iRoast Sample Roast 2
Full City+(+) [12.5 minutes]
Roast2-AGraph1 |
Roast2-Chaff |
Roast2-ScreenChaff |
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Roast2-CoffeeFinish |
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Roast 2 Information
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Type: SM Monkey Blend Weight: 120 grams 0-load Volts: 119.5V Load Volts: 110V Ambient: 74F Humidity: 55% |
Total RoastTime: 12min. 30sec. ROAST PROFILE Stage 1: 325F, 5min. Stage 2: 390F, 7 min. Stage 3: 460F, 3 min. |
Please note that this roast was more successful (in terms of matching my roast plan) than roast 1 or roast 3 -- but my heating stage 300F-390F was way too long. The end-phase may be a bit long too. Again, the drying phase 80F-300F is much too short. Although the roast profiles are the same in roast 1, 2 and 3, I changed too many variables in roast 2 for easy validation, when compared with Roast 1.
| VALUE | Roast 1 | Roast 2 |
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WEIGHT |
150grams | 120grams |
| V(no-load) | 127V | 119.5V |
| V(load) | 118V | 110V |
| BEANS | OCEx "House" | SM Monkey Blend |
| Ambient T. | 81F | 74F |
Comparing Roast 1 and Roast 2.
Roast 1 was the last of my Orleans Coffee Exchange "House" espresso blend.The beans were smaller, lighter (less moisture content), and produced much less chaff than the SM beans. you can see in the photos that 120grams of SM beans produced more chaff (larger in both individual piece size and total amount) than 150grams of OCE. I think this fact shows that the amount of chaff may not be the major factor in causing rapid temperature rise after 8 minutes, at least in my machine, when loaded with 120grams.
Note that in the following page, Roast 3 is the same as Roast 2, but variac voltage was set higher to observe the effect of a voltage at 120grams matching an equivalent voltage to Roast 1.
Roast 3 is my quickest and hotest yet. I believe this is due primarily to increasing the voltage to the iRoast, compared to Roast 2.
Richard G
comments welcome. email
gilbert(at)iyume(dot)com
| Return to intro page | Go to Roast 3 |