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Hot Top Bean Door Temperature Probes
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rarebear
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rarebear
Joined: 13 Dec 2009
Posts: 213
Location: Rex. Georgia USA
Expertise: I love coffee

Espresso: Fiorenzata Bricoletta
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Posted Sat Jun 30, 2012, 10:37pm
Subject: Hot Top Bean Door Temperature Probes
 

I bought a Hot Top a week or so back and wanted to add some temperature probes..
I was to cheap to buy an extra door and I had some stainless on hand so I made one and installed the probes..
Here in Georgia its been 104 + the last few days and now I'm think I should have bought one :)




Here's the Bigger Pics..
https://home.comcast.net/~wizkidz/thermo/thermo-1.jpg
https://home.comcast.net/~wizkidz/thermo/thermo-2.jpg
https://home.comcast.net/~wizkidz/thermo/thermo-3.jpg

rarebear: thermo-10.jpg
(Click for larger image)
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frcn
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frcn
Joined: 23 Dec 2001
Posts: 3,404
Location: Northern California
Expertise: Professional

Espresso: Vibiemme Domobar Double
Grinder: Mazzer Kony, Baratza...
Vac Pot: Hario, 2 Cory pots, 1 Cory...
Drip: Behmor Brazen, Bunn A10 mod...
Roaster: computer controlled Hottop,...
Posted Sun Jul 1, 2012, 3:37am
Subject: Re: Hot Top Bean Door Temperature Probes
 

Looks like a nice job.
I might suggest bending the bean probe a little further away from the back wall. It would put it a bit deeper in the bean mass and further away from the hot metal of the chamber for better readings (but just guessing since you did not show a pic of the probes installed in the roaster from inside the chamber.

 
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rarebear
Senior Member
rarebear
Joined: 13 Dec 2009
Posts: 213
Location: Rex. Georgia USA
Expertise: I love coffee

Espresso: Fiorenzata Bricoletta
Grinder: Mazzer Major
Vac Pot: Yama 8C
Roaster: Hot Top B2
Posted Mon Jul 2, 2012, 8:23am
Subject: Re: Hot Top Bean Door Temperature Probes
 

I have the probe 1/2 between spoke and wall..
Should it be a little closer to spoke?
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frcn
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frcn
Joined: 23 Dec 2001
Posts: 3,404
Location: Northern California
Expertise: Professional

Espresso: Vibiemme Domobar Double
Grinder: Mazzer Kony, Baratza...
Vac Pot: Hario, 2 Cory pots, 1 Cory...
Drip: Behmor Brazen, Bunn A10 mod...
Roaster: computer controlled Hottop,...
Posted Mon Jul 2, 2012, 9:46am
Subject: Re: Hot Top Bean Door Temperature Probes
 

The distance from the wall sounds OK. Hitting the spoke or stirring vane is one way to find out how strong your probe is. Ya.. I know from experience.
What about the depth in the bean mass. That is even more important.

But the bottom one is that if you are getting consistent readings from batch to batch, and you can use those to control the roast the way you like, the actual temperature values do not matter at all. In other words, if your display always shows first crack at 350 degrees F, and it does so every time, then it is a simple matter to predict it and make the necessary adjustments.

 
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