Curt,
You might wish to check out Nancy Levison's book, Safeware: System Safety
and Computers
She is one of the primer authorities on software safety in the country, if
not the world.
She addresses the Therac 25 incident in her book, not necessarily from an
ethical point of view but after
Ken Javor wrote:
It is not coincidence that the excuse for imposing these controls during
nominal peace time is a crisis advertised to once again doom civilization -
global warming. The would-be Overlords, who are in reality Untermensch,
fully recognize that a crisis of global proportions is
A more basic question. Would Edison? slight bulb have ever illuminated
the night if an environmental impact statement had predicted the
electrical power infrastructure necessary to support it, and the
resultant ?man-made global warming??
When measured against the emissions of the candles, oil
One of our vendors is looking for test equipment for the IEC-320-1, Clauses
16.2 and 16.3, Withdraw Force Tests.
It is illustrated in Figure 12 of the same standard.
We have such a tester but it is decades old and before my time.
Does anyone know where such a device can be purchased?
Oscar
Richard,
Another good one is http://www.freetranslation.com/;.
I usually translate the same text using both and compare the differences.
There usually are some.
I find this one easier to use when translating from another language into
English if you are having to type text directly as it has
Everyone,
Does anyone know of any product safety standards that apply to digital cameras?
The simple, personal, AA battery powered type of digital cameras.
Thank you.
Oscar Overton
Ph: 859-232-2284
---
This message is from the IEEE EMC Society
Jim,
This also can be affected by the cordage that comes with an appliance.
We have a refrigerator with the ground pin at the bottom. It has to be plugged
in that way because the plug is designed to lay flat against the wall. To put
the plug in the other way would cause the cord to come out
Sounds like the pointy haired must have written it ! !
Cortland Richmond 72146.373%compuserve@interlock.lexmark.com on 07/09/2002
01:06:52 PM
Please respond to Cortland Richmond
72146.373%compuserve@interlock.lexmark.com
To: ieee pstc list
I think that we all need to get a grip on our job title envy.
If all one is his/her job title then that person is in a heap of trouble,
especially in today's job market.
I was a GI for 23 years. Does anyone know what that means? Government
Issue
That didn't change who I was/am. Nor did it
Chris,
Go to the following site and it explains it very well with examples.
http://www.ul.com/mark/index.html
The information not covered are the :
product type (e.g., I.T.E.) (there is a lot of variation allowed
here),
4 character Listing Mark Control Number (LMCN) which is a
To add a bit to Rich's comment.
The Argentina and China (PRC) plugs have polarized plugs that are very
similar to Australian style (without a caliper it is hard to tell the
dimensonal differences). The PRC plugs are the same as the Australian
polarization while the Argentina plugs are opposite
Check out this website for power requirements, plug styles, and languages.
Look under South Korea for Korea.
ftp://ftp.lexmark.com/pub/networking/internat.htm
---
This message is from the IEEE EMC Society Product Safety
Technical Committee emc-pstc
Imagine that, holding someone accountable for their own actions!
What a novel concept.
I doubt it would ever be accepted in the US.
MOO
J.Feldhaar j.feldhaar%telejet...@interlock.lexmark.com on 01/10/2002
08:00:52 AM
Please respond to J.Feldhaar j.feldhaar%telejet...@interlock.lexmark.com
Because of the different mains plugs required in the different countries I have
never seen much advantage to universal cordage.
The one exception to this is a jumper cord that has an IEC320, C-13 connector
on one end and a C-14 connector on the other.
This type of power cord is independent of
In the spirit of the season:
John wore clothing made of camel's hair, with a leather belt around his waist,
and he ate locust and wild honey.
Matthew 3:4, Mark 1:6
There are, however, some winged creatures that walk on all fours that you may
eat: those that have jointed legs for hopping on
This particular labeling of Nut products is not an isolated event.
Pick up viturally any container of mixed nuts and it will have a similar
warning.
Of course don't start reading too many food labels, it can get really scary.
FDA's Food Alergen page is:
The Board of Certified Safety Processionals used to have a Certification
Specialty in Product Safety.
There was so little interest in it that it was dropped. The closest that they
have now is a Specialty in System Safety.
Just like Dan says below about the requirement for PEs to sign off
Mike,
Tania hits the nail on the head with her comments.
