Thread subject: Homeroasters - Home Roasting Coffee Community :: Anyone put a data logger on the Gene?

Posted by hazbean on 02/26/2013 6:43 AM
#17

Well done Steve, that's quite an achievement!

I see that you have done it without drilling any holes in the outer casing -- you have used a "bead" type TC at the end of a wire, which is quite flexible. The one that I used was a fairly long sheathed probe that needed to be removable as I was using it another roaster as well.

857 is pretty warm but your probe is pretty close to the heater (I did a one-off measurement of 320C/610F just inside the roasting chamber, which would be consistent with that).

Have you noticed much difference between the readout and your exit TC? I was getting about 35F difference, but it was consistent across the range of roasting temperatures.

I see also that there has been a recent firmware revision (I think mine, late 2007, is version 6, yours is version 7).

This is getting me tempted to try a probe at the heater end. I resisted before due to being unsure of the heat sealant but yours seems to be working fine ...

I was running mine with a dimmer control on the heater, and setting it using a power meter (1200W max, 800W as a medium setting, and about 300W to get a drying phase with a lower MET). Using the TC at the heater end would be invaluable in this context as it would be possible to adjust the max incoming temp (MET) directly. Interesting.