Not a member yet?
Click here to register.

Forgotten your password?
Request a new one here.

Shoutbox

You must login to post a message.

renatoa

03/23/2023 10:31 AM

Welcome, bob22

allenb

03/22/2023 8:52 AM

Thanks skpacman! all help with our site is much appreciated!

skpacman

03/20/2023 8:57 PM

Added some code to combat against bots. If anyone has issues with it, let me know. ❤

renatoa

03/19/2023 4:55 AM

frankvanhaarlem, fenix and Andyleighmyers

renatoa

03/16/2023 2:51 AM

@sandpiper,

Shoutbox Archive

Forum Threads

Newest Threads

What is next after S...
Roast Color Nerdy Stuff
Fluid Bed Roaster Ca...
CafeMasy SCR-300 Roast
Heating elements

Hottest Threads

Roast Color Nerdy...	[57]
Espresso maker un...	[30]
CafeMasy SCR-300 ...	[21]
2 series heat gun...	[21]

In Memory Of Ginny

Donations

Latest Donations
dmccallum - 10.00
JackH - 25.00
snwcmpr - 10.00
Anonymous - 2.00
Anonymous - 5.00

Users Online

Guests Online: 3

Members Online: 0

Total Members: 7,830
Newest Member: bob22

Oh no! Where's the JavaScript?
Your Web browser does not have JavaScript enabled or does not support JavaScript. Please enable JavaScript on your Web browser to properly view this Web site,
or upgrade to a Web browser that does support JavaScript; Firefox, Safari, Opera, Chrome or a version of Internet Explorer newer then version 6.

View Thread

Homeroasters - Home Roasting Coffee Community » ALL ABOUT ROASTERS » Fresh Roast 8 and NEW SR 500

Who is here? 1 guest(s)

Thermocouple mod for FreshRoast SR-500
phunge	#1 Posted on 01/25/2011 6:50 PM
Newbie Posts: 7 Joined: January 19, 2011	I wanted to share my thermocouple mod for my FreshRoast SR-500. I've read of people using fiberglass insulated TCs, but being a bit paranoid about food safety I decided to go for a stainless-steel sheathed probe from Omega. Why I'm paranoid: the documentation on Omega's fiberglass TCs (http://www.omega...._guide.pdf) mentions a binder coating which "improves moisture and abrasion resistance but is destroyed above 400deg F", I don't want stuff like that near my coffee. The fiberglass probe I got with my cheap TC reader didn't have any documentation. I found the 12" probe to work really well, I bent it so that it'd snake through the chaff collector down into the roasting chamber. It's secured to the chaff collector with a little aluminum foil. The hole through the chaff collector was filed with a woodworking rasp (I've heard the FreshRoast's plastic can be brittle so I didn't want to drill). If I had to do it again, I might try a larger diameter probe (1/8" instead of 1/16"). The 1/16" was really easy to work with though, and the movement of the beans doesn't seem to disturb it. Feedback welcome! It was a fun little project and works great so far. Part numbers: Quote Omega #KTSS-116U-12 1/16" diameter, 12" length 304 stainless steel type K probe with lead Omega #SMPW-K-M male mini connector, type K phunge attached the following image:


phunge	#2 Posted on 01/25/2011 6:51 PM
Newbie Posts: 7 Joined: January 19, 2011	Mounted in chaff collector. phunge attached the following image:


phunge	#3 Posted on 01/25/2011 6:51 PM
Newbie Posts: 7 Joined: January 19, 2011	Probe position phunge attached the following image:


JETROASTER	#4 Posted on 01/25/2011 6:58 PM
Administrator Posts: 1780 Joined: March 06, 2010	I don't have this roaster, but that's a tidy little posting. Thanks for sharing! -Scott


JimG	#5 Posted on 01/25/2011 7:46 PM
1 1/2 Pounder Posts: 834 Joined: October 23, 2008	Nice approach with the 1/16" sheathed probe! Jim
	Web

seedlings	#6 Posted on 01/25/2011 8:52 PM
1 1/2 Pounder Posts: 4226 Joined: June 27, 2007	I get really excited whenever I see a 'new to me' item. Great probe and install! CHAD Roaster: CoffeeAir II 2# DIY air roaster Grinder: Vintage Grindmaster 500 Brewers: Vintage Cory DCU DCL, Aeropress, Press, Osaka Titanium pourover


dshepard	#7 Posted on 01/26/2011 3:35 PM
Newbie Posts: 2 Joined: December 29, 2010	Looks good! I am using the thermocouple that came with the meter Sweet Maria sells. If it fails this looks like the way to go.


