Alan Lent Sr. on wed 2 oct 02
"Any one out there with a 2831g. I have tried various changes in shelf
stacking, but no matter how I change the shelves I still get about a 4 cone
difference between the top and bottom shelf. It is always much hotter on
the 2nd shelf from the top than the bottom shelf."
Seems to me you may have too much draft, air flow whatever
you want to call it, through the kiln. Perhaps you should try closing the
just a "scosh", a very little bit to slow down the flow of the flame (read
through the kiln.
In Yuma where there is NO sign of global warming. Just the opposite - 30
cooler this week than last. Unheated swimming pool down below 70.
Paul Vernier on thu 3 oct 02
I have been firing the Olympic 2831g for about 3 years now.
As was previously suggested, the damper has dramatic effect on the temperature differential in an updraft or downdraft, but the opposite.
Granted the loading and the baffle shelf are important in the Olympic.
A few months back I bought a Fluke pyrometer that support two thermocouples.
When I began using the Fluke I was finally able to see just what affect the damper had on temperature.
When the damper is closed off tight for heavy reduction the bottom of the kiln can be 100f hotter than the top.
Open the damper and you can see the top get hotter and the bottom of the kiln can actually drop in temperature.
The damper will control where the heat is directed.
If you want to learn to control the temperature differential, get a dual thermocouple pyrometer.
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