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Homeroasters - Home Roasting Coffee Community » THE ART OF ROASTING COFFEE » Roasting Coffee

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Probing the SR500
8675309	#1 Posted on 04/13/2019 12:02 PM
1/4 Pounder Posts: 92 Joined: August 02, 2018	I was looking at my Redi-Check meat-therm-setup and behold the probes almost fit into the top of the chaff collector. A small drill bit to open it up a bit allowed the probe to work.!!! I did some tests and found some interesting info on the Low-Med-High settings as far as temp goes. Attached are results - the graph lists 1-2-3-4-5 at the bottom those represent 30 second intervals. Bean was an El Salvador. I ran on Low for 0-150 seconds I ran on Med for 180-270 seconds I kicked to high at 300 seconds to 450 seconds. 1C started outlier at 270 seconds and stayed with me up to 330 seconds where the temp stayed at 442, dropping to 441 for a few seconds before kicking up again. 2C started at 450 second mark and I let 2C continue for 5-7 seconds before hitting cool. The cool cycle dropped the temp to 133 where I dropped them onto a cookie sheet for further cooling. 8675309 attached the following images: Edited by 8675309 on 04/14/2019 2:39 PM It's bad luck to be superstitious


8675309	#2 Posted on 04/14/2019 2:38 PM
1/4 Pounder Posts: 92 Joined: August 02, 2018	As I am recovering from an emergency appendectomy I don't have a lot I can do other than sit around and turn dials on the SR500 - so I did another run, this time a Columbian. The graph bottom line is 30 second intervals. I did notice that 1C outlier came in at 400 but 2C started at the 450 mark. Cool down stopped at 140 degrees. There was a leveling off and very slight decline in temp during 1C as I saw with the El Salvador. 8675309 attached the following image: It's bad luck to be superstitious


JackH	#3 Posted on 04/14/2019 3:25 PM
Administrator Posts: 1809 Joined: May 10, 2011	I hope you are feeling better. I am not too familiar with the SR500. The probe looks good and I think you should get good results with repeatable temperature measurements. ---Jack KKTO Roaster.


8675309	#4 Posted on 04/14/2019 9:48 PM
1/4 Pounder Posts: 92 Joined: August 02, 2018	Quote JackH wrote: I hope you are feeling better. I am not too familiar with the SR500. The probe looks good and I think you should get good results with repeatable temperature measurements. Thanks - and yea this is an exercise in discovering / monitoring temps on the SR500 - I was surprised at the 'range' in the Low-Med-High modes of the machine and I hope this helps others (and myself) in their roasting processes. It's bad luck to be superstitious


mtbizzle	#5 Posted on 05/04/2020 3:26 AM
1/4 Pounder Posts: 101 Joined: April 22, 2020	Hey, I saw you describing your setup with your SR500 elsewhere, and thought you might benefit from the MASTECH MS6514. I imagine you could eventually get one without any insane price. I believe? they are a good way to go thermocouple -> USB -> PC -> Artisan chart. So, if it works well, in theory you have better access to the data you're getting with the thermocouple. How do you like your roasts with the SR500 + thermocouple? Do you find they improved a lot with the changes? Maybe something as simple and inexpensive (relatively speaking) as the SR500 can get good roasts, with good temp curves, as long as you have the data and adjust? Roast: Kaldi wide, SR800 + projects Grind: Lab sweet, Bentwood, giota w/ MP burrs, Commandante Pull: Decent, La Pavoni, Elektra Microcasa a Leva, Faemina anno 60, Kim Express


renatoa	#6 Posted on 05/04/2020 5:36 AM
Administrator Posts: 2728 Joined: September 30, 2016	Yes, MS6514 works well with Artisan, was my first approach in the tethering roast. $64 from China, via eBay or Aliexpress.

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