Hi Ivan,
I don't have any reference point because we never did run the units
un-switched. The electrodes are only 3/8" or so apart and are corrugated
for rigidity. I needed a way to either clean them manually or have them be
self cleaning. I didn't think users would be very handy at cleaning them
without damaging them, so, reversing current was my only option. I used
close spacing to have a high gradient in the water which would force the
process to start quickly using startup voltages around 70
volts. Everything was a tradeoff.
We are running about twice the current density on the switching unit as
compared to the un-switched one but they both seem to make the same ratio
of ionic to particulate silver. Am using about 15 times the surface area
of silver on the switched unit compared to the un-switched one. Beats me
why they have the same ratio......maybe when one is using very low current
density it just works out that way. With 4 electrodes 1.5" X 5" wetted
depth connected in parallel sets so that cathodes and anodes are always
sandwiched between 2 electrodes (except for 1 end electrode) we run 30
ma. I'm having a tough time explaining electrode configuration here...hope
you understand my meaning.
Your explanation of the sag we experience after each reversal sounds good
to me. With good water flow between electrodes it is minimized
however. We use a submergible pump to keep it all in motion so there isn't
an area of stagnant ions between electrodes that has to be turned
around. They are all in continuous motion.
Trem
At 07:35 PM 1/20/2002 +1300, you wrote:
> -----Original Message-----
> From: Trem [mailto:t...@silvergen.com]
> Hi Ivan,
>
> We had AA testing done on samples from our SG6 which does not
> have polarity
> reversal and also on our SG7 which does reverse polarity and
> found both
> units produce about 85% ionic. Apparently it makes no
> difference...at
> least in our units.
>
> What now?
>
> Trem
Well, that sort of destroys that theory, Trem.
What now?
Beats me...
BTW, do you need a longer brewing time switched vs. steady, per unit
concentration?
Ivan.
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