I fired with all the peep holes plugged to ^06 on a fast glaze firing. it took 3:56 to complete the cycle. top heat measurement according to the digital read out was 1839. It cooled over night and when I opened it this morning to check the test cones inside they varied a lot from what I could see, please see attached photo.
Going from left to right in the photo:
Top most shelf placed about 4 inches down from lid, shelf was positioned just below the peep hole at this level. There was 1 row of elements between shelf and lid.
Cone 1 - directly in front of peep hole on edge of shelf
Cone 2 - placed in very center of top shelf
Middle shelf was placed 8 inches down from the top shelf just below the level of the 2nd peep hole. There were a couple rows of elements between shelves.
Cone 3 - directly in front of peep hole on edge of shelf
Cone 4 - placed in very center of shelf
Bottom shelf was placed 4 inches down from middle shelf just below the level of the 3rd peep hole. There was at least 1 row of elements between shelves.
Cone 5 - directly in front of peep hole on edge of shelf
Cone 6 - placed in very center of shelf
Just above the floor of the kiln I placed 1/2 inch posts with a whole shelf sitting on it. I plan to leave this in the kiln permanent so am calling it the floor shelf. I unfortunately did not place any test cones on this level and I probably should have thinking about it now. I followed the directions and placed them on each shelf with a peep hole but in future will also place cones on this level as well.
It looks to me like the kiln is cooler on the top and hotter on the bottom and from what I have read this is opposite of what normally happens. Meaning usually a kiln fires hotter on the top and cooler on the bottom. Though I did read somewhere else that the temperature in a kiln can vary as much as a cone cooler on the top shelf as compared to the bottom shelf. I can only go by what I have read as I have never fired a kiln before.
So do I have a problem? If so how how do I fix this? It's a brand new kiln and this was its very first test firing with only shelves, posts and cones inside of it.