Don't forget about the impact tests. These batteries are not known for taking
much impact without damage. Being that it is warn, I would subject the
pack/belt to all impact tests including those for hand held devices.
How are the battery pack recharged? While it is still in the belt? This
Happy Holidays Group,
Let me set the scene for you:
We have a piece of laboratory equipment that has a 10,000 volt low current power
supply that puts a high potential onto a small metal sample as it is being
tested. When the operator opens a door to remove the sample we have to turn off
the
Thanks to everyone who responded to my earlier email. After reading the
replies, I wanted to rephrase and clarify our situation to see if it matters.
We design, manufacture, and market stand-a-lone Product A. But some of our
customers want a complete turn-key system. So we purchase and
Has this ever happened to you?
We manufacture analysis instrumentation equipment. The part we make is usually
part of a complex system made up of other CE marked equipment from many
different suppliers. Sometimes when we have a system tested for CE (emissions
and immunity), one of the other
I was just looking through my new copy of IEC61000-3-3:1994+A1:2001 standard.
Under section 1 SCOPE, in the forth paragraph, it refers to the 3-11 standard
this way;
Part 3-11 is applicable to equipment with rated input current less than or
equal to 75 A per phase and subject to conditional
Greetings all,
One of our Engineering Teams wants to use a NiCad battery pack in an upcoming
product (laboratory instrument). I'm suppose to become an expert on Worldwide
Environmental Impact of NiCad batteries in 24 hours so I can give a report in a
meeting (haven't we all been there before?).
Greeting to all,
Our company makes Laboratory Instrumentation which many employs a small furnace.
In case the furnace control circuit fails, we have a secondary Over Temperature
Protection Circuit (OTPC) which opens a double pole relay to shut power off to
the heater coils.
In a new design we
Dear Group,
Our Engineering Department thinks that USB is the worlds best interface. Though
it has a lot going for it, I'm not sure if is all that, but never the less, I'm
seeing it used to control and interface with commercial and industrial
instrumentation requiring the more severe immunity
Greetings all,
We are designing an instrument for laboratory use that will use liquid nitrogen.
We will need to design our own dewar system too.
Being new to the use of liquid nitrogen we want to make sure we apply all the
necessary safety requirements to our product. We have searched the
Hello Group,
We have been asked by a customer in Ireland to provide them with a letter
stating our drive to Electronic Rule Compliance; stating the current version of
the software available and when we expect to be fully compliant.
We are a laboratory equipment company and have never seen this
Gary,
If cost is not a big factor, try contacting Sunol in California. The contact I
have is Dale Guthery at (925) 485-9260 (but I haven't talked to them in several
years). I know a few years ago the were selling EMC test tables based on a
design of ours which had wheels that could be easily
Michael,
I maters if you are trying to place suppressors across the line or from line to
chassis. Here is a copy of something you might find useful.
Brian Kunde
LECO Corp.
Transient Suppressors
according to EN60950 CCA doc section 1.5
ACROSS THE MAINS Transient suppressors can be connected
Dan,
This information was in a TUV Newsletter last year.
Brian
Transient Suppressors
according to EN60950 CCA doc section 1.5
ACROSS THE MAINS Transient suppressors can be connected across the mains if it
is separately
approved to IEC 1051-1 and IEC 1051-2 (or CECC 42200). If it is not
Tom,
I know what you mean. Though the tolerance is quite large, it is most difficult
to get real numbers from the graph in the ANSI standard. What I did was lookup
the Impedance Data for my LISNs that I got from the manufacturer. These are Real
Numbers that I use as a baseline to compare my
We also have come up with a simple way to test our ESD gun, but it requires the
help from our lab assistant (lab managers work good too).
First, have them take off their shoes and socks and stand on the Ground
Reference Plan. Have them wet their fingers and grab the end of the ESD gun.
Crank
Greetings,
We have an analyzer that is controlled by a standard PC through the USB
interface. When performing Fast Transient Burst test on the analyzer (according
to EN61000-4-4 Level 3) at 2KV the USB communications goes down and does not
recover without re-powering up the unit. We found that
Keep in mind that the location of the pre-amp can make a big difference too. If
you are trying to make up for cable loss, the best place to put the pre-amp is
near the antenna, before the loss occurs. Some labs mount one of those small
amp-modules right on the antenna but you have to run DC
If you want to save some money, try Mini-Circuits. http://www.minicircuits.com/
We use one of their amps as a pre-amp to our receiver (don't have the model
number handy). It give us about 22db gain from 10Mhz-2Ghz. Works good and it
cost hundreds, not thousands of dollars. Beware! What you
Greetings,
We are looking for a good quality 10 foot USB cable. We have an application
where the USB cable must have a low impedance in the shield and shield
termination to pass the emissions and immunity tests for Europe.
Not knowing much about USB I did some research on the Web and USB
We have an application where an In-Line Fuse would be an easy fit to a problem.
The fuse and holder would be added to an existing internal cable harness in a
piece of Lab Equipment (EN61010-1 for safety). The wire that needs the fuse has
120 Volts ACrms and we need to limit the current to 5
Peter,
I have some input on the HiPot Test #3.
A HiPot Failure is a breakdown in insulation usually by an arc or other rapid
conduction. Most HiPot testers these days have detection circuits which can
tell how the unit failed. Mine shows on the display either ARC or Breakdown.
