Thanks..........I think I even understand some of that, LOL.
sol
Ode Coyote wrote:
A TDS meter takes +/- 2 uS of conductivity to read 1 PPM and does it
in whole digits.
That makes the resolution of an EC meter that only displays whole
digits, about twice that of a TDS meter.
Take out around +/-.9 % for not having decimal places and that's
around 90% as good a resolution.
Subtract that from 2 digit EC resolution and you get a TDS meter that's
+/- 40% as good as an EC meter that has a decimal place.
TDS meters sometimes have a nasty habit of skipping a digit while
calibrating them too... it just won't display a 5 or a 7 as you twist
the screw...jumping from 4 to 6, for example.
That's, at LEAST, a 4 uS **possible** built in read error and could be
as much as almost 8 uS with no way to tell which...depending on where on
the scale you are and that particular meter.
I've never seen an EC meter skip a digit.
Ode
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