Adjust the DTR
DTR (Development Time Ratio) is an indicator that shows the ratio of the time from the start of First Crack to the end of roasting to the total roasting time.
By adjusting the DTR, you can control the roast level from light to dark.
DTR Guidelines
The following DTR values are general guidelines:
- Light Roast: 15-18%
- Medium Roast: 18-22%
- Dark Roast: 22% or more
*The optimal value varies depending on the type of beans and personal preference. Please consider these as reference values only.
How to Check DTR with Kaffelogic
When you record the First Crack during roasting, the display screen will switch and the current DTR will be shown in real time.
By looking at this value, you can determine whether to aim for a light, medium, or dark roast.
Ending the Roast Early
If you wish to end the roast earlier than planned, perform the following operations:
- Press the "▶" button
- Then press the "－" button
Performing these operations will end the roast at that point.
Continuing the Roast Further
Many profiles have a DTR pre-set. For example, if the DTR is set to around 15-18%, the roast will automatically end when that value is reached.
However, you may sometimes feel the need to continue roasting a little longer after checking the actual color and aroma of the beans.
In such cases, press the "＋" button.
This extends the roast completion time, allowing you to manually adjust the roast level while checking the condition of the beans.
Utilizing for Profile Creation
After the roast is complete, you can check the time First Crack started and the final DTR from the log screen.
By recording the roasting results that achieved your preferred taste, you can utilize this information for creating and adjusting profiles in the future.
DTR is an important indicator for improving the repeatability of roasting. Please record your DTR values and find your ideal roast.
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