HomeRoast Digest


Topic: Thermocouple and Display for Roasting Coffee (5 msgs / 93 lines)
1) From: Mark Neuhausen
I am using modified Poppery Is and want to reduce the amount of time tending
the roast.  Right now, I have to squint at the thermometer and rotate it and
would like a nice digital readout instead as the first step to automation.
What thermocouple and digital readout should I get?  Cheap is good.  And
good is good.  I must save money for the actual coffee, after all.
-Mark

2) From: George Silver
Terry,
Is the digital probe you mention below sufficiently accurate?  +/- 2% 
in the 400 degree range seems like a lot.  Or have you found a good 
way of checking and/or calibrating it?
--George
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At 10:10 PM -0500 9/18/03, Terry Stockdale wrote:
<Snip>

3) From: Spencer W. Thomas
I have one of those too.  Just recently the readout started getting 
flaky.  It looks like the thermocouple wire has been flexed too much (I 
think where it goes into the connector.)  Is this condition repairable?  
Or must I buy a new probe?
=Spencer
Terry Stockdale wrote:
<Snip>

4) From: Andrew Thomas
Mine did that too. I took the plug apart and separated the 2 wires. Then put it back together and used a bit of tape to reinforce the lead where it enters the plug. That was months ago and it has worked fine ever since. Good luck.
Andy
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I have one of those too.  Just recently the readout started getting 
flaky.  It looks like the thermocouple wire has been flexed too much (I 
think where it goes into the connector.)  Is this condition repairable?
  
Or must I buy a new probe?
=Spencer
Terry Stockdale wrote:
<Snip>
Free e-mail!  you
A service of www.WallaWallaGuide.com

5) From: dewardh
George and Terry:
<Snip>
cheaper to buy a new thermometer including the thermocouple. 
Our local full service electronics store (in Berkeley, Al Lasher's) has
replacement bead thermocouples (with the connector) for $6.95, and I've seen
them for that on the web, too (but then there's shipping . . .).  I've bought
several, and have them perminantly mounted in aluminium tube "thermowells" which
protect the bead (but not from wiggling the connector ).  They work just as
well with the Extech EV-15 dual channel datalogger, too . . . same connector . .
.
Deward


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