Ok. My new Digi Q arrived today. Recently got a new Tel-Tru 200-1000 as well.
Checked the boiling water calibration on the Tel-Tru and it was spot on. Did the same with the BGE thermo. Perfect.
Installed the Guru, set to hold 400°
Lit the lump, clipped the Guru's pit probe to the Tel-Tru, opened the small holes on the DFMT about half way.
Sat back with a beer to see what would happen.
Temps aren't even close. Opened the petals on the DFMT til fully open. TT managed to get to 400°, but the Guru said 430°!!
Removed the TT and replaced with BGE thermo. Same story.
After nearly an hour, I now show 360 on the dome gauge vs 400 Guru - which is clipped TO the dome gauge! In other words, temps are all over the place and the current 40° difference seems rather a lot! Am I doing something wrong?
If you’re afraid of butter, use cream. Julia Child