From: Ahmad Fallah [mailto:emcesd2...@yahoo.com]
Sent: Wednesday, April 14, 2004 3:39 PM
To: emc-p...@majordomo.ieee.org
Subject: Kalmus Amplifier
Hello all,
Would anyone in the group know of a shop that can repair and calibrate
Kalmus amplifiers? We have sent our broadband amplifier out
After looking at the triboelectric series, it seems that the only time a human
would charge negatively is after falling off an airplane! Otherwise, you are
likely to be positevily charged.
Hans Mellberg
Hello all,
Would anyone in the group know of a shop that can repair and calibrate Kalmus
amplifiers? We have sent our broadband amplifier out for repairs, but the
response has been very slow.
Thanks,
Ahmad Fallah
Did anyone already perform measurements under the directives EN 61000-3-2 and
3-3 using the equipment PHFx from Haefely? Other equipment suggestion?
Many Thanks,
Djonny
--
UFSC - Universidade Federal de Santa Catarina
GEMCO - Grupo de Engenharia em Compatibiliade Eletromagnética
Caixa
You are not going to get a clear answer. You liability is a probability
calculation, no a yes or no answer. You can provide an attendant to
personally warn users as they do the wrong thing and still have liability.
If your product is attractive enough to distract someone's glance as they
walk
Chris -
You might be able to find a barrel connector with a switch
mechanism built in that will remove the batteries from the
circuit automatically, as the plug is inserted. This won't
allow for charging NimH or other secondary cells, but it's
safer for primary cells.
Long ago, I owned a few
Hi Joe:
As a manufacturer, are we covered from any liability as a result of the
user not being aware of what the symbol means? Do we assume that users
know to refer to the manual when they see that symbol? Are there any court
cases that have set precedents on this issue or
We are changing our listserver software from Majordomo
to ListServ. We will announce the date for the change
in future message.
We anticipate no interruption in service; the changeover
should be transparent.
ListServ has a number of user-selectable features that
are not provided by
Ah yes, things get more complicated as usual...
There is something called the Triboelectric series, which gives you some idea
of the charging possibilities between materials There further apart two
materials are in the series, the more charge you get from rubbing them
together -- the
Totally anecdotal reply. I have a Fluke 97 Scopemeter I purchased perhaps
ten years ago. It has a wall-wart supply that recharges internal C-cell
batteries, but it can also run on alkaline or other non-rechargeable C-cells.
To the best of my knowledge, it is up to me to remember what
That makes sense, but it only addresses half of the ESD environment question,
which is how high a potential can something be charged up to, and how long
will it hold the charge. The other half of the question is the
charge-generating mechanism. If the surfaces one walks on are largely metal
or
I read in !emc-pstc that Chris Maxwell chris.maxw...@nettest.com wrote
(in 39f7060a00b5e946b516261c077441c002a...@utexch1w.gnnettest.com)
about 'Rechargeable and Non-Rechargeable batteries' on Wed, 14 Apr 2004:
We generally test our equipment to EN 61010-1. We usually have
rechargeable
In addition to what Mike stated below the chances of an ESD even occurring
in a high humidity environment is less, not to mention the charges of an
even occurring in a high humidity environment will be smaller (ie not
likely to reach 25kV for example).
I agree with the comments made that the
Greetings,
A common product safety symbol, the exclamation point within a triangle, is
used to refer the user to the manual.
General questions:
As a manufacturer, are we covered from any liability as a result of the
user not being aware of what the symbol means? Do we assume that users
Hi Chris:
1. A case designed with a wall wart power input and a spot for AA sized
batteries.
2. The product would be designed to recharge AA sized NiMh batteries,
if installed.
3. Alternatively, the user could install AA sized alkaline batteries;
but they would
Simple thing to do is take an ESD simulator and try charging some objects in
that environment and see if they will hold a charge In high humidity, I'd
expect charges to bleed off very quickly on most objects, which is why the ESD
threat would be low
In low humidity, of course, the charged
Greetings,
Nokia Enterprise Mobility Systems has an opening for an experience technician
in Mountain View, CA.
Primary responsibility
The set-up of equipment for compliance and reliability testing. As such,
knowledge of commissioning networking equipment, primarily Ethernet/IP, is
very
Hello good people of the group.
We generally test our equipment to EN 61010-1. We usually have rechargeable
batteries in our product; and they’ve never really been a safety problem,
other than adding diodes and “approved” charging methods. Usually the
batteries that we use are so oddly
Esteemed List Members,
I am working a problem where it would be helpful to define an ESD threat
level in a particular high humidity, metallic surroundings environment -
expectation is that ESD levels would be much lower than typical. I have a
very high level concept of how it might be done,
I read in !emc-pstc that Jan Vercammen jan.vercamm...@agfa.com wrote
(in ofdcf4c49e.94e1a38a-onc1256e76.004f83c3-c1256e76.004fc...@agfa.com
) about 'zincor EMI contact' on Wed, 14 Apr 2004:
Because it is lower in the electrochemical table zinc oxide will protect
the iron.
No, it doesn't work
__
emc-pstc list,
I have a question concerning Zincor, which I think is a trade name for
steel coated with zinc. The zinc will protect the steel (iron) from oxidation.
Because it is lower in the electrochemical table zinc oxide will protect the
iron.
The steel is coated
Peter,
NOTE: THIS EMAIL DOES NOT REPRESENT THE POLICY OR OPINION OF MY EMPLOYER.
Thanks for your thoughtful response. Based on the many responses that I have
received both on and off-line, it is evident that much of the compliance
engineering community is now faced with NCBs and NRTLs that are
I read in !emc-pstc that Fred Townsend f...@dctolight.net wrote (in
407c73c3.1080...@dctolight.net) about 'laminated capacitor source' on
Tue, 13 Apr 2004:
I don't understand. Xc and ESR are not normally related to each other. Are
you
using modern math?
It's an example of Q = 10^-6.
--
At 11:50 AM -0700 4/13/04, Fred Townsend wrote:
John Woodgate wrote:
I read in !emc-pstc that Chris Maxwell
mailto:chris.maxw...@nettest.comchris.maxw...@nettest.com wrote
(in
mailto:39F7060A00B5E946B516261C07744
c002a...@utexch1w.gnnettest.com39F706
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