----- Original Message -----
From: <[email protected]>
Pete
See my recent post to Tom attached.
It is very hard to judge ppm by colour. Yes there is a correlation in
batches from the same equipment ... darker is more concentrated... but
be aware that you can have no colour (water clear) at 20 ppm or deep
gold or brown at 8 ppm. The lighter the colour, the smaller the
particles for a given concentration. The higher the current the more
likely it is to produce larger particle sizes. I produce clear
solutions using the attached methods.
Happy Hunting - Ivan
> >Well thats all right then :-)
> >But 3mA is 3mA, did it take longer to reach with the lamp in the
line.
> >I take it that if you set the max current with electrodes shorted,
> >then they never actually reached that in generation?
> >I use 13K5 of resistance between the electrodes to set max current
> >(0.75mA), this relates to about 10PPM in my small systems with the
> >water I use.
> >
> >Cheers - Ivan
> >
> >Ivan,
> yes you're quite right -the process never quite reaches the
3mA,actually
> seems to peak at about 2.55mA.I think my next run will be with the
lamp
> setup,and stop at 3hrs to compare with the non-lamp setup;see if I
get the
> same colour.
> Thanks for telling me your setup procedure and ppm range;good for a
> reference ballpark.i'm playing around with this setup,trying to
optimize it
> for simple circuit and repeatable results...does your arrangement
take a
> long time to run?
> Actually,I have a previous design which always produces deep and
clear
> amber/gold
> colour cs from a 12v source.It utilizes a kHz square wave to switch
a
> darlington for the electrode/meter/filamentbulb.I stop this process
at about
> 8mA(on the meter-calibrated for 0 to 10mA).Usually takes about the
same;2 to
> 3 hrs.Perhaps the switching helps-maybe by an ultrasonic action..I
don't
> know....
> Any guesses as to this ppm?(Soon I think I'll invest in some lab
testing)
> Anyway thanks for your contributory remarks
> petemc
> >
> >
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>
>
>
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--- Begin Message ---
The black is caused (in my experience) from excessive current. Also, 36
volts is on the high side. Try putting a 10kOhm series resistor with the 36
volts. With a high impedance voltmeter across the electrodes, you should see
the voltage fall to 8-10 volts very soon. My constant current generator
starts with an open circuit voltage of 30 volts, quickly falls to 8-10
volts, and finishes at 3-4 volts. At 10 MAmp, it takes only a few hours to
make a good batch. 2 mA takes 10-12 hours. TomP
> -----Original Message-----
> From: Ivan Anderson [mailto:[email protected]]
> Sent: Thursday, June 03, 1999 2:52 AM
> To: [email protected]
> Subject: Re: CS>yuck-o
>
>
> ----- Original Message -----
> From: <[email protected]>
>
> > my first batch of cs is looking more blackish than yellow. i'm using
> 36v
> > dc.
> > should i maybe try 27v dc instead?
> > i'm wipng the 'trodes every few minutes and black stuff is falling
> in
> > clouds.
> > help?
> > Dennis
>
> Sounds like bad water. How long before things go black?
>
> Ivan
>
>
>
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--- End Message ---
