[Help firing an older Ceramichrome Autofire with Kiln Sitter]

Thank you so much! Yes the weight was dropping early. I set the sitter time to 13 hours, but it dropped very early in the firing. Thank you so much for the link! Very helpful!!! 

[Help firing an older Ceramichrome Autofire with Kiln Sitter]

This summer I purchased an older kiln at an estate sale. I’ve attached photos of the controls, and the model number. I’ve tried to fire to cone 04 a few times for a test firing, but so far the kiln sitter shuts off around 5 hours, and the self supporting cone is barely bent. 
The top dial, I’m assuming is the temp, and the second a timer. 
does anyone have any suggestions on a firing schedule? So far I’ve tried 2nd knob ON — 1st knob 4 hours at low, the switched to medium, and then the sitter shuts off after about an hour at medium. 
 

any advice would be so greatly appreciated!!!! Thank you!! 
Bridget