ROR graph turning at different temperatures

Roasting on the Bullet R1
1

I have two profiles for the same bean, with the same charge and power, same ROR, pretty much the same roast. That said, one shows it turning at 110 whereas the other shows it turning at 250:

Any ideas why this is? We considered Fahrenheit vs. Celsius but the math doesn’t prove it…

2

We figured it out. It is the derivative scale on the right that makes the difference. One RoR got high enough to trigger the scale to go from 0 to to 40 instead of 20.

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