So rather than educating the public on the cause of flicker, we get saddled
with a useless design requirement. Typical bureaucracy - don't fix the
problem, make it LOOK like you're doing something, at someone else's
expense. Just like the harmonics standard - fix a problem that doesn't
exist.
cecil.gitt...@kodak.com 18-Jan-02 1:20:16 PM
From: Cecil A. Gittens
If someone has a pacemaker and wants to use a APS Camera with an internal
clock 8MHz
on the main CPU circuit board.
My question is it safe for that person to use the APS Camera
Reply:
APS camera is a traditional 35mm
I read in !emc-pstc that Ken Javor ken.ja...@emccompliance.com wrote
(in 20020121193650.LDSV11289.femail7.sdc1.sfba.home.com@[65.11.150.27]
) about 'EN 61000-3-3 compliant heater controller', on Mon, 21 Jan 2002:
I have some questions which are just for my own education. I understand Mr.
John,
Or another example where different companies' equivalent parts are not
equivalent-- this is one that I ran into in 1977. I had designed a
Power-On-Reset (POR) circuit using a 555 timer, and had tested the circuit on a
solderless breadboard. I was being sneaky in my design, and used the
To all of you who responded, here is the latest info.
I have picked up the following:
1. 15000 units have been placed on the marked and 2 complains have been
reported to the Telecommunications Authorities. They could not produce any
evidence that the PLC made the problems, but they were
I have some questions which are just for my own education. I understand Mr.
Woodgate's comments and they make sense to me. But I wonder why there is a
problem in the first place. I believe all power in Europe is at 200 Volts
or higher, which makes an 800 Watt heater a four Amp device. I don't
Hi Folks
Could this ON Semiconductors problem be something to do with:
a) The fact that the neutral is generally not at ground potential, but has
floated up due the current flowing in it?
or
b) The actual PSU has a filtering arrangement that is non-symmetrical wrt
true ground?
Zero Crossing QuestionJohn,
I think you already have the answer to the problem. You stated that Harris
or Intersil IC's work properly regardless of the mains polarity. Some years
back I had an issue where another manufacturer's replacement was substituted
for a Sprague ULN2003 Darlington Array
It is well known in the medical device community that the immunity standards
for implanted medical devices and the emissions standards for electrical
devices are not compatible. Pacemakers have an operations mode that is used
when excessive noise is detected. That mode goes by several names
Hi Group,
Our manufacturing personnel encountered a strange problem: when the
mains plug used on a
230V/50Hz equipment that has an internal zero crossing reference
integrated circuit (specifically,
a CA3059) is reversed (this can occur in countries such as Germany,
Italy, France and
Dear all
Following comments made in the correspondence on 'EMC-related safety issues'
early in January I asked for everyone who was interested to read at least the
beginning of the IEE's guide and let me know their opinions.
Also to ask their colleagues and anyone else who might be interested.
Dear John
Sorry to be so late replying.
I am pleased that you now understand the situation that I attempted to
describe earlier, where an HCMOS inverter with an unterminated input was the
cause of surprisingly powerful radiated emissions at 200MHz, due to an
unfortunate, unlikely, but not
Dear Bob
Sorry to be so late replying.
Thank you for this reference, I was unaware of it.
I shall add it to my list of EMC-related safety references.
If anyone wants a copy of my list, I'll be pleased to email it to them in
Word format.
If anyone knows of any books, articles, or papers on the
Hi,
I would like to know about India reguration for EMC Radio.
Please give me the information.
Tetsuya Hashimoto
A-PEX International Co., Ltd.
---
This message is from the IEEE EMC Society Product Safety
Technical Committee emc-pstc discussion list.
I think that is possible find something on the directive 99/44/CE
Ciao
Paolo
At 16:42 1/17/02 -0500, Michael Gusel wrote:
Dear Group,
I am looking for CE rules (Directive, Article, ...) for maximum period of
time that the manufacturer must provide repair and service after the
equipment has
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