Serpi,
25C above external is a big delta. Is the unit in a drawer or positioned in a tight spot? A small amount of air flow could drastically change the internal temperature.
We calibrate the BB60C in an environmental chamber which has high air flow via several fans. The internal temperature is typically ~10C above external in the chamber. Meaning, the highest internal temperature we are calibrating at is ~75C.
Given your current setup, you could operate to 50C external and still be within calibration. The device will continue to operate above that, although potentially outside the specified performance.
Regards,
Andrew
