RoR Measurement and Thermocouple Effects

Rate of Rise (RoR) should be interpreted as a measured signal, not only as an abstract profile shape. In one discussion, a user noted that the intended or profile RoR may be the same, while the actual measured value can depend on how the thermocouple behaves. source

Measurement System Effects

Thermocouple placement, response behavior, and signal processing can influence the measured temperature curve and therefore the displayed RoR. A reported observation was that “the actual measured” value depends on how the thermocouple works. source

Heat Application and RoR Appearance

Users also noted that applying heat lightly can make the RoR look quite different, because the temperature change over time, or dT, is not necessarily the same even when a profile target appears similar. source

Practical Implication

When comparing RoR curves, keep in mind that differences may come from both roast energy application and the measurement system itself. Comparisons are most meaningful when thermocouple setup, machine configuration, batch size, and profile context are kept consistent. source