url: http://escribe.com/health/thesilverlist/m60186.html
Re: CS>$$$ perpectives
From: Arnold Beland
Date: Fri, 13 Jun 2003 19:44:59
> 500 gallons X 8lbs X 16 = 64000 X .000020 (ppm?) = 1.28 ounces of
> silver used. I should think that that amount of missing silver
> would be noticeable. Something wrong with my thinking here? Mass
> is Mass, correct?
Hi Arnold,
You are right. Forget about interleaved electrodes, polarity
switching and outward-facing elecrodes. They just mess up the
calculations.
I get the following:
lb = 8.34 * gal
= 8.34 * 500
= 4170
oz = 16 * lb
= 16 * 4170
= 66720
For 20 ppm, the silver weighs
wt = oz * ppm
= 66720 * 20e-6
= 1.3344 oz
Now we run into problems with Troy oz vs avoirdupois. But I did find
a reference that states silver weighs 6.25 ounces per cubic inch.
cuin = wt / 6.25
= 1.3344 / 6.25
= 0.2135
There are four plates 1.5" wide with 5" wetted depth. The face area
is
area = n * width * depth
= 4 * 1.5 * 5
= 30 sq. in.
Volume is area * height. We know the volume, now let's get the
height.
ht = cuin / area
= 0.2135 / 30
= 0.00711 inch
= 7.11 mils
That is more than half the original thickness of 13 mils. It should
be easy to measure.
Here is a table of thickess loss vs ppm:
10 ppm = 3.55 mils
5 ppm = 1.775 mils
1 ppm = 0.355 mils
0.3 ppm = 0.118 mils
It should be possible to detect a .1 mil change in thickness, so the
ppm must be 0.3 ppm or less.
However, the system has an automatic shutoff when the solution
reaches the desired ppm.
I don't know how to design a comparator that would function reliably
at such low ppm levels.
Perhaps it is triggered on a noise spike, such as turning on a
light, or a static discharge from walking across a carpet. This is a
common problem with comparators, especially when they are attached
to external wires that act as an antenna.
If this is the problem, the solution could be easy or very
difficult. It depends on how the pcb is layed out, and what kind of
rfi filtering is used.
It should be possible to see if this is the problem by starting a
batch and turning on an ordinary electric drill nearby. If the
system shuts down immediately, suspect rfi getting into the
comparator.
Troubleshooting these kinds of problems is very expensive. The
people who know how to do it charge for their talent. The equipment
that is needed can be very expensive.
However, all the work I do with colloidal silver is free. I would be
happy to do it for nothing, if Trem would pay the shipping charges
and supply all needed documentation, including schematics and pcb
layout.
Best Regards,
Mike Monett
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