15 yrs ago, I tested some gaming equipment. There were some unique test specs,
including those to emulate catle prods. One of the specs was around 35kV with
some strange C and R value equivalents. They (gaming mfgs) are very aware of
the neccessity for hard equipment.
Hans
Lisa:
Come to think of it, I have never seen a slot machine that wasn't encased in
metal. Wonder if they use EMI gaskets?.
Mike Conn
Owner/Principal Consultant
Mikon Consulting
Group,
What is your opinion / experience with Laboratory Test equipment
entering the Japanese market?
We certify our equipment to CE EN55011 EN50082-1 for EMC and UL3101
IEC 61010 for product safety.
Does this type of equipment require
Thanks Chris!
I love the gas flame one! (pity its not EMC)
Expect to see these in print one day.
Keith
Chris Dupres wrote:
Hi Keith.
As we wander round this world of Electro-fizz, pop and 2dB-over-limit, we
come across all sorts of strange EMC behaviour, some directly witnessed,
some
Just curious, Anyone have insight on the immunity of Slot machines??
They must have some pretty rigid design criteria else we'd all be
rich. Haven't heard of any odd immunity things happening at Vegas --
Or do people choose not to say?
Lisa
Since you brought it up, I am reminded of a time in my youth before the
Hey Good Buddy... craze hit the CB world. Back when it was a serious
citizens band, licenses were required and I was young and foolish.
I had a 5 channel 1 watt Johnson Messenger One CB. Had great fun 'til I
bought a one kW
Does anyone know if there is a Reliability Engineering group similar
to this EMC/Safety group currently on the internet where engineering
issues, ideas and experiances are discussed.
Thankyou for your time.
Tony Reynolds
Compliance Enginnering
I read an article saying IEC61326 will become an EN standard for EMC for
Laboratory Equipment. What is the mandatory date for this to replace
En50081-1/EN55011 and EN50082-1 that we have been using?
Any other information related the 61326 would be helpful.
Thanks,
Tom Becker
Compliance
You could begin by reviewing CSA's website www.csa.ca
You did not say what kind of equipments you had in mind. The
standards will depend on the nature of the product. If you mean
ITE products, the UL/CSA bi-national standards are almost
identical to IEC 950 or EN 60950.
Please respond to
Hello Paolo,
You can find the CSA's web-link and hundreds more on the Safety Link at:
http://www.safetylink.com
Regards, Art Michael
* * * * * * * * * * * * * * * * * * * * * *
* International Product Safety News *
*Check out our
And, the Reliability Engineering issues are DESCRIBED on any web sites?
Thanks.
-
Original Text
From: Tony Reynolds reyno...@pb.com, on 7/7/98 1:23 PM:
Does anyone know if there is a Reliability Engineering group similar
to this EMC/Safety group currently on the
--- On Tue, 7 Jul 1998 09:24:45 -0400 geor...@lexmark.com wrote:
Chris's list of rumored and witnessed interference problems points
out several key points still true today. There are NO interference
or immunity requirements for most of the world's electrical apparatus.
I once heard the
H, could this be a universal EMC truth?
--- On Tue, 7 Jul 1998 01:52:56 -0400 Chris Dupres
chris_dup...@compuserve.com wrote:
Hi Keith.
As we wander round this world of Electro-fizz, pop and 2dB-over-limit, we
come across all sorts of strange EMC behaviour
- The outside
Obviously it is not the logic circuits I am refering to! The front end of the
power supply has many types of scenarios that can cause high (30 MHz)
frequency emissions. To name a few. Switcher pulse risetime and fall-off. As
semiconductors get better adn smaller, their ft also better (to other
Florence (italy), 7 july '98
Dear Sirs,
do anyone know I can find informations/standards about CSA (canada)
electrical safety requirements for equipments?
Thank in advance.
--
ing paolo fini
italponti telecomunicazioni
via Reims 12 50126
Chris Kendall will be presenting the CORE EMC Design I and CORE EMC Design
II seminars:
Brea, California (Southern California) - July 13-15, 1998
Fremont, California (Northern California) - August 3-5, 1998
For more information, contact me directly or visit the CKC Web site.
