On Wed, Sep 08, 2004 at 03:19:47PM +0200, [EMAIL PROTECTED] wrote:
> Der har været en tråd om kalibrering af thermometre.
My fault, as usual :-)
> Hvad angår kalibrering ved mellemtemp er det ikke en mulighed at
> blande 100C og 0C og tro man rammer 50C. Hæld 100C vand op, og følg
> tempfaldet, fra det øjeblik man slukker for varmen. Derimod koger ren
> sprit ved 78C, og Acetone noget lavere. (Brug ikke gasblus :-O )
Yes, I came to think of this after I sent my mail.
> Et digitalt thermometer er ikke mere nøjagtigt end et sprittermometer.
> Bevis, se på de 10 -15 stykker der hænger i en butik, de viser aldrig
> det samme, selvom de hænger ved siden af hinanden.
I believe both digital and analog meters are available in reatly varying
qualities. The best of any kind should be good enough to calibrate
against, and merely "good" ones should be quite sufficient for home
brewing.
Your comment reminded me of an old method for calibrating meters: Mix a
bowl of water at some suitable temperature, and stick those 10-15 meters
in it. The temperature is likely to be near the average of their
displays, and those showing far out values are likely to be off... This
can be repeated at any temperature you desire, and you can even draw a
curve for the deviation of each meter (against the average).
Lot of work, and requires a good handfull of meters. Educational to do
once, but of no practical value :-)
Much better is to stick to your own trusty meter, and take all numbers
with a grain of salt. See how your mashes behave, and learn what are the
ideal temperatures - by your meter - in your setup - and with your
measuring procedures.
If I just stick the meter in the mash, I get one temperature and can
believe in it. If I always stick the meter in the same place, I can
learn to predict my mashes... If I stick the meter in six different
locations (as I usually do), I get six different temperatures, often off
by over 5 degrees. Then I take comfort in my old observation that
it will be beer anyway
Heikki
--
Heikki Levanto heikki at indexdata dot dk "In Murphy We Turst"
