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From: Dan Mitchell [mailto:dan_mitch...@condordc.com]
Sent: Wednesday, June 28, 2000 3:52 PM
To: Peter Tarver
Cc: emc-p...@ieee.org
Subject: RE: UL1950/UL2601 Thermals
Fine and dandy, but when do you draw the line. If you have a product that
slowly increases at less than the 1 deg C in 15 minutes a
mitch...@condordc.com]
> Sent: Wednesday, June 28, 2000 6:52 PM
> To: Tarver, Peter [SC1:4N02:EXCH]
> Cc: emc-p...@ieee.org
> Subject: RE: UL1950/UL2601 Thermals
>
>
>
>
> Fine and dandy, but when do you draw the line. If you have a product that
> slowly inc
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dealt with over the years. It should be stated explicitly but it's not.
Gary
-Original Message-
From: Kazimier Gawrzyjal [mailto:k...@nortelnetworks.com]
Sent: Wednesday, June 28, 2000 10:21 AM
To: 'Dan Mitchell'; emc-p...@ieee.org
Subject: RE: UL1950/UL2601 Thermals
Hi Da
That's really just a rule of thumb. A working premise that provides
reasonable results in a relatively short time. As Kaz mentioned, it's not
uncommon for some circuits/parts to exhibit a cycling of temperature, either
by cyclical loads presented to them or some form of (generic) limiting
circuit
.@ieee.org
Subject: RE: UL1950/UL2601 Thermals
Regarding UL1950, IEC950, etc. I can't find proof either. Although I have
been told by several agencies the same thing 1 degree C over 15 minutes. I
too am curious to see this in writing.
Josh
-Original Message-
From: Dan Mitchell [ m
Regarding UL1950, IEC950, etc. I can't find proof either. Although I have
been told by several agencies the same thing 1 degree C over 15 minutes. I
too am curious to see this in writing.
Josh
-Original Message-
From: Dan Mitchell [mailto:dan_mitch...@condordc.com]
Sent: Wednesday, June 2
Hi Dan,
The guideline you've mentioned below is one that I've heard from UL and CSA
in the past and have applied within the realm of engineering
judgement/common sense as much as possible without much issue. It is
reasonable to expect that ambient temperature may fluctuate somewhat in pace
with t
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