phunge	#8 Posted on 01/27/2011 8:05 PM
Newbie Posts: 7 Joined: January 19, 2011	Thanks everybody! @dshepard I'm using that same thermocouple meter! It's $17 at http://www.web-tr...wkpro.html, found thanks to a suggestion on this forum. Does anyone have any suggestions for better ways to affix the probe to the plastic chaff collector? I'm using aluminum foil which works well and is easy to modify. But I was wondering if this might cause galvanic corrosion (http://en.wikiped..._corrosion) due to the contact of stainless steel & aluminum -- I'll definitely keep a lookout for it. I can't think of anything else that'd withstand the heat.


JETROASTER	#9 Posted on 01/27/2011 8:49 PM
Administrator Posts: 1780 Joined: March 06, 2010	Try some stainless safety wire. (Aviation supply) http://www.skygee...in-co.html Have some fun and order the pliars too! -Scott JETROASTER attached the following image: Edited by JETROASTER on 01/29/2011 8:34 AM


phunge	#10 Posted on 01/29/2011 3:15 PM
Newbie Posts: 7 Joined: January 19, 2011	Sweet, that's exactly what I need. I'll give that a try, thanks!


dshepard	#11 Posted on 03/03/2011 7:15 AM
Newbie Posts: 2 Joined: December 29, 2010	Quote phunge wrote: Thanks everybody! @dshepard I'm using that same thermocouple meter! It's $17 at http://www.web-tr...wkpro.html, found thanks to a suggestion on this forum. Does anyone have any suggestions for better ways to affix the probe to the plastic chaff collector? I'm using aluminum foil which works well and is easy to modify. But I was wondering if this might cause galvanic corrosion (http://en.wikiped..._corrosion) due to the contact of stainless steel & aluminum -- I'll definitely keep a lookout for it. I can't think of anything else that'd withstand the heat. Well my original sensor failed so I purchased the above recommended thermocouple and took your advice and bought the 1/8" probe. Instead of bending the probe like you did I went ahead and drilled a 1/8" hole in the top of the roaster and just push it straight down. I use a clothes pin to hold it in place (adjustable mod!! :) ). When I first started using it the temperatures seemed low, so I double checked it by putting the probe in boiling water and it read exactly 212 degrees, right on. That meant that either I am using a different position in the roasting chamber or the previous sensor read high. It was hard to place the original sensor anyway as it was just a flexible piece of wire with the thermocouple at the very end. I like this rigid probe much better than the flexible sensor that came with the meter. Ironically I paid much more for the probe than I did for the meter and sensor combined originally.


NickelCreek	#12 Posted on 05/14/2011 8:55 PM
Newbie Posts: 3 Joined: April 08, 2011	Okay I'm confused (happens quite often actually) I have an SR500 Freshroast and am new to this roasting thing. Am I to understand that you first used a flexible digital sensor which burnt out and then switched to a rigid sensor ? Do you have a link as to where I might purchase one? Thanks[mail][/mail]


allenb	#13 Posted on 05/15/2011 11:01 AM
Administrator Posts: 3650 Joined: February 23, 2010	Quote NickelCreek wrote: Okay I'm confused (happens quite often actually) I have an SR500 Freshroast and am new to this roasting thing. Am I to understand that you first used a flexible digital sensor which burnt out and then switched to a rigid sensor ? Do you have a link as to where I might purchase one? Thanks[mail][/mail] Not sure about the flexible thermocouple sensor failing but here's a link to Omega and the sheathed sensor mentioned at the top. http://www.omega..../JTIN.html I'm guessing the 1/16" dia sheath will respond a little faster than the 1/8" due to less thermal mass. Allen Edited by allenb on 05/15/2011 11:05 AM 1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana

Jump to Forum:

Similar Threads

Thread	Forum	Replies	Last Post
Looking for roasting chamber for old freshroast FB-01	MASTER LIST of PARTS and SUPPLIES	1	04/15/2022 4:16 PM
Freshroast 800	Fresh Roast 8 and NEW SR 500	2	09/16/2021 3:45 AM
aArtisanQ_PID thermocouple jumps when active PID channel	Dataloggers/Controllers/Rate of Rise Meters	16	06/10/2021 9:57 AM
Thermocouple	Drum Roasters	4	07/24/2019 1:17 PM
thermocouple issue	Building a Coffee Roaster	6	03/24/2019 1:56 PM