[Homeroast] Puzzled by Quest

miKe mcKoffee mcKona at comcast.net
Sun Mar 13 16:14:30 CDT 2011


Josh was spot on. If you're BT is reading ~300f start of 1st you've got a
temp measurement equipment problem no if ands or buts. The Quest isn't the
issue.

Slave to the Bean  miKe mcKoffee
www.CompassCoffeeRoasting.com
URL to Rosto mods, FrankenFormer, some recipes etc:
http://www.mckoffee.com/

Ultimately the quest for Koffee Nirvana is a solitary path. To know I must
first not know. And in knowing know I know not. Each Personal enlightenment
found exploring the many divergent foot steps of Those who have gone before.

Sweet Maria's List - Searchable Archives
http://themeyers.org/HomeRoast/ 
 

> -----Original Message-----
> From: homeroast-bounces at lists.sweetmariascoffee.com 
> [mailto:homeroast-bounces at lists.sweetmariascoffee.com] On 
> Behalf Of Edward Bourgeois
> Sent: Sunday, March 13, 2011 1:32 PM
> To: A list to discuss home coffee roasting. There are rules 
> for this list,available at 
> http://www.sweetmarias.com/maillistinfo.html
> Subject: Re: [Homeroast] Puzzled by Quest
> 
> If you have  a Kill-A-Watt meter you can set it on watts and see
> what's being drawn
> 
> On Sun, Mar 13, 2011 at 4:05 PM, ricky carter 
> <rickylc99 at gmail.com> wrote:
> > pop the original dial gauge back in and see if it confirms temps.
> >
> >
> >
> > On Sun, Mar 13, 2011 at 3:16 PM, Josh Schwartz 
> <veganjosh at gmail.com> wrote:
> >
> >> I think it must be that your temperature measurement is 
> off somehow --- as
> >> far as I understand, it's physically impossible that your coffee is
> >> cracking
> >> at anything near 290.
> >>
> >> On Sun, Mar 13, 2011 at 2:54 PM, Robert Bedwell 
> <rlb at triad.rr.com> wrote:
> >>
> >> > I have had my Quest for about three months and have done 
> about 30 roasts
> >> on
> >> > it.  It has worked like a charm until the last three 
> sessions and I have
> >> no
> >> > clue what is going on.
> >> >
> >> > I have Eric's thermocouple installed in two places and 
> attached to an
> >> Omega
> >> > 806.  Plans are to connect it to my Mac for data logging 
> after I become
> >> > consistent with using it.
> >> >
> >> > The first indication of a problem was when it took so 
> long to preheat
> >> with
> >> > the amps set at 10 and the fan at 4.5.  The ambient 
> temperature was
> >> around
> >> > 55F in the garage so I assumed
> >> > it was due the cooler temp.  Incidentally my Quest has 
> an insulation
> >> > blanket installed over the drum.   The last three 
> sessions have required
> >> > around 45 minutes to reach 400F which is the temp
> >> > that I use to load the beans.  Prior to these roasts it 
> has taken no more
> >> > than 15-20 minutes.
> >> >
> >> > Today I roasted Quatemala Zumay Santa Elena del 
> Jumay......thinking it
> >> was
> >> > the Ethiopian Sidama Bonka that was the source of the 
> problem in the
> >> > previous 5 roasts.   However the Quatemala mirrored
> >> > the Bonko roasts.....only faster.
> >> >
> >> >
> >> > After loading the beans at 400F the temperature drops to 
> around 210 and a
> >> > minute later is back up to 220 with a environmental (ET) 
> temp of around
> >> 580.
> >> >   With the AMP set at 8.5 and the Fan at 4.5 it is 
> taking 9.5 minutes to
> >> > reach 300F.  Unfortunately, and this is where I am 
> stumped, the first
> >> sign
> >> > of first crack is at around 290 (not 390) and first 
> crack is over by 11.5
> >> > minutes at 320F.  The low point of ET is 534 and the high is 583.
> >> >
> >> > The above has occurred for the last five batches I have 
> roasted.   I have
> >> > checked the temperature recordings of the Omega to my 
> Fluke using the
> >> > thermocouples use on the Quest and compared them to temp readings
> >> > I am getting on the Fluke.  They all read within a 
> degree of each other.
> >> >  Both the Fluke and the Omega are set for K type 
> thermocouples and there
> >> is
> >> > not an offset on either one.  Both are set for 
> fahrenheit recording.
> >> >
> >> > So, to say that I am puzzled is an understatement.
> >> >
> >> > I removed the drum about 15-20 roasts ago and cleaned it 
> but it there was
> >> > hardly anything that came off.  I have cleaned the 
> thermocouples to make
> >> > sure they weren't affecting the temps.
> >> >
> >> > To sum up;
> >> >
> >> > Last five roasts have required at least 45 minutes to 
> heat up to the 400F
> >> > bean load temperature with amps set at 10 and fan at 4.5
> >> > Taking 9-1/2  minutes to hit 300F and 1C  has already 
> started at around
> >> > 290F
> >> > !C is over at around 11-3/4 minutes at 325F
> >> > Both probes used in the Quest have been checked with the 
> FLuke I have and
> >> > are very close to the same readings
> >> > Probes have been cleaned
> >> >
> >> > _______________________________________________
> >> > Homeroast mailing list
> >> > Homeroast at lists.sweetmariascoffee.com
> >> >
> >> >
> >> 
> http://lists.sweetmariascoffee.com/mailman/listinfo/homeroast_
> lists.sweetmariascoffee.com
> >> > Homeroast community pictures -upload yours!) :
> >> > http://www.sweetmariascoffee.com/gallery/main.php?g2_itemId=7820
> >> >
> >> _______________________________________________
> >> Homeroast mailing list
> >> Homeroast at lists.sweetmariascoffee.com
> >>
> >> 
> http://lists.sweetmariascoffee.com/mailman/listinfo/homeroast_
> lists.sweetmariascoffee.com
> >> Homeroast community pictures -upload yours!) :
> >> http://www.sweetmariascoffee.com/gallery/main.php?g2_itemId=7820
> >>
> > _______________________________________________
> > Homeroast mailing list
> > Homeroast at lists.sweetmariascoffee.com
> > 
> http://lists.sweetmariascoffee.com/mailman/listinfo/homeroast_
> lists.sweetmariascoffee.com
> > Homeroast community pictures -upload yours!) : 
> http://www.sweetmariascoffee.com/gallery/main.php?g2_itemId=7820
> >
> 
> 
> 
> -- 
> Ed Bourgeois aka farmroast
> Amherst MA.
> http://coffee-roasting.blogspot.com/
> 
> _______________________________________________
> Homeroast mailing list
> Homeroast at lists.sweetmariascoffee.com
> http://lists.sweetmariascoffee.com/mailman/listinfo/homeroast_
> lists.sweetmariascoffee.com
> Homeroast community pictures -upload yours!) : 
> http://www.sweetmariascoffee.com/gallery/main.php?g2_itemId=7820
> 




More information about the Homeroast mailing list