I wasn't thinking about the ppm to uS ratio which is calibrated on my meter 
with some type of sodium solution. Rather I am interested in uS or ppm in CS . 
So if my meter says 15uS in my CS what should I *think* it is?
I know there's is no perfect answer here given that we cannot measure the ionic 
component, but surely we can make some analogous understanding of ionic content 
from the ppm
Thanks
Peace and crunchy nut cornflakes to all!
Regards Asif.



On 12 Jan 2012, at 11:42, Neville Munn <[email protected]> wrote:

> Oops, back to front, variations for ppm to uS sounds better, sorry bout that. 
>  If I double the ppm reading on a TDS meter it's close enough to my uS meter. 
>  Don't need to halve a conductivity meter.  It's about milligrams of silver 
> by weight in 1 litre of water, and short of lab analysis an EC meter gives 
> rough idea of silver content.
> 
> With my EC and TDS meters I don't see any problem with a TDS meter and 
> doubling the reading, or an EC meter and just reading it as it is.  Much of a 
> muchness in the  home to me.
> 
> N.
> 
> Subject: Re: CS>PPM vs uS
> From: [email protected]
> Date: Thu, 12 Jan 2012 11:07:56 +0000
> To: [email protected]
> 
> I was reading that some people were considering uS as ppm for CS
> Which had me think was my 15us brew a 7/8 ppm or 15. The variance is large 
> and given the discussions of high ppm recently it got me even more interested.
> 
> 
> 
> On 12 Jan 2012, at 10:12, Neville Munn <[email protected]> wrote:
> 
> Several variations to uS/PPM conversions but that's near enough for me 
> without laboratory analysis.  That's all I do, just halve it, and it's close 
> enough when comparing the 3 meters I use.  In the scheme of things with home 
> produced EIS what's a ppm or three anyway?
> 
> N.
> 
> > From: [email protected]
> > Date: Thu, 12 Jan 2012 09:47:51 +0000
> > To: [email protected]
> > Subject: CS>PPM vs uS
> > 
> > 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.
> > 
> > 
> > 
> > --
> > The Silver List is a moderated forum for discussing Colloidal Silver.
> > Rules and Instructions: http://www.silverlist.org
> > 
> > Unsubscribe:
> > <mailto:[email protected]?subject=subscribe>
> > Archives: 
> > http://www.mail-archive.com/[email protected]/maillist.html
> > 
> > Off-Topic discussions: <mailto:[email protected]>
> > List Owner: Mike Devour <mailto:[email protected]>
> > 
> >