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Topic: Homeroast Digest, Vol 37, Issue 5 (2 msgs / 64 lines)
1) From: sci
Mike,
That makes sense. I get it. The Amp meter gives me a relative measurement. I
have used that same method with temperature measurements in the past with
other roasters.
Everything in my house runs hot and fast at 125v. I live about 500f from a
power substation.
Thanks for reassurance on the heating elements. I try to never push anything
technological to its utter extremes. "Easy does it" is my motto. I will get
a Killowatt to measure the actual wattage being used. I know some of that
will be for the motors and fans.
Ricky,
I have been using 7A for 125-150g batches; 7.5A for 200g; and 8A for 225g. I
reach 1C in the 9-11 minute range. I did 225 g of Classic Mandheling and I
had no problem getting to 2C at 15:00 and 438BT. I have not been able to
record ET reliably just yet. When I do measure it with my 2nd TC, it is
usually a good deal higher. I need to get a dual input unit.  I have done
about 15 roasts w/out the thermal blanket, and about 10 with it. The
blanket, IMHO, aids the thermal transfer, makes the unit behave more
steadily, gives it thermal momentum. When I plot my  roast curves, they are
a pretty consistent, very similar. I'm still in the learning curve on how to
manipulate the curves. I get a nice long pause between 1C and 2C hitting 2C
in the 14 to 16 minute range. I have been doing what Tom suggested: leave
the power setting alone and using the fan to manipulate the curves.
A dumb mistake to avoid: I accidentally hit the door lever on the QM3 just
as my Classic Mandheling was entering 1C, releasing about 25% of the beans
into the cooling tray. Not good. The door got stuck open with beans, and
more poured out. I managed to get the door closed again. Determined not to
ruin the roast, I quickly  dumped the escaped beans back into the loading
chute. This incident caused a big dip in the roast curve, but the Q quickly
gained momentum and got them up to 2C.
Ivan
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2) From: ricky carter
Thanks Ivan, I think I need to add the insulation to the outside of the drum
also.
I have had the door pop open on me about a half dozen times, usually at the
beginning of the roast.  I thought i was bumping it also but this last time
realized the door may not shut completely at times, particularly doing back
to back roasts and trying to hurry things along.  I now check it every roast
to be sure it is closed properly.
that is really the only complaint I have about the quest, and it is minor.
On Sat, Feb 5, 2011 at 3:52 PM, sci  wrote:
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