Something that I find useful in this situation is a Process Flowchart. These
can be used for more than just chemical production.
It more graphically illustrates the processes, interrelationships, and possible
sequencing involved,
I cannot confirm the following statement but I have attached a link identifying
the actual event.
Here, supposedly, is a quote from a Petrobras executive extolling the benefits
of cutting QA and inspection cost on the drilling/production platform project
that sunk into the Atlantic Ocean off
Gregg brings up a good point.
I haven't followed all of this thread and I hope I'm not repeating someone else;
but, just in case:
Some of the things necessary to comply with the standards have less to do with
safety than they do with compliance to the standard.
Or in some cases the safety
Just don't let your ESH people see you standing on a chair to perform this
test. ; )
Scott Lacey scottl%world.std@interlock.lexmark.com on 09/25/2001
05:38:44 PM
Please respond to Scott Lacey scottl%world.std@interlock.lexmark.com
To:
Patty,
Here is a little something that I put together previously to give to some of our
folks when they asked the same question.
I found it has saved a lot of time in having to present it every time I'm asked
the question.
(See attached file: Why NRTL Required - Generic.doc)
Oscar
(The usual
I have noticed several responses related to the smell of the old equipment.
I had been thinking the very same thing.
You could trouble-shoot by the type of smell a failed component produced (cap
vs. resistor, vs choke, etc.)
Ever notice how connected one's memory and smells are connected?
Two quotes for which I can not give attribution.
That that does not kill me, makes me stronger.
That that does not kill me, only delays the inevitable.
Nerad, Daren HS-SNS daren.nerad%hs.utc@interlock.lexmark.com on
07/30/2001 04:13:20 PM
To: 'oover...@lexmark.com'
Actually there are many meanings for PDU. Here are those listed in a web site
of acronyms (http://www.acronymfinder.com/).
Acronym Definition
PDU Packet Data Unit
PDU Parachute Deployment Unit
PDU Philippine Digital Upgrade
PDU Photographic Development Unit (RAF)
PDU Pilot Display Unit
I find it interesting the example that was given here as contrasting with
another case this site also has.
http://www.injurycases.com/news.html
This case is quite different and from my perspective exemplifies the problem we
have been discussing here.
At what point must you take responsibility
In light of the recent e-traffic on labels, warnings, and litigation I think
that this is a good article.
A better rant than I could write (and have written). When you need a break ...
___
By Mark Morford
morning...@sfgate.com
All
Judd,
Thanks for the comment.
We intend to keep the information at its present site until a more permanent
site is available.
This new site will be provided by the emc-pstc folks. It is not in operation
yet but stay tuned as I'm sure they will announce it when it does happen.
Like I said
Luis,
Try the following site. We are not trying to sell anything, just provide
information.
ftp://ftp.lexmark.com/pub/networking/internat.htm
We would appreciate any feedback on your assessment of the site.
Any way to improve it would be appreciated.
Oscar
Luiz Claudio
Let me interject a bit here.
In the introduction the System Safety Analysis Handbook, published by the
System Safety Society (http://www.system-safety.org/),
it identifies a hazard control precedence for not only minimizing risk due to
the hazard itself, but also to minimize the chances of
This is a great idea. Thx.
A similar approach, used a lot in U.S. government documents, is to state the
acronym in parentheses immediately after the first use and then just use the
acronym throughout the rest of the document as if everyone knows what it means.
(i.e., When setting up the
FWIW - HTH
A couple of others I have encountered.
Not in alphabetical order but more in context order.
AFAIK, probably too many to really be beneficial.
NRN
OO
TLA - three letter acronym
IAW - in accordance with
IMCO - in my considered opinion
IMNSHO - in my not so humble opinion
FTHP - faster
I once read a safety article (tongue-in-cheek I believe) that said that the
safety industry was weaking the species by allowing the weak and feable to
continue exist and procreate. I believe that this was directed toward the
mentally weak and feable (read stoopid).
By warning them about
Re:Rick Busche's question.
We all probably agree that a phase to neutral connection is single phase and
devices that use all three phases, whether they are 208V 60Hz or 400V 50Hz,
are truly three phase. The discussion heats up when you are talking about a
phase to phase connection on a three
Chris,
There may be some hungry NRTLs or some that have existing cooperative
agreements with another NRTL, but would you take complete responsibility and
liability to sell a product under your name that another company designed and
tested by taking their word that everything was OK with the
My two cents . . .
