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Cheap thermometer calibration technique?

S

Sjouke Burry

Jan 1, 1970
0
Martin said:
There are several answers. It really depends if the angles are
latching or non-latching
WRONG ANSWER!!

As long as they have matching spin state, they act as one angel
independent of their count.
 
T

The Pig Bladder from Uranus

Jan 1, 1970
0
WRONG ANSWER!!

As long as they have matching spin state, they act as one angel
independent of their count.

My answer was "All of them". ;-)

Thanks for Playing!

Cheers!
Pig Bladder
 
K

krw

Jan 1, 1970
0
Not to spoil anybody's fun, but the original question that the Schoolmen
were debating was whether an angel--a pure spirit--occupied any space.
The question was not whether it was 1 or 180, but whether it was a
finite or infinite number.

The question morphed a bit along the way.
 
J

Jasen Betts

Jan 1, 1970
0
I once saw a demo on Mr. Wizard where they had water freezing and boiling
simultaneously.

a triple-point aparatus, - that's a good temperature reference for
your thermocouple :) 0.01C
 
J

Jasen Betts

Jan 1, 1970
0
But seriously, how many angels _can_ dance on the head of a pin? >:->

All angels can dance on the head of a pin, devils get the other end!
 
R

Rich Grise

Jan 1, 1970
0
Not to spoil anybody's fun, but the original question that the Schoolmen
were debating was whether an angel--a pure spirit--occupied any space.
The question was not whether it was 1 or 180, but whether it was a
finite or infinite number.
Do an infinite number of angels even exist? (they obviously don't take
up any space, being imaginary and all.)

Cheers!
Rich
 
B

Bob Myers

Jan 1, 1970
0
Rich Grise said:
Do an infinite number of angels even exist? (they obviously don't take
up any space, being imaginary and all.)

But if you don't take up any space, in what sense could
you be said to be "dancing"?

A more important question is where they're keeping the
infinite number of monkeys with typewriters. Those
obviously DO exist; I submit to you, as evidence - the
net.

Bob M.
 
R

Rich Grise

Jan 1, 1970
0
But if you don't take up any space, in what sense could you be said to be
"dancing"?

A more important question is where they're keeping the infinite number of
monkeys with typewriters. Those obviously DO exist; I submit to you, as
evidence - the net.
Well, duh - obviously, that's where the monkeys are! Just look around. ;-)

Cheers!
Rich
 
D

Don Bruder

Jan 1, 1970
0
Rich Grise said:
Well, duh - obviously, that's where the monkeys are! Just look around. ;-)

Cheers!
Rich

Every third poster on Usenet is actually a monkey. Look left. Look
right. Don't see a monkey? Where's that leave you? :)
 
P

pol

Jan 1, 1970
0
An IR thermometer will not be very accurate on lower as body temps due
to the radiation measured.


An IR is good for above 50 F or 25 C
Calibration is best done close to the temps really measured.
And yes boiling and freezing water is very accurate and the method
with the black body is best.
 
G

GregS

Jan 1, 1970
0
An IR thermometer will not be very accurate on lower as body temps due
to the radiation measured.


An IR is good for above 50 F or 25 C
Calibration is best done close to the temps really measured.
And yes boiling and freezing water is very accurate and the method
with the black body is best.


I noticed that my typical Fluke IR thermometer only works at room
temperature. I took it outside last winter, and after the unit starts
to cool, forget it.

greg
 
A

Archimedes' Lever

Jan 1, 1970
0
An IR thermometer will not be very accurate on lower as body temps due
to the radiation measured.


Anything above absolute zero emits InfraRed radiation.

IR thermometers are calibrated for a very small temperature window,
compared to the span of what is available. From low temps to high temps,
many models are available. Many operate at a specific wavelength due to
spectral windows on their transducers that make the unit very application
specific.

A good IR thermometer,correctly factory calibrated, should be left
alone, and will remain deadly accurate for years. If one thinks one's
reading is off the mark, think about emissivity factor. Do not ever
blame your instrument. Operator error is often (nearly always)the case.
Calibrated thermo-couples are always nice to have around to verify your
IR Thermometer reading capability.

That is, if one buys a reputable instrument to begin with.
 
A

Archimedes' Lever

Jan 1, 1970
0
I noticed that my typical Fluke IR thermometer only works at room
temperature. I took it outside last winter, and after the unit starts
to cool, forget it.

Now, if you examine the spec Fluke published, you should find a range
of operation, under which it is meant to give a calibrated reading.

The device (IR Transducer) that does the reading (likely a resistor
bolometer) is perfectly capable of reading lower, but the electronics it
feeds only got designed to work in a specific voltage window, so there
will be no read out below a certain threshold. It has to do with Fluke's
circuitry and calibrated window of operation. The transducer itself is
capable of far more, I guarantee it. Just don't point it at the Sun.
 
B

Bungalow Bill

Jan 1, 1970
0
Have I got really rubbish thermometers? I've tried measuring body temperature both in my mouth and under my arm, and it's never more than about 30C.

I never thought that I would ever get to say this to anyone and really
mean it.

STICK IT UP YER ASS! :-] Hehehehe!
 
T

The Pig Bladder from Uranus

Jan 1, 1970
0
Have I got really rubbish thermometers? I've tried measuring body
temperature both in my mouth and under my arm, and it's never more than
about 30C.
I never thought that I would ever get to say this to anyone and really
mean it.

STICK IT UP YER ASS! :-] Hehehehe!

And if next time I forgot I'd done that, and stuck it in my mouth?

Have you ever heard the term, "wash"? And a healthy ass shouldn't have
anything harmful in it - it's inside your own body, right?
 
B

Bungalow Bill

Jan 1, 1970
0
And if next time I forgot I'd done that, and stuck it in my mouth?


I think you could survive your own fecal remnant attack. Sheesh. Wash
it off already!
 
S

SoothSayer

Jan 1, 1970
0
Try feeding the exhaust pipe into the air intake in your car and see if you can drive it a fair distance.


Bannana in the tailpipe fails as well...


Bwuahahahaha!
 
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