On 03/03/2015 09:26 PM, Reece Maxey wrote:
Give me an idea how you would want data compiled,
increment size, procedure to be followed etc and for how
long. A conductivity probe/tester that could be immersed
in the water and used during process would be nice. I
tried using my Fluke meter in series with anode in one of
my first attempts to make CS; it didn't want work for
some reason. Might have something like an AC component in
it since I was using DC adapter. Opa
I don't really know what range of reversal time is near the
critical time constant for the process, so your experience
would be the guide to what times look interesting.
Assuming the reversals are slow enough to time by eye (with
an LED indicator, from something like a couple cycles per
second to say, 10 or 20 seconds per cycle), a conductivity
check about once an hour might be good enough to compare
production times. Record test value and time.
I worry that the conductivity probe may give wrong results
if used while the cell current is flowing, or even be
damaged. You should probably turn the supply off for each test.
Of course, similar volumes of similar water would be needed
for each test. I am looking for the rate of ion production
in micro Siemens per hour increase or TDS count increase per
hour, early in the process, rather that trying to time some
specific, final value of conductivity. This is why
recording test time is important. Conductivity change,
divided by time since previous test is the important number.
I think roughly doubling the cycle time for successive tests
would get us a pretty good idea where the critical time
constant is.
i.e. 4 cycles per second, 2 cycles per second, 1 second per
cycle, 2 seconds per cycle, 4 seconds per cycle, 8 seconds
per cycle. or something like that. Connecting those points
on a curve should estimate the in between values.
I expect the production speed to almost double as the cycle
time doubles, at the fast end, until you approach the
critical time constant. Then the production rate should
flatten out, approximating the DC rate. I want to know
where the corner is, where faster cycles really hurt
production, but slower only degrades the electrodes the way
DC does.
But I am guessing. There may be surprises. I've been wrong
lots of times.
--
Regards,
John Popelish
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