is
either converted into common mode (CM) due to imbalance
in the differential signalling or because you have some
power/"ground" "noise"
26 matches
Mail list logo
