Hello All,
Have heard from some sources that surge-suppressors (Varistors, MOVs,
Tranzorbs, etc) are not allowed between Line to Ground, in EN 60950
products, except perhaps for permanently mounted, wired-in equipment. The
concern seems to be that of increased leakage-current over time.
Looking
Martin,
I worked on a 30 m site with sheet metal ground plane last year. It got to
45 deg C several times during the summer and it was HOT. I also got
snowblind from the glare. This ground plane was spot welded along the
seams, had great site attenuation characteristics and seemed to hold up
w
Good Day List,
We are considering replacing our "barn" and I would prefer not
to use wood for the new structure. I am seeking information
on alternate materials / construction techniques as well as
vendors of turnkey solutions.
Thanks in advance for any he
John,
I had been using an HP 8591A with EMI options for 5 years. Saw the new HP 8591
EM and wanted it. but what to do with my old one? The boss wouldn't let me
spend $$$ for a new one when the old one still worked. So my HP salesperson
arranged to have Telogy buy my old one for a really good pr
I once inherited an outdoor aluminum ground plane 10m OATS. The
contraction and expansion was quite evident and out of spec. We ended
up sawing slots to relieve the TCE warp. The slots 12 inches each, 8
of them per 4'x8' section were aligned in the same direction as to the
Hello everyone,
I'm looking for a leakage tester which can measure the low currents of the
medical
standards (e.g. 601)
Can you suggest one (including manufacturer, approximate cost, service quality
etc)
thanks
-
Name: moshe valdman
E-mail: mvald...@netvisio
Greetings All!
Just a quick note on test equipment..Be careful if you come accross
HP Spectrum Analyzers for sale, make sure you purchase from a reliable
source. There have been several recent robberies at local test labs,
where ony HP 8566Bs were taken. So, there are stolen units
In response: IEC 417 Series entitled "Standards for Graphic symbols For
Use on Equipment" may be of assistance.
C. Johnson
CSA
email: johns...@csa.ca
You Wrote:
>>> 08/05/97 08:06am >>>
Greetings Friends,
As technology grows, and the push is for "user friendly" interfacing
Dear Martin,
Using stainless steel sheets fastened together with thin strips of the same
will ensure dependable continuity throughout the VCP. I recommend fastening
the sheets of S.S. together using flathead sheet metal screws. I would
recommend against using solder or braze.
Our laboratory
Georg,
My representative from LGA America did a little research for me some time
ago about leakage current as associated with prEN50178. The research was on
the 1994 issue of the standard but it still applies in the 1995 issue.
The results are based on section 5.2.11.1 of the standard:
1) Fo
We have had great results using hardware cloth, overlapped about 5cm or
more and spot soldered every 20cm or so with a heavy duty soldering iron.
Our oats site has shown no deterioration in the last 5 years of existence.
Very inexpensive. I don't know if the same material is available in Australia
I am trying to decide how much backup battery capacity I should have in a
particular product for the home environment. The only purpose of the battery is
to allow product operation during the more common (hopefully short) power
outages.
Could anyone point me in the direction of data about the
Hello,
please find attached the information from my database.
Kind regards
Andreas Thomas
EPPS
Toshiba Europe
andre...@toshiba-teg.com
> --
> Von: Georg M. Dancau[SMTP:dan...@compuserve.com]
> Gesendet: Dienstag, 12. August 1997 19:13
> An: emc-pstc discussion group
> Betre
Environmental ambients are also a problem on OATS testing. Getting to
know the environmental ambient profile helps. If you have a receiver
with A-B trace capability, you can do a rough check by scanning with and
without the UUT powered, and subtracting the scans, theoretically
subtracting out the
plane
I don't think galvanized materials are very good for a uniform conductive
surface. Zinc forms a 'self-protective' oxide barrier which is terrific
for protection against the elements. Unfortunately the oxide thickness is
somewhat variable which results in a very variable surface resistivit
A friend of mine is getting out of the EMC Business and has all of his
equipment up for sale. His name is Dick Heaton. His company is
Midwest EMC Measurements. He can be reached at 937-667-3467 Voice or
937-667-6180 fax.
Jim Bacher
Senior Engineer, Monarch Marking Systems, Inc.
email: j...@m
Hello Gordon,
Indeed most of the environment is coming from within the building, is
unpredictable, changes during the day, and sometimes has frequencies similar or
identical to the UUT (since some of it is generated by similar equipment).
The TV/Radio type of environment is normally not the proble
Hello Gordon,
Indeed most of the environment is coming from within the building, is
unpredictable, changes during the day, and sometimes has frequencies similar or
identical to the UUT (since some of it is generated by similar equipment).
The TV/Radio type of environment is normally not the proble
Hi compliance folks
Does anybody have information about the status of prEN50178.
This standard specifies some measures which must be taken if the leakage
greater than
3.5 mA (clause 5.2.11).
Best regards
George
--
**
* Dr. Georg M. Da
Hi Gang,
We are currently building another OATS and are looking into the most
cost & time effective way of achieving a uniform conductive groundplane
without using mesh. Does anyone have experience with using galvanised
metal sheet, and if so, the best method to join the sheets together
(
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