Jennifer Boyer on thu 3 jul 97
Well, I'm having lots of fun with my little electric test kiln(what a rush
to open it up the morning after firing!), but during the first firing I was
messing around with the settings and managed to create a temp drop at about
cone 8. I fire to 10. Took a long time getting the momentum of the firing
back. My oxyprobe registered about 10 points hotter than usual when I
finally got cone 10 to bend. The pots looked overfired. Would that cone 10
have gotten damaged by the temp drop, so it bent later than usual?
I'm firing again tonight and it looks like 10 will bend at the usual point
on the oxyprobe scale.
Amazing what I can screw up even after 20 plus years of potting....
Jennifer
~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*
Jennifer Boyer
Thistle Hill Pottery
Montpelier, Vt. 05602
jboyer@plainfield.bypass.com
David Woodin Set Clayart Digest on sat 5 jul 97
I am curious as to why you use an oxyprobe in an electric kiln. If you are
using it to just read temperature, a more accurate way is to use a didgital
instrument with a type k thermocouple. The oxyprobe has an uncompensated
readout. ( have to look up temperature on a table which is only accurate for
a certain ambient temperature)
Jennifer Boyer on mon 7 jul 97
I was using the oxyprobe because I had an extra thermocouple for it(use
my main one for my gas kiln) and needed a pyrometer to measure the temp
rise in this teenie little test kiln. I'm trying to get a similar rise to
what my gas kiln does. I've had trouble with regular pyrometers getting
squirrely over cone 8, so figured I'd use my MOST accurate tool for this
job....
Jennifer, testing lots.
>----------------------------Original message----------------------------
>I am curious as to why you use an oxyprobe in an electric kiln. If you are
>using it to just read temperature, a more accurate way is to use a didgital
>instrument with a type k thermocouple. The oxyprobe has an uncompensated
>readout. ( have to look up temperature on a table which is only accurate for
>a certain ambient temperature)
~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*
Jennifer Boyer
Thistle Hill Pottery
Montpelier, Vt. 05602
jboyer@plainfield.bypass.com
| |
|
