Hello from San Diego:
Kevin Harris asks some questions about temperature
measurements.
1. Is this a valid temperature measurement for the PCB? I'm of two minds
on this. It could said that I'm really measuring the diodes temperature
and not the PCB. On the other hand the diode pad
...@compaq.com
To: 'dmck...@paragon-networks.com'; 'IEEE Product Safety Technical
Committee -' emc-p...@majordomo.ieee.org
Subject: RE: EN 60950 and component heating
Date: Wednesday, September 17, 1997 4:27 PM
Doug,
To answer your question of which is better:
The primary concern should
Mark:
I don't really think that you'd want to have a shiny, conductive piece of
aluminium foil bouncing around inside your power supply, shorting things
out and compromising your spacings. These self-adhesives don't last too
long under ageing ...
Cheers,
Egon :-)
Hello Kevin,
The heating test performed on your PCB is to verify the compliance of the
PCB usage. In some cases, the temperature on the body of non-safety
critical components must verify to determine the appropriate spacing of the
surrounding components, such as wires (rated 105) or capacitors
Subject: EN 60950 and component heating
Date: Monday, September 15, 1997 6:14 PM
Hello All,
In testing some product for excessive temperatures I have come up
against the following problem. Consider a diode (part of a bridge
rectifier circuit) and the PCB underneath the component. If one
Product Safety Technical Committee -
Subject:Re: EN 60950 and component heating
Hi Kevin,
I had a rather bad experience between UL and CSA in
the older days when there wasn't so much discussion
and agreement between them. I had set up an MOU
between them with UL as the test location
Hello All,
In testing some product for excessive temperatures I have come up
against the following problem. Consider a diode (part of a bridge
rectifier circuit) and the PCB underneath the component. If one measures
the temperature of the diode it does not come close to the specification
for the
___
From: Kevin Harris on Tue, Sep 16, 1997 12:35 AM
Subject: EN 60950 and component heating
To: EMC-PSTC (E-mail)
Hello All,
In testing some product for excessive temperatures I have come up
against the following problem. Consider a diode (part
To add to Art Michael's ways used to work around the problem of PCBs
getting too hot, if the heat is being radiated (rather than conducted
through the leads) from the component to the PCB, put a shiny reflective
surface on the PCB (self adhesive aluminium foil, or just an area of
copper on the
...@ieee.org};
JEichner; bceresne
Subject: EN 60950 and component heating
Hello All,
In testing some product for excessive temperatures I have come up
against the following problem. Consider a diode (part of a bridge
rectifier circuit) and the PCB underneath the component. If one measures
).
--
From: Kevin Harris
To: EMC-PSTC (E-mail)
Subject: EN 60950 and component heating
List-Post: emc-pstc@listserv.ieee.org
Date: Monday, September 15, 1997 3:14PM
Hello All,
In testing some product for excessive temperatures I have come up
against the following problem. Consider a diode (part
Hello Kevin,
This is not an uncommon problem as you have probably guessed. Rather than
get embroiled in discussing the details of what one should measure, I'd
rather offer a couple of ways I've seen used to work around the problem.
A) Assuming you are using leaded diodes; Raise the diode off of
12 matches
Mail list logo