HiPot testers
Brian,
Check out the following web site:
http://w3.hike.te.chiba-u.ac.jp/iec417/ver2.0/html/index.html
It has the IEC417 on-line.
I think the AC symbol you are referring to is No. 417-IEC-5032
Brian
Reply Separator
Subject:markings
Author: Brian
All this talk about Test Labs has got me thinking about the cost for EMC Testing
for CE marking. I know test labs have become more competitive over the last few
years but am I paying too much?
I know that the cost depends on many factors such as the size of the EUT and how
many
Hello Praveen,
The topic in which your question addresses is Grounding. Grounding is one of
the most complex topics EMC engineers have to deal with especially in a design
that has both Analog and Digital circuitry. Most every case is different and
there are thousands of variables to consider.
Wow! Great Responses. So much history I was not aware of. Great analogies too.
Thanks to everyone who responded.
Brian
---
This message is from the IEEE EMC Society Product Safety
Technical Committee emc-pstc discussion list.
To cancel your
I have heard of several people fighting a ticket with claims of the radar gun
not working or being used right. In all cases they lost (all people I know). I
wish you luck and please let us know how it turned out.
Looking at it from their side, if a Judge ruled that the radar (or laser) guns
The issue of designing in Overcurrent Protection on one side or both sides of
the AC mains keeps coming up. We deal in Laboratory Equipment so the EN 61010-1
is the standard we use. I'm not sure what EN60950 would say on the subject.
The only area I have found that deals with this question is
Members,
IEC 1000-4-11 is for equipment 16 amps per phase or less. We are looking to
purchase an AC power source that will perform this test as well as the IEC
1000-4-13, 4-14, and 4-28. I don't have copies of these standards.
Do these other standard have a current limit of 16 amps like the
TDK sent me several sheets of Ferrite material as samples. The material is very
flexible and can be cut to any shape with scissors. I do not know if TDK
provides this material in pre-cut sizes for IC Chips or have it available with
PSA. I have not had an opportunity to try this material so I
Regulatory Management Humor from a past employer.
Like most companies, the Regulatory department was considered a bottleneck in
the development cycle. Our Director (that's right, we had a Director of
Regulatory Compliance) always fought to get prototypes into our lab as soon as
possible to speed
Wasn't Apollo 11 the one that was struck by lightning during launch?
My hat is off to all you NASA guys.
Brian
--
From: Lou Gnecco l...@tempest-inc.com
Sent: Thursday, March 11, 1999 3:47 PM
To: emc-p...@ieee.org
Subject:worst emc problem contest
Hello members!
In the early 1980's, I worked for a company that manufactured PCs and
peripherals. I worked in a Functional Testing Lab where we ran functional tests
on our new designs before allowing them to go to production.
I was testing a dot matrix printer which our company purchased the electronics
and
A company I'm representing manufacturers Engine Panels and Pilot House Controls
for boats, yachts, and tankers. Most of the components in these assemblies are
gauges and mechanical controls, but some incorporate electronic gauges and
controls. On a recent contract with a European boat
Our company builds laboratory equipment. Some of our products draws less than
16 amp per phase and some draws more (currently up to 45 amps). We wish to
purchase the test equipment to perform the EN61000-3-2 test but have held off
not knowing what requirements might show up in the future
Our company builds laboratory equipment. Some of our products draws less than
16 amp per phase and some draws more (currently up to 45 amps). We wish to
purchase the test equipment to perform the EN61000-3-2 test but have held off
not knowing what requirements might show up in the future
It's that time of year again where our lab must perform the dreaded Calibration
of Field test for the EN61000-4-3 standard Radiated Immunity. If you
performed the test as explained in the standard (section 6) moving the Field
Probe to each of the 16 positions for each frequency for both vertical
Our company manufacturers a test instrument that contains a small
furnace. The furnace assembly consist of a heating element
encapsulated in a silica based cube. The cube provides temperature and
electrical insulation.
Our production units have recently
Does anyone know if a tool exists that can be used to safely discharge
a stored charge in a capacitor (used in power supplies and RF
generators)? Such a tool should have an adjustable resistance value
and some kind of indicator when the potential has been reduced to
I have been asked to investigate the safety of a household Air
Cleaning device which uses an RF ION Generator to produce a low level
Ozone. The manufacturer of this device provided me with a CSA
Certificate that quotes the following standards:
CSA Std C22.2No.
Hi Barry,
Long time no here from.
EMCO sells two models: Model 4610 Royce Field Site Source works from 10Mhz -
600Mhz at a cost of around $2055 US. They make a better one Model 4630 RefRad
Reference Radiator that works from 10Khz to 1 Ghz at a cost around $3895 US. The
better model has a .1%
HP Vectra computer has very good margin. That is what I use. I have more
trouble with monitors than computers. I found the NEC Multisync XV17+ monitor is
very good. HP Inkjet printers have been a good quiet peripheral in the past but
a Deskjet 680C I recently tested had high peak levels when
My company manufactures products that do no legally have to have FCC.
Because of the EMC directive in Europe we are testing our products and
self declaring compliance to EN55011 class B.
Our products also comply to the FCC class B requirements but we do not
wish
Phil,
KG parts are supplied in the US by:
IM Intermark (USA), Inc
One Penn Plaza-Suite 4526
New York, NY 10119-0001
(212) 629-3620
(212) 967-3948 fax
The person I deal with is Cristian Radu (Sales Engineer).
Hope this helps,
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