Ken,
Don't you mean the TDS meter halves the uS value of the solution?
Trem
----- Original Message -----
From: "Ode Coyote" <[email protected]>
To: <[email protected]>
Sent: Friday, January 13, 2012 4:18 AM
Subject: Re: CS>PPM vs uS
The minute power is removed from the electrodes, conductivity starts
dropping and may drop as much as 50%
Once it has stopped dropping. then the uS number is about the same number
as derived by a device that actually measures PPM.
A "PPM" [TDS] meter roughly doubles the uS value of the solution.
Beyond around 30 uS, PPM/TDC and EC meters become pretty much useless as
more and more ions are forced to become non-conductive particulates in
that super saturated media.
Ken
At 09:47 AM 1/12/2012 +0000, you wrote:
Hi,
I have been doing some more reading which has got me looking for a
resolution, namely what uS do you consider to roughly figure out the PPM.
I know the reason why a typical ppm or uS meter would not give a reading
due to the ions which we do want to measure not being very measurable in
terms in electrical conductance.
But it there a rough method to measure from the stuff that does conduct.
What I am therefore asking is if my uS meter says 10 uS what ppm of CS
should I consider that to be.
I have so far been halving the value so that I would have said that was 5
ppm. This was from information I received from other posts.
Kindly help shed some light in this matter for me.
Cheers
Peace to all
Asif.
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