Todd Robinson
In a message dated 98-07-07 02:31:48 EDT, treph...@macconnect.com writes:
Testing AC lines will prove whether your card can withstand whatever EFT
can pass through the power supply filtering, but just as important,EFT is
as much a radiated immunity test as it is a conducted test. Often I/O
Yes, Chris.
Quite amusing. Then, of course, there's
the famous fly in the microwave debate ...
ducking quickly
Chris Dupres wrote:
Hi Keith.
As we wander round this world of Electro-fizz, pop and 2dB-over-limit, we
come across all sorts of strange EMC behaviour, some directly
In a message dated 98-07-06 20:40:33 EDT, rbus...@es.com writes:
A test house explained to me that the FCC allows either CISPR or FCC
limits/procedures providing that one can determine worst case.
Consequently, you have to test both ways (120 V 60Hz or 230V 50Hz) to
determine which way you
Typically, the range switch on the cost-sensitive (cheap) power supplies
changes the front-end topology from conventional capacitor input to a
voltage -doubled one. Since the power load stays the same, the current
will double. But the nature of the input current to these supplies is
gulps of
Chris's list of rumored and witnessed intereference problems points
out several key points still true today. There are NO intereference
or immunity requirements for most of the world's electrical apparatus.
Perhaps the most famous case of intereference was when shipboard
electronics fired a
David-
See also the technical report (available from AVX) Surge in Solid
Tantalum Capacitors by John Gill of AVX. He discusses the surge
failure mode of tantalum caps in low Z circuits (e.g. DC power
supplies).
Charlie
Your comment below is absolutely true. Manufacturers spend far too much
time and money obtaining certifications for so many countries that have just
minor differences in their standards. One standard for EMC/product safety
is too simple I guess.
Darrell
--
From:
NARTE can be reached at (508) 533-8333. For anyone interested in this
certification, they will send an informative package detailing the
requirements for certification and a list of study guides. For those of us
who weren't smart enough to grandfather when that opportunity was given, the
exam is
A fools paradise or not I don't know but to say that it is only secondary
circuits that radiates is not true. I have several switch mode power
supplies which have radiated emission up to 150MHz. Especially from 40 -
100MHz I often see problems. This emission is normally very sensitive to
Dear collegues
EMC Workshop held by Rohde Schwarz will take place on 14.-15.07.1998.
in Split, Croatia, EMC lab of Marine Electronics Center. It is connected
with shipboard measurements of RF EM fields originating from shipboard
RF equipment.
Measurements are conducted by EMC project at FER
Hi Keith.
As we wander round this world of Electro-fizz, pop and 2dB-over-limit, we
come across all sorts of strange EMC behaviour, some directly witnessed,
some without an actual source (I heard of a friend of the wife of the chap
who reads the gas meters - etc.)
A few more amusing ones have
Jeff,
Testing AC lines will prove whether your card can withstand whatever EFT
can pass through the power supply filtering, but just as important,EFT is
as much a radiated immunity test as it is a conducted test. Often I/O
cables and others act as pickup antennas, and you should consider the
On Mon, 6 Jul 1998 16:28:20 -0400 , you wrote:
Perhaps the conflict of dates is in the source of the document. The IEC
may say one date and the EU may adopt quite another. As an example: an
EU parallel vote document is usually pretty much in sync with the IEC.
IEC 60950 on the other hand was
good point, Gary. Only the front end of the switcher would see the
different input voltage and frequency. The high-speed oscillators on
the motherboards, etc., should not be affected by input
voltage/frequency, yes?
Dwight
Gary McInturff wrote:
That's interesting. The change from 50 to 60
That's interesting. The change from 50 to 60 Hz would change some input
components and that could effect the input impedance and hence the
conducted emissions signature but the voltage, especially if its a well
regulated and filtered supply should be invisible. The components that
radiate at that
Dwight,
While pursuing a TCF route, this was discussed at length with our CB. The
frequency was of secondary concern to the line voltage. We tested with both
frequencies anyway because we can: it made no discernable difference to our
emission or immunity data..
Best regards,
Derek Walton
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