Re: [Distillers] Re: temp control
- Talk sense,I could not understand what you were going about.I suggest that you stick the thermometer somewhere the sun don,t shine, take a reading and go to bed,
subsonic40grain <subsonic40grain@...> wrote:I used to worry about temperature, then I realised that the
placement of the probe / thermometer makes quite a difference. So
now I place the probe / thermometer (Ok I use 2) and get full
reflux, I let it level off for about 30 minutes and take a reading.
That gives me a kind of benchmark for the rest of the run. Probably
not scientific but get this. I had ToddK63 over and another Bio (i
have a lot of letters after my name) professor geezer. They both
said my neutral was the best. Zymurgy Bob - I am nearly there...
and yours is in the post! ;-#
So, it works for me, and I am runing neutral @ 79 - 80c. If I hit
84 I get into tails, but that is just on my rig. it has taken me
about 2 years to get to know my still. Now I am happy running it.
practice is the key I reckon.
Todd - Please verify...... ;-*)
--- In Distillers@yahoogro ups.com, "Virgil & Taralee Cote"
> thank you so much for the imformation, i thought that the top of
the column should run @ about78.5C or so, so i thought if i put a
varriable resistor i could back the element down, so i could get
78.5C, everything i have read says there units run @78.5C
> I don't have a hydrometer yet to measure that high yet,but judging
by the little i get from a run i think the purity is right up there.
> When you say temp fluctuate is 79.0 to 79.2 considered fluctuating
> ----- Original Message -----
> From: Harry
> To: Distillers@yahoogro ups.com
> Sent: Saturday, September 22, 2007 4:25 AM
> Subject: [Distillers] Re: temp control
> --- In Distillers@yahoogro ups.com, "cotevirgil" <vtcote@> wrote:
> > I have a 3000w and 1000w internal elements, when i'm up to
> > of the 3000w element, and run the 1000w, but the temp at the
> of the
> > column is about 79c though the hole run, should i be tring to
> > that temp, how would i lower the temp, i'm using a
> > at the top of the column
> I don't see anything wrong. Why would you want to lower the
> temperature? Temperature at the top of the column is a direct
> result of the ratio of vapours present at that point. 79°C is
> easily good enough. Are you unhappy with the purity you're
> Are you thinking that controlling the temperature will control
> purity? (common mistake). It won't. Controlling the HEAT INPUT
> keeping it down to what the column can handle as vapour speed
> But if you're already distilling at 1000w with a 2" column of 2'
> higher, then it's already running at optimum.
> Thermocouples are no more accurate than any other form of temp
> measurement, unless you pay squillions for a scientific
> instrument. Thus 79°C is acceptable, as long as it doesn't
> fluctuate during a run. That's the benchmark figure for your
> particular setup.
> regards Harry
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