How can I know the maximum magnetic field a device can cope

M

Merciadri Luca

Guest
Hi,

I would like to know, for some devices that I have (e.g. PDA,
calculator, etc.), the maximum magnetic field they can cope with. How
can I know it, without testing (obviously), and if no such information
are displayed on the device's sheet? Thanks.
 
"Merciadri Luca"
I would like to know, for some devices that I have (e.g. PDA,
calculator, etc.), the maximum magnetic field they can cope with.
Click to expand...
** Why don't you post details of the actual scenario you are considering ??

What IS the source of your imaginary magnetic field ??

A loudspeaker magnet or an MRI machine ???


How
can I know it, without testing (obviously), and if no such information
are displayed on the device's sheet?
Click to expand...

** It's not specified cos there is no meaningful way to specify such a thing
and very few people would be the least bit interested.



...... Phil
 
On May 15, 5:10 am, "Phil Allison" <phi...@tpg.com.au> wrote:
"Merciadri Luca"



I would like to know, for some devices that I have (e.g. PDA,
calculator, etc.), the maximum magnetic field they can cope with.

** Why don't you post details of the actual scenario you are considering ??

  What  IS  the source of your imaginary magnetic field ??

  A loudspeaker magnet or an  MRI  machine ???
Not MRI machines, evidently, but I have one calculator and one PDA,
Click to expand...
and both could be important for me at work. If I have to work in an
environment where the magnetic field is intense, and that I carry
them, I do not want them to be broken in some way. I can't foresee the
place where I am going to work at, but I can predict that if the
magnetic field is too important (i.e. special plant), my devices won't
resist to it.

** It's not specified cos there is no meaningful way to specify such a thing
and very few people would be the least bit interested.
Why? The wrapper device's shells are known, and the chemical and
Click to expand...
physical properties of these shells are known. Experimental, or at
least theoretical measures can be done to know, at least
approximatively, the maximum magnetic field the different devices can
cope with. This looks like an important characteristic of a device,
especially if this device is an engineering device. How can you go to
some plant with high magnetic fields (i.e. physics research, etc.),
carry your personal devices, and know if they are still going to work
there, or at least if they are not going to be broken, or undergo data
corruption?
 
"Merciadri Luca" <merciadriluca@gmail.com> wrote in message
news:51f7d735-f6a4-4b77-b828-413c8bd320d5@o12g2000vba.googlegroups.com...
On May 15, 5:10 am, "Phil Allison" <phi...@tpg.com.au> wrote:
"Merciadri Luca"
Click to expand...
Why? The wrapper device's shells are known, and the chemical and
physical properties of these shells are known. Experimental, or at
least theoretical measures can be done to know, at least
approximatively, the maximum magnetic field the different devices can
cope with. This looks like an important characteristic of a device,
especially if this device is an engineering device. How can you go to
some plant with high magnetic fields (i.e. physics research, etc.),
carry your personal devices, and know if they are still going to work
there, or at least if they are not going to be broken, or undergo data
corruption?

Wouldn't there be restrictions on what you could bring into these areas?
You really can walk around with things in your pocket anywhere you want?
 
On May 15, 3:18 pm, "Tom Biasi" <tombi...@optonline.net> wrote:
"Merciadri Luca" <merciadril...@gmail.com> wrote in message

news:51f7d735-f6a4-4b77-b828-413c8bd320d5@o12g2000vba.googlegroups.com...
On May 15, 5:10 am, "Phil Allison" <phi...@tpg.com.au> wrote:

"Merciadri Luca"

Why? The wrapper device's shells are known, and the chemical and
physical properties of these shells are known. Experimental, or at
least theoretical measures can be done to know, at least
approximatively, the maximum magnetic field the different devices can
cope with. This looks like an important characteristic of a device,
especially if this device is an engineering device. How can you go to
some plant with high magnetic fields (i.e. physics research, etc.),
carry your personal devices, and know if they are still going to work
there, or at least if they are not going to be broken, or undergo data
corruption?

