On 10/1/2010 9:16 PM, Neville Munn wrote:
OK.
Not that I'm overly concerned with meter readings particularly but
here are some figures if they are of any value.
With some of these one could certainly get 0, since they lack the
resolution to measure less than 1. For water which is 0.4 of what they
are measuring they would measure:
..
Com ec/tds/temp...resolution ec 0-99: .1uS, 100-999: 1uS
#I don't use the tds function.
0.4
Com tds3...range 0-9990ppm (mg/L)
0
Hanna tds1...range 0-999ppm (mg/L), resolution 1ppm
0.
That is why it is so important to know what the resolution is when water
is highly non conductive. I do my measurement with a meter that has a
resolution of .1 uS, and thus have never seen 0. If I were to use one
of the other meters I would see 0 all the time, but they would not
really be 0, just lower than the resolution of the instrument.
Marshall
I haven't written down the accuracy % for each as that's irrelevant to
me in my kitchen as opposed to laboratory controlled temperature
environment.
N.
> Date: Fri, 1 Oct 2010 19:09:59 -0400
> From: [email protected]
> To: [email protected]
> Subject: Re: CS> Distilled Water of .000
>
> Those number don't mean anything to me without researching each of
> them. What is important is the resolution of each. If the resolution is
> 100 uS for instance than anything less than 50, and maybe less than 100
> will register 0. Since the expected readings should be between .2 and 3
> or so, the meter must be able to measure and display such readings.
>
> Marshall
>
> On 10/1/2010 6:37 PM, Neville Munn wrote:
> > I don't use a PWT meter but the Com 100 EC/TDS/TEMP meter has *never*
> > shown zero, the Com TDS3 shows zero in practically *every bottle*
> > of DW I've ever bought, and the Hanna TDS1 shows zero on the *odd*
> > occasion. I use El Cheapo Black and Gold DW from Foodland, or IGA I
> > think it's now called.
> >
> > N.
> >
> > > From: [email protected]
> > > To: [email protected]
> > > Subject: Re: CS> Distilled Water of .000
> > > Date: Fri, 1 Oct 2010 15:16:20 -0400
> > >
> > > Marshall, the only place I have seen and used distilled water which
> > > tests on my PWT at .000 was in Australia, Perth to be exact, this
> > > distilled water is made specifically for those with kidney problems,
> > > and for the Kidney Foundation. I went to the factory which produces
> > > it and you should see the machinery they have for making same. You
> > > would delight in the factory it is a beauty to be sure, clean as a
> > > whistle and smooth as a babies bottom
> > > operationally !!!!!
> > > Take good care
> > > Regards
> > > Sandee
> > >
> > >
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