In a message dated 9/17/2002, Rob Keller writes:
So, because of the ring signals, which would exceed the
limits of SELV, connecting to the input the modem, should the
classification be TNV-3.
Hi Rob:
If the tip/ring pair that the DSL modem interfaces to has power ringing on it
(such as
We thought about buying used chamber rather than moving ours. However, we
found the cost of a used chamber including the installation cost was such
that we would have rather bought a new one.
Richard Woods
Sensormatic Electronics
Tyco International
-Original Message-
From: Pettit,
Greetings all,
Question regarding the classification of DSL modems. DSL modems connect
to the standard telecom network yet they do not require a ring signal or
go on/off hook, therefore the classification would be TNV-1. Yet there
are ring signals still present on the telecom lines for the the
Hans,
Heck, that HP chamber is only 20 years old! Just getting broken in! grin
Ghery Pettit
-Original Message-
From: Hans Mellberg [mailto:emcconsult...@yahoo.com]
Sent: Tuesday, September 17, 2002 1:04 PM
To: Judy Johnson; richwo...@tycoint.com; emc-p...@majordomo.ieee.org
Subject:
You don't say where you are since it may impact the delivered cost but, rumour
has
it that the HP Cupertino Chamber may be dismantled as NSD has been absorbed,
obviated or retired (pick your own euphemism!) by the Compaq group in
Austin/Cupertino and besides, the Compaq Cupertino site is newer
ETSI 300 019-1-3 AND Telcordia NEBS GR-63-CORE are standards that I've had
to deal with.
ETSI's requirements are considerably more stringent, and are quoted in bels
which is a sound power (normalized to 1m^2) independent of distance. GR-63
measures sound pressure at a specified distance (0.6m
When relocating any chamber:
mark all panels accordingly and make sure
you assemble them in the place as they were mounted originally !
- If the original chmaber was placed on a flattened surface,
make sure that the new location is equally flat.
This is true for the opposite too, but difficult
Hi John,
Officially this type of apparatus does not qualify
for ce marking due to the reasons you gave.
Commercial reasons make that most product of this type
in Europe ARE ce marked. To my knowledge
none was prosecuted for illegal use of the ce mark.
What the ce mark implies is thet you
I read in !emc-pstc that Tyra, John john_t...@bose.com wrote (in
418fbd441c22d5118d860003470d43160543e...@cupid.bose.com) about 'CE
Marking for Passive speakers' on Tue, 17 Sep 2002:
I was wondering if anyone out there can provide me with help in determining
whether passive speakers and
All,
Do not look at the spark without eye protection.
Rocky
-)-(-
Kenneth P. Gonzalez (Rocky)
Intergraph Solutions Group
Integrated Products Division
170 Graphics Drive
Madison, Alabama, USA 35758
phone (256) 730-2131
fax (256)730-2424
kpgon...@ingr.com
-Original
If you want an NB to accept your test data, at least one agency engineer has
recommended this model:
http://www.therm-x.com/Product.asp?Param1=258BParam2=5
If you do not have 1300+ USD in your budget, a simple cap-discharge welder
is easy to build, but requires that you do the uncertainty
Yes. Get a good beefy DC power supply.
Attach both leads of the thermocouple to one of the
outputs PLUS or MINUS. Doesn't matter.
Twist together the leads to be welded.
Get a piece of lead that's used in drafters pencils.
Attach this piece of lead to the other output of
the power
MCA Compliance Solutions Ltd wishes to recruit a Senior Technician and/or a
Junior Technician to work in its Product Safety Lab.
Senior Technician
-
1. Must have a proven track record in product safety. This experience can
have been gained in either a product safety test lab
Rich,
Great info that is very timely for me as I am looking purchasing and
relocating a used chamber. Any other tips on what to look for (i.e.
corroded joints) from group members would be very helpful.
Darrell Locke
Advanced Input Devices
-Original Message-
From: richwo...@tycoint.com
Hello everyone,
I was wondering if anyone out there can provide me with help in determining
whether passive speakers and headphones are required to be CE-Marked for
entry into the EU?
We have an old document from BAPT in Germany which implies that passive
speakers are required to be CE Marked
Hello Richard, All,
Does anybody know know of any labs or companies looking to get rid of some
ferrite tiles/panels?
Judy Johnson
- Original Message -
From: richwo...@tycoint.com
To: emc-p...@majordomo.ieee.org
Sent: Tuesday, September 17, 2002 8:24 AM
Subject: RE: EMC Chamber
[ John Woodgate wrote ]
Oh, come on! There are dozens of safety standards;
surely you don't expect me to search and list them all?
