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Topic: Behmor voltage, watts and amps, Oh my! (4 msgs / 97 lines)
1) From: John Mac
With all this talk of  Behmor power and voltage I couldn't help wondering
about amps in relation to all this.I decided to hook up my amp probe and
voltage meter to see what was going on while I was roasting.
I took pictures of my set up and posted them herehttp://www.homeroasting.com/gallery/main.php?g2_itemId195I just did a batch of PNG Kimmel PB using the 1 pound setting  P2 at 18:00
minutes and stopped manually at 2:30 or 15:30 minutes of total roast time.
1st crack at 13:22 and no sign of second crack.
I monitored the whole process noting amps/volts at one minute intervals and
when changes occured. The results are very interesting (like how power is
still on through the first part of the cooling cycle) and I have not had any
time to input the results into the computer and make some graphs. As I am
not an Electrical Engineer so I can't go therory crazy but I do understand
the basic relationship of  Watts = Amps X Volts . Using this relationship I
can calculate out any one of the variables if I know two of the others. With
the Volt meter and amp probe readings I can calculate the wattage. I now
have a way of checking on what the machine is doing in terms of watts
applied to the beans and at what time intervals. And these numbers can be
converted into terms of percentage of power( Behmor is rated at 1630
Watts) to verify what the profiles are actually doing.
I've got more work to do and I want to go grind up a few cups worth of the
PNG I just roasted and see how I did.
More to follow.
Regards,
John
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2) From: Allon Stern
On May 20, 2008, at 5:55 PM, John Mac wrote:
<Snip>
I would imagine that's the power for the smoke scrubber.
-
allon
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3) From: raymanowen
I think I was seeing Pmax = 1388w and another at 1108w.
Power in a resistive load is not rocket science at all. Solving  P = i X =
e ,
i = e/r or P = eČ/r, or P = iČr.
As the voltage (e) changes, the power varies exponentially [change voltage a
little, power changes a lot]. Current flow is a direct response to the
voltage applied in a resistive circuit.
Iechyd da, Mabuhay -RayO, aka Opa!
On Tue, May 20, 2008 at 3:55 PM, John Mac  wrote:
<Snip>
nd
<Snip>
ip I
<Snip>
ee.com
<Snip>
-- =
"When the theme hits the bass, I dance the Jig!" - -Virgil Fox at the Mighty
Wichita (ex- NYC Paramount) WurliTzer- 1976
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4) From: Alchemist John
No mystery here, depending on how much power you are talking 
about.  The after burner is on around 2 minutes into the cooling 
cycle to continue with smoke suppression.  Plus there is a draw fan, 
cooling fan and motor.  700-800 watts would not surprise me.
At 00:04 5/22/2008, you wrote:
<Snip>
John Nanci
AlChemist at large
Zen Roasting , Blending & Espresso pulling by Gestalthttp://www.chocolatealchemy.com/Homeroast mailing list
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