And many of those related to part failure are still related to human error.
There is some evidence that the Firestone problem is related to under inflated
tires which is a driver responsibility.
This doesn't even address the faulty maintenance that causes accidents that may
You can go to the following site: http://www.comm-2000.com/;
This is the new UL vendor for standards.
UL 60950 is at the bottom of the following page:
http://www.comm-2000.com/ULstandard7.asp?PassCondition=ALLPages=16;
Took me about a week to get one in the mail and they also have electronic
From the UL Test Data Sheets provided to me by my UL engineering office, the
material listed in the text of the test data sheet is kerosene.
I don't know what the actual physical characteristics are, but if UL uses this
for their test I would assume that it is acceptable for me to use.
Kerosene is
This is also the Risk Assessment matrix that all military services and several
other government agencies used in program/product development.
It is included in Mil-Std-882D, DOD Standard Practice for System Safety -
released February 2000.
System Safety is generally the equivalent to Product
This was quite a moooving exchange.
Gert was obviously on the horns of a dilema.
Even though there was a lot at steak, I believe that Gert was steered in the
right direction.
In addition to the voltage, the current would depend on whether your beef was
ground(ed) but you can't hide from the real
Randy,
I know that you already received a couple of sites but I've noticed that
different sites have different data.
Most of it is in agreement but some of it is not. Here are several that I use
to compare.
http://www.panelcomponents.com/guide.htm
http://www.quail.com/locator/index.html
Luiz,
I am coming from a risk assessment perspective only, not a standards or
regulation one.
What is the worst case result of every device going bad and leaving the heat on?
What is the probability of this occuring?
Base your decision on these points. Where is your limit of risk?
What if the
The question was Do we really have to pay so high price to learn the lesson?
My response is in two parts.
The first one is, as I assume you believe since you ask the question in the
context you did, no -- not really.
The second one is yes, look at history.
I was in the US Air Force for 23 year,
IMNSHO I must disagree.
It is the political influences that cause most of the poor management within
NASA. Granted, you have some senators that are wanting to look good by sticking
their fingers into the NASA business but the NASA higher management is doing the
same in return in order to get
Brian and Group,
Attached is a word document that I used at a prior employeer for doing safety
design analysis.
It was extracted from NIOSH. I don't know if it is still current but I believe
it is.
Here is the NIOSH web site address: http://www.cdc.gov/niosh/homepage.html
(See attached file:
In the introduction to IEC60950 it says:
It is essential that designers understand the underlying principles of safety
requirements in order that they can engineer safe equipment.
The following is not an alternative to the detailed requirements of this
standard, but is intended to provide
I don't know if they still do, but USC, Univ of Washington, and Univ of
Cincinnati used to have some courses in system safety and hazard analysis.
I know that this isn't product safety per se but it does address the issues of
identifying, understanding, and mitigating hazards in engineered
I don't see this issue as one of whether manufacturers meet the standards.
It is more one of whether the standards are adequate.
Now the task becomes one of defining adequate.
We've all see the hatchet jobs that the press or special interest group will do
when they get on a mission.
I'm not sure
I saw a CPS to Hz conversion chart in a military (AF) test report back in the
70s.
The 'X' axis (CPS) was decimal and the 'Y' axis (Hz) was Log.
It provided an interesting conversion curve. It even had a formula to do the
conversion long hand.
We need more of this type of aids today =;
It is allowed but what about the integrity issue?
Do you intend on telling the agency from which you are seeking the opinion of
your approach?
How would you feel about your customers doing the same thing with your opinion?
woods%sensormatic@interlock.lexmark.com on 12/16/99 02:42:26 PM
Does anyone know, or have a reference that might tell, the ignition temperature
of cotton cheesecloth.
UL 1950, Annex B, Clause B.7.3 references the use of this.
I know that the ignition temperature of paper, according to Ray Bradbury is 451
(superscript: o)F
OO
-
This message is
Group,
I have a design engineer with a power supply which is to be powered from 13.8
Vdc automobile source.
Does anyone know of any IEC or other standards for the power plug that goes into
the cigarette lighter / power plug of a vehicle.
Many Thanks.
Oscar
-
This message is coming
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