Oh, I think I see. I would have thought that if one meter which has resolution
increments of '.1' shows a reading *higher* than '1.', then the meter which
reads in increments of 1 would display 1 instead of 000 when the first meter
registers higher than 1 initially? If that's your "...water which is 0.4..."
thing then I'll have to do some reading up.
Example: My records show the Com100uS reading has to exceed 2.6 before the
ComTDS3 reading moves from 000 to 001ppm.
As most meters are set up or calibrated taking a water temperature compensating
factor into account, would this also have a bearing on the apparant different
readings from one manufacturers meter to another? Meaning, not only the
calibration fluid used, but also the built in temperature compensation may have
an influence on the reading of a uS meter compared to a ppm or TDS meter as
stated above?
Example: My records show the ComTDS3 *always* shows a higher water temperature
of DW straight from the bottle anywhere between 1 to 1.8 degrees compared to
the Com100uS meter, is the aforesaid an explanation for that?
Curiously, after EIS/CS production that temperature difference in the majority
of cases seems to reduce after the solution has been in storage for a while,
like down to 1 degree or lower, I find it rather strange that it doesn't remain
the same difference as it was straight from the bottle.
N.
> Date: Fri, 1 Oct 2010 23:14:28 -0400
> From: mdud...@king-cart.com
> To: silver-list@eskimo.com
> Subject: Re: CS> Distilled Water of .000
>
> 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
> >
