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Topic: T&M's digital thermometer: that blue 'plastic' at (4 msgs / 118 lines)
1) From: raymanowen
I have the answer to the blue plastic sleeve- thanks for reminding me- It's
there to protect the measuring tip so it doesn't get too hot. I have used
type K thermocouples at 2100 F.
It never occurred to me to protect the junction from the heat I wanted to
measure... Imagine that.
Cheers, Mabuhay and Magandang Hapon -RayO, aka Opa!
There's help for your addiction- Ask your Cupper what he prescribes. Jingle
Bells!
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2) From: Dean
yer losin it Ray
it is only to keep the woven fiberglass covering from unraveling.
you can skive it off pretty easily and safely to help install it or keep =
from melting it in the roasting chamber.
The Glass has help up in my 2 Rostos for at least a couple of years =
now.  Somebody in the past caused a related discussion with the concern =
raised about shredded Glass fiber shedding in the coffee--it's not much =
of a problem, and not soluble using most coffee prep methods, so I =
choose not to worry about it.
Enjoying my bourbon(s) and being curmudgeonly and troll-like in the weeds
Dean
see yesterdays post re the bourbon(s) reference.  Better the second day.
raymanowen wrote:
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3) From: Dennis
this list uses the word _curmudgeon_ more than any other place I've ever =
seen....you would think that with all the good coffee we drink you would =
never hear it around here....LOL
Dennis
Dean wrote:
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4) From: raymanowen
OK,
When I received the digital thermometer about May '06, the thermocouple had
the blue plastic sleeve at the measuring junction end. After a couple of
HG/BM roasts, I noticed the sleeve was wrinkling up and trying to go away.
I helped it out with an Exacto knife slid under the sleeve, with the sharp
edge turned out to prevent nicking the thermocouple wire or shredding the
fiberglass insulation. That was then; this is now. I've used it for
everything from roasting to the TV brewing basket brew temperature to
component temperatures in electrical troubleshooting. Don't need no stinking
sleeve.
One probe has a flat Cr/Al ribbon junction I had Omega make with Mylar
insulation that works with the portafilter handle. I lay it across the top
and then pack all the coffee grounds on top of it with the junction line
centered in the bottom of the filter basket-
Or, pack 5g in the filter, the t/c ribbon, then the rest of the grounds.
Except for the $45 price tag, I could set it up with the ribbons at
different levels and locations, to get a temperature profile in the puck.
Multi channel, type K input strip chart recorders are so 20th century,
they're cheap now.
There are computer interfaces that can do the same thing with mixed mode
inputs, like type K t/c, and catenary pressure pickups, etc. Maybe resurrect
the old co. as a NP- Coffee pot research application (CRAP) Institute.
Cheers, Mabuhay and Magandang Gabi -RayO, aka Opa!
Got Grinder?
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