Wouldn't there be restrictions on what you could bring into these areas?
You really can walk around with things in your pocket anywhere you want?
Click to expand...
Yes, but it might be shown `only devices coping with magnetic fields
<= x T can be brought here', and you do not know what you can do, in
this case, because you do not know the magnetic fields your devices
can cope with. It is not always said `don't bring your calculator or
any device here.'
 
On May 14, 2:11 pm, Merciadri Luca <merciadril...@gmail.com> wrote:

I would like to know, for some devices that I have (e.g. PDA,
calculator, etc.), the maximum magnetic field they can cope with. How
can I know
Click to expand...
Good question: the easy answer is, they have to tolerate 0.5 gauss
(which is kinda the background field on much of Terra). Slight
exception: CRT displays are commonly tuned up aimed in
magnetic N direction, and DO change according to orientation.

Static B fields also disable photomultipliers and, if strong enough,
saturate magnetic elements (causing distortion of signals, or can
pop fuses attached to power inductors). Dynamic B fields cause
EMFs in most wiring (hopefully, though, not coaxial cables). I've
even heard of transient B fields damaging woodwork, but that was
a big fast current switch that made cables jump. The folk who shrink
pennies are demonstrating the structural failure of metal disks with
high B field transients...
 
"Merciadri Luca"
"Phil Allison"
"Merciadri Luca"
I would like to know, for some devices that I have (e.g. PDA,
calculator, etc.), the maximum magnetic field they can cope with.

** Why don't you post details of the actual scenario you are considering
??

What IS the source of your imaginary magnetic field ??

A loudspeaker magnet or an MRI machine ???
Click to expand...
Not MRI machines, evidently, but I have one calculator and one PDA,
and both could be important for me at work. If I have to work in an
environment where the magnetic field is intense,

** Really ??

Explain what the source is or go drop dead - you stupid damn TROLL.



** It's not specified cos there is no meaningful way to specify such a
thing
and very few people would be the least bit interested.
Click to expand...
Why?

** Try reading what I wrote - shit head.

" It's not specified cos there is no MEANINGFUL way to specify such a
thing
and VERY FEW people would be the least bit interested. "


Explain what the source YOU have is or go drop dead.



..... Phil
 
Phil Allison wrote:
"Merciadri Luca"
"Phil Allison"
"Merciadri Luca"

I would like to know, for some devices that I have (e.g. PDA,
calculator, etc.), the maximum magnetic field they can cope with.

** Why don't you post details of the actual scenario you are considering
??

What IS the source of your imaginary magnetic field ??

A loudspeaker magnet or an MRI machine ???

Not MRI machines, evidently, but I have one calculator and one PDA,
and both could be important for me at work. If I have to work in an
environment where the magnetic field is intense,

** Really ??

Explain what the source is or go drop dead - you stupid damn TROLL.

** It's not specified cos there is no meaningful way to specify such a
thing
and very few people would be the least bit interested.

Why?

** Try reading what I wrote - shit head.

" It's not specified cos there is no MEANINGFUL way to specify such a
thing
and VERY FEW people would be the least bit interested. "

Explain what the source YOU have is or go drop dead.

.... Phil
Click to expand...

Go take your medicine, Phillis. This is news:sci.electronics.basics
not news:aus.sheep.shaggers.toaster.molesters


--
Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.
 
"Merciadri Luca"
"Phil Allison"

I would like to know, for some devices that I have (e.g. PDA,
calculator, etc.), the maximum magnetic field they can cope with.

** Why don't you post details of the actual scenario you are considering
??

What IS the source of your imaginary magnetic field ??

A loudspeaker magnet or an MRI machine ???
Click to expand...
Not MRI machines, evidently, but I have one calculator and one PDA,
and both could be important for me at work. If I have to work in an
environment where the magnetic field is intense,

** Really ??

Explain what the source is or go drop dead - you stupid damn TROLL.
--------------------------------------------------------------------------------


** It's not specified cos there is no meaningful way to specify such a
thing and very few people would be the least bit interested.
Click to expand...
Why?


