Hello, Ode and other experts, and amateurs like me:
Temporarily, until I am able to buy better measuring equipment, I am using a
volt meter to read the volts and a multimeter (my temporary conductivity
meter!) with 0-10 mA scale to read miliamperes in my batches. Even though
the degree of precision is very poor with these instruments, I can
appreciate readings of 0.05 mA. I carefully record the readings at precise
intervals, and feed the information into Herx's Faraday Equation. This is
how I am monitoring what happens in my brewing process.
Even though the quality of the steam-bidistilled, filtered, de-ionized water
I am using is the best available, I am sure it could be better, but it is
all I have at the present. It has perceivable slight variations as I buy
from different lots produced by the laboratory, enough to notice between a
very faint movement in the dial needle as the electrodes (Huge 250 g/8.2 oz.
999.0 silver anode, stainless steel large spoon cathode...!!) are fully
inmersed 7 cm apart in 1500 ml , in one lot of water, or a larger reading of
up to 0.3 mA, under the same conditions, including temperature, in another
lot.
I try to keep the mA at a desirable level even towards the end of the
process, with an additional control I exert by gradually increasing the
distance between electrodes, from a minimum of 3 cm to a maximum of 7 cm.
As a result, I am always getting crystal clear, strong flavour, weak Tyndall
effect, no residues, presumably small particles EIS, that show an estimate
of 14-18 ppm in the Faraday equation.
I have the feeling there is not much danger of toxicity, because apart from
trying to be careful in what I do myself, the variations in the water I
assume are not more than my body and those of my children can handle.
I am sure, with the right attitude, our nature, which is all the time
bombarded by an enormous contamination coming from air, food, readings, TV,
noises, air and mind conditioning, electromagnetic fields, vibrations from
motors and sick minds, etc., will know how to deal with them. It is
constantly transmuting elements and energy by simply flipping one electron
in or out of an atomic orbit, as sodium into potassium and viceversa, or
changing the polarity of an evil thought. If it were not by these and many
other miracles (which by the way are absolutely normal and natural), our
human species would have attained the point of extincion we are by all means
striving to reach.
As always, I welcome all comments and suggestions that you may be willing to
offer me. I have learned very much from all of you.
Thank you.
Carlos
From: Ode Coyote <[email protected]>
Reply-To: [email protected]
To: [email protected]
Subject: Re: CS>meters
Date: Sun, 12 Nov 2006 08:41:54 -0500
The Hanna PWT [Trem sells the PWT for the same as factory price plus
shipping. www.silvergen.com ] and the HM Digital COM-100 [
www.silverpuppy.com , about $15 less than factory and free shipping] are
the leaders.
They are both very good conductivity meters. I have several of each and
they're all pretty much in agreement with each other...very close.
The HM Digital TDS3 is better than most of the Hanna TDS meters, but TDS
meters in general are only ballpark meters.
ALL PPM/TDS meters sorta suck for this purpose, but aren't "completely"
useless.
If any two identical TDS meters read within 2 PPM of each other in the
same 10 PPM sample, and a 15 PPM sample, that would be an accident.
Different TDS meter readings in different samples is no basis at all for
a disagreement over the telephone. [Arguing? Forget it. ]
A good source for TDS meters [such as they are] is www.sunstoneherbals.com
[James Allison]
Check ebay as well.
ode
Does this conductivity meter have a name? or a brand?
I have seen the Hanna TDS meters online. I want to put
it on my Christmas list.
Kathryn
_______________________________________________________
You can't really use time alone to predict PPM.
Only slightly purer water can make a really big
difference to get to
the same stopping point
Best bet is to get a conductivity meter
Next best , a PPM/TDS meter
Or even just an volt meter [multi meter ]
"Some" way to tell where you are in the process.
ode
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