[ Doug McKean wrote ]
You can't possibly be serious. I was more interested in the
fact that since this forum is basically ITE, Medical, Test, and
SEMI that
Grettings All,
Does anybody out there know of any labs or companies that may be downsizing or
going out of business looking to get rid of any ferrite tiles?
You may contact me privately if wish.
Judy Johnson
judit...@shentel.net
Grettings All,
Does anybody out there know of any labs or companies that may be downsizing or
going out of business looking to get rid of any ferrite tiles?
You may contact me privately if wish.
Judy Johnson
judit...@shentel.net
any recommendations for a fine-wire thermocouple tip welder ?
Brian
Brian McAuliffe
MCA Compliance Solutions Ltd
Unit 2 Lissane Business Park|Clarecastle|Co.Clare|Ireland
w: www.mcac.ie
e: i...@mcac.ie
t: +353 (0)65 6823452
m: +353 (0)87 2352554
The primary screw has the ground symbol (upside down Christmas tree) in
a circle, all other locations you want to indicate as ground, called PROTECTIVE
BONDING SCREWS by the standard can use the symbol but without the circle, but
it is not required to mark them. At least that's the
Warren,
John stated that Products A and B are sold independent of each other. Only
product A has Listing Marks and is the one that gets inspected by the
Follow-Up inspector. Follow-up inspector never sees Product B unless he's
very smart and gathers from the Product A's manual that it is an
Some low profile AC-DC manufacturers:
Martek
Vicor
Lambda
Pico
None of them are cheap; but if you want low profile, PCB mount, high
reliability; then these are some viable suppliers.
Chris Maxwell | Design Engineer - Optical Division
email chris.maxw...@nettest.com | dir +1 315 266 5128 | fax
Found in my dusty folder of seldom-used standards: ETS 300 753: October 1997
(Equipment Engineering; Acoustic noise emitted by telecommunication
equipment)
Is references:
1. ISO 7779
2. ISO 9296
3. ETS 300 019-1 (1994)
4. EEC directive 86/188/EEC
5. ETR 116 (1994)
6. ECMA TR/27
Call me if you
Jeff, we moved our chamber several times and had someone different do it
each time based upon lowest quote. Some of your panels could be accidentally
damaged during the move. We had some panels starting to separate due to
moisture. Most were salvageable, however. Also, we found some corroded
Dear All,
For a medical device to be worn on the wrist of a patient, does anyone know
what additional requirements (if any) should the manufacturer of the medical
device take in order for the device not to interfere with a cardiac
pacemaker?
My little research on the subject tells me that the
David,
Your question isn't so stupid as you say.
It is correct that the primary grounding screw (the first screw connected to
the ground wire from the AC inlet) shouldn't be used for any purpose other than
grounding.
However, the standards do allow that screws and fasteners can be used to
Gert and Hans,
In Hans's e-mail he specifies dc-dc convertors. In your e-mail, you specify
ac-dc convertor. I assume you mean mains ac - dc.
For dc-dc there you need not purchase a medical grade convertor since I
assume you will have reinforced insulation between the patient aplied part
and
John,
Since product B is an accessory for use with UL Listed Product A, then I
would submit product B to UL for accessory Listing for use with Product A.
This is a very wise thing to do, especially if there were any questions by
local inspectors or by the judge in case of a product liabilility
Bill's AutoSignature reads ..
Friends are those people who know the words to the song in your heart and
sing them back to you when you have forgotten the words.
(unattributed)
*** Visit us at www.artesyn.com/cp
We actually tested the equipment with the wiring installation and it took
several months and quite considerable amount of work to get the equipment to
meet DO-160C with the cabling (supplied by Boeing).
No the system is not flight critical however other systems that have been
supplied by our
I read in !emc-pstc that Doug McKean dmck...@corp.auspex.com wrote (in
006101c25dec$2b8d49e0$cb3e3...@corp.auspex.com) about 'Earthing
through screws.' on Mon, 16 Sep 2002:
[ Doug McKean wrote ]
I wasn't aware that primary grounding securements
could be used for another purpose.
[ John
[ Doug McKean wrote ]
I wasn't aware that primary grounding securements
could be used for another purpose.
[ John Woodgate wrote ]
It depends on the applicable safety standard; some allow it, some don't.
[ Doug McKean wrote ]
Then since you've got my curiosity up, which ones
allow for
The navigation systems which are protected by regulation were developments
of the 1940's, and -- except for interference! -- work pretty well. They
are analog technology, using phase and amplitudes of audio frequency tones
to determine position and/or deviation from course.
For landing, the ILS
Hello Doug,
I believe you are right. If I had taken the trouble to read EN60950 para
2.6.5.7, I would have saved my self from asking stupid questions.
Thanks also to all those who responded to my orignial posting.
regards,
David Sproul.
-Original Message-
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