Edouard Bastarache Inc. on sat 3 apr 04
Hello all,
an interesting statement by a ceramic engineer
"The majority of conventional methods are limited; for example the =
thermocouples generally used in the ceramic industry do not measure =
evenly the temperature of the product itself, but its environment. They =
are limited to the measurement of the heat transferred by radiation and =
do not take into account the heat transferred by conduction via the =
stacking furniture."
Hence the usefulness of using temperature rings.
G. GEIRNAERT , Ph.D. in ceramic engineering.
http://www.udceram.com/pageANN.htm
Later,
"Ils sont fous ces quebecois"
Edouard Bastarache
Irreductible Quebecois
Indomitable Quebeker
Sorel-Tracy
Quebec
edouardb@sorel-tracy.qc.ca
http://sorel-tracy.qc.ca/~edouardb/
http://perso.wanadoo.fr/smart2000/index.htm
http://www.digitalfire.com/education/toxicity/
Ivor and Olive Lewis on mon 5 apr 04
Dear Edouard,
To measure the temperature of an object with a thermocouple the actual
junction of the thermocouple has to be in contact with the object, if
possible buried within it.
Since most of the instruments devised for us, be they pyrometers or
Oxy-probes, have their Bi-metal junctions shielded by some form of
ceramic tube, then the read out from the meter gives only an
indication of the progress of heating or cooling and never an absolute
temperature reading.
As I said in a reply about the effects of salt, Draw Rings tell much
more.
Nor should we forget the Laws of Thermodynamics. Heat energy, whatever
its form, always moves to from High to Low temperature. Convection,
radiation and conduction all assist in that process.
Best regards,
Ivor Lewis. Redhill, South Australia
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