Flameboss Calibration

[Jeff_Ver]

Did anyone have an issue with the Flameboss temperature controller showing absolutely wrong numbers? I did not take a picture, unfortunately, but the funny thing is that data logging shows that everything is fine! Here is the graph of the last time I used it.(https://myflameboss.com/en/cooks/308878)
I use a simple smoker thermometer now. But it would be nice to fix my old flameboss. Is that possible to calibrate this thing somehow?

 

[Jeff_Ver]

The thing is that at that time I saw +20-25 degrees to what you can see on the picture.