I am still experimenting with environment temperature measurement on the Hottop and took some photos of the setup including the Victor 86 C multimeter during a recent roast. The environment (blue) temperature is read directly from the Victor 86c multimeter via it's USB connection and the bean temperature (red) from the Hottop display via a webcam.
The chart produced, I have removed the template curves for clarity:
A cut down copy of the log produced showing the main roast stages:
Log created at 10:17:33 02/02/2010
Use Options|show log template form to modify this template.
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Bean/Blend name:De Lujo
Profile description:
Load at BT of 120 C - power down to 70% at 196 C and down to 20% 60 secs. into FC
fan on one from 3 mins. to end of roast
Roast notes:
Cupping results:
Roast Logger Copyright © T. R. Coxon (GreenBean TMC).
Roast started at 10:23:40 02/02/2010
Elapsed time , OCR 1 , OCR/DMM2 , Event type
00:00,118,185,Beans loaded
00:05,111,180,timer
00:10,109,176,timer
00:15,107,174,timer
12:10,205,226,timer
12:12,205,226,First crack start
12:15,205,226,timer
14:15,211,226,timer
14:18,211,226,First crack end
14:20,211,226,timer
15:25,213,225,timer
15:30,213,225,timer
15:32,213,225,Second crack start
15:32,213,225,Beans ejected