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FAQ/Answer

I have programmed a segment for flash venting, which takes the kiln down to the annealing range. I open the kiln to bring the temperature down, but when I close the lid, the temperature shoots right b

If you flash cool the kiln by raising the lid, the rate for that segment should be FULL. If you have programmed a slow rate, the kiln will heat back up in an attempt to slow down the cooling rate.

Another possibility is that the elements turned back on because the temperature dropped into the next segment, which had a slower cooling rate. Or the controller was still firing the previous segment, which did not have a FULL rate.

Another point: Kilns are subjected to temperature rebound. If you opened the lid for a moment to lower the temperature, the temperature would go back up a little after you lowered the lid again. This would happen even if the kiln were turned off.



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