** Try reading what I wrote - shit head.

" It's not specified cos there is no MEANINGFUL way to specify such a
thing and VERY FEW people would be the least bit interested. "


Explain what the source IS or GO DROP DEAD !!!

You DAMN TROLL !!



..... Phil
 
On May 16, 2:10 am, whit3rd <whit...@gmail.com> wrote:
On May 14, 2:11 pm, Merciadri Luca <merciadril...@gmail.com> wrote:

I would like to know, for some devices that I have (e.g. PDA,
calculator, etc.), the maximum magnetic field they can cope with. How
can I know

Good question:  the easy answer is, they have to tolerate 0.5 gauss
(which is kinda the background field on much of Terra).   Slight
exception: CRT displays are commonly tuned up aimed in
magnetic N direction, and DO change according to orientation.

Static B fields also disable photomultipliers and, if strong enough,
saturate magnetic elements (causing distortion of signals, or can
pop fuses attached to power inductors).   Dynamic B fields cause
EMFs in most wiring (hopefully, though, not coaxial cables).  I've
even heard of transient B fields damaging woodwork, but that was
a big fast current switch that made cables jump.   The folk who shrink
pennies are demonstrating the structural failure of metal disks with
high B field transients...
Click to expand...
Thanks.
 
"Merciadri Luca"

Thanks.

** FUCK OFF !!!!!!!!!!!!!!

you fucking stupid WOG TROLL



.... Phil
 
BobG wrote:

Mister Luca... Welcome to the sci.electronics.basics Club of The
Initiated who have been cursed by good ol Phil from Down Under. He has
probably singlehandedly done more damage to Austrailian International
Relations with engineers worldwide than a whole cruise ship full of
loud rude Yanks with flowered shirts. Man am I glad he aint an
American. I have enough of a problem defending capitalism to domestic
socialists without having to defend bipolar sociopaths that are rude
to perfectly polite strangers. I bet the next message is him telling
me I have symptoms of Autistic Spectrum Disorder...
What's wrong with noisy yanks and flowered shirts?
Click to expand...

Jamie.
 
Go down to T-mobile and get an Android phone. They have a 3 axis
magnetometer so they can find north no matter which way the phone is
oriented, and show the map right side up. The specs say it is
sensitive to 7000 micro teslas or something. I cant find the specsheet
right now darnit. I wonder if you could put the phone in an mri turned
off, shoot it, take it out and have it work?
 
Mister Luca... Welcome to the sci.electronics.basics Club of The
Initiated who have been cursed by good ol Phil from Down Under. He has
probably singlehandedly done more damage to Austrailian International
Relations with engineers worldwide than a whole cruise ship full of
loud rude Yanks with flowered shirts. Man am I glad he aint an
American. I have enough of a problem defending capitalism to domestic
socialists without having to defend bipolar sociopaths that are rude
to perfectly polite strangers. I bet the next message is him telling
me I have symptoms of Autistic Spectrum Disorder...
 
On Sat, 15 May 2010 03:56:15 -0700 (PDT), Merciadri Luca
<merciadriluca@gmail.com> wrote:

On May 15, 5:10 am, "Phil Allison" <phi...@tpg.com.au> wrote:
"Merciadri Luca"



I would like to know, for some devices that I have (e.g. PDA,
calculator, etc.), the maximum magnetic field they can cope with.

** Why don't you post details of the actual scenario you are considering ??

  What  IS  the source of your imaginary magnetic field ??

  A loudspeaker magnet or an  MRI  machine ???
Not MRI machines, evidently, but I have one calculator and one PDA,
and both could be important for me at work. If I have to work in an
environment where the magnetic field is intense,
Click to expand...
Can you define "intense"?

John
 
On 5/18/2010 1:05 PM, John Larkin wrote:
Not MRI machines, evidently, but I have one calculator and one PDA,
and both could be important for me at work. If I have to work in an
environment where the magnetic field is intense,

Can you define "intense"?
Click to expand...
Certainly. It's where one sleeps at night when camping....

Bob M.
 
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