eric.lif...@ni.com wrote:
>
> So friends, how continuous must DC be to qualify as continuous DC?
Personally, I'd say when the source can deliver some
sufficient level of real power (rms level of power).
That is basically the definition of rms anyway.
To make the point with two ridiculous exa
My experience agrees with yours Gert - there is no simple formula to follow.
In my early days as a PSE I tried to draw a flow-diagram of product safety
assessment and decisions.
On the first line I had about 20 options and each of those dropped down to
about 20 more - many of which interlocked..
From: Douglas Beckwith@MITEL on 11/08/2001 11:09 AM
Sounds like it should be changed to either "Alert", "Note" or similar. Does
anyone know where this requirement comes from?
Regards
Doug
"Robert Macy" on 11/07/2001 08:59:35 PM
Please respond to "Robert Macy"
To: Douglas Beckwith/Ka
Hi Dough, Group,
I agree that is approach is much more simple to understand,
but most definitions up to now have the problem of defining
A LOT of components as safety critical. The safety critical parts
need much more attention then just specification and name it.
They need to be maintained in br
I read in !emc-pstc that douglas_beckw...@mitel.com wrote (in
<85256afd.00759dd5...@kanmta01.software.mitel.com>) about '[Fwd: User
Warning Signal Words]', on Wed, 7 Nov 2001:
>for example in the UK you are required to put
>an EMC Class A "warning" note in the documentation.
This is nothing spec
Couldn't we just go to the front of the UL1950/60950
standard and agree that a "safety critical part or device
or circuit or construction" is simply something used
"...
to prevent injury or damage due to:
- Electric shock hazard
- Energy hazards
- Fire hazard
- Mechanical hazard
- Heat
Perhaps, it's time to utilize "Alert" instead of "Warning" for Class A
compliance information.
- Robert -
Robert A. Macy, PEm...@california.com
408 286 3985 fx 408 297 9121
AJM International Electronics Consultants
619
Don't laugh!! those good ole days are still here.
John Shinn, P.E.
Manager, Laboratory Operations
Sanmina Homologation Services
-Original Message-
From: owner-emc-p...@majordomo.ieee.org
[mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of John Juhasz
Sent: Thursday, November 01, 2001
Us OLD guys used to think that digital was two levels of voltage - back
then +5VDC and 0VDC.
Thus DC could also mean Digital Computers. Way back then, the things did
run relatively slow compared to these days so the AC signal you think of
was only the step function of getting from one level t
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