Re: [APD] Milwaukee controller and testing of CO2

["S. Hieber" <shieber at yahoo_com>]

If you have good water circulation, it won't matter a whole
lot. Right in front of the outlet where the CO2 enters the
water is probably not the best place.

I suggest you try in a few diff locations and see what
diffs you get -- the diffs will probably be marginal. Do
this with the tank LIghts off and then with them on, which
is a good way to check whether the fluorescent lights and
ballasts are affecting the meter readings. If they are,
rely on measurements made with the lights off.

Good luck, good fun,
sh

--- Adam Aronson <adam at aronson_net> wrote:

> Mariano,
> 
> You bring up a point I never considered... What is the
> best placement for
> the probe? Mine is on the opposite side of the tank from
> my reactor.
> 
> Adam 
> 
> > -----Original Message-----
> > From: aquatic-plants-bounces at actwin_com 
> > [mailto:aquatic-plants-bounces at actwin_com] On Behalf Of
> 
> > Mariano F. Bonfante
> > Sent: Wednesday, September 28, 2005 12:43 PM
> > To: aquatic-plants at actwin_com
> > Subject: Re: [APD] Milwaukee controller and testing of
> CO2
> > 
> > After 10 years of no CO2 controller life, I finally
> acquire 
> > mine past July. 
> > Since then, life's easier. To know what's up with PH
> level I 
> > just take a glance to the MS 122 display.
> > 
> > I can look for an industrial PH controller with a
> greater 
> > precision, but I think is a matter of solving a problem
> with 
> > the minimum resources.
> > 
> > The hysteresis of my system round 0.1.  If values are 
> > changing more radically there's an other issue, such as
> too 
> > much gas getting to tank, without the sufficient time
> to 
> > equalize the average value, or the probe is to far from
> the 
> > reactor/difusser. This type of controllers (on/off)
> enhanced 
> > they hysteresis when the error signal is getting
> earlier to 
> > the decision circuit. This is done by slowing down the 
> > process or by getting actual values asap.
> > 
> > Mariano
> 
> 
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> 


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