I think the problem with various labs giving different results comes
mostly from using different methods. The same type equipment calibrated
the same way should be pretty close in results to each other.
Ken
At 11:01 AM 4/14/2003 -0700, you wrote:
Hi James,
Not only can they be off 2% of full scale but they read only about half
the ionic portion so that takes the readings down closer to zero than the
much more accurate PWT.
Example...if the ionic content is 10 the TDS will read about 5. The PWT
will read it at about 10.
I cannot comment about different labs other than to say our tests were
done at two separate labs using AA spectrophotometry and the readings were
approximately the same. Go figger.....
Regards,
Trem
----- Original Message -----
From: <mailto:apothec...@cox.net>James Allison
To: <mailto:silver-list@eskimo.com>silver-list@eskimo.com
Sent: Monday, April 14, 2003 10:16 AM
Subject: Re: CS>Re:CS>get both kinds here
On the subject of the TDS1 tester, in my opinion, while I agree that the
TDS1 "can" be off by 20ppm, in the "hundreds" of units I've tested, I have
never found one to be off by more than one or two points, unless it was
actually a faulty meter that wouldn't even read the calibration sol
correctly. Just because something has the potential to do something,
doesn't necessarily mean that it will always do so. Just because
lightning "can" strike you and kill you, doesn't mean that it will.
Again, only my opinion; the TDS1 is a great meter, and gives one a fairly
good idea of where they're sitting ppm wise if they are making ionic
silver. If one is truly a perfectionist, the only real way to tell the
ppm is to send your stuff to a lab, and even then from what I understand,
if the same samples from one batch are sent to two different labs, you're
going to get two different reports.
Yours in health,
James Allison
----- Original Message -----
From: <mailto:t...@silvergen.com>Trem
To: <mailto:silver-list@eskimo.com>silver-list@eskimo.com
Sent: Monday, April 14, 2003 9:32 AM
Subject: Re: CS>Re:CS>get both kinds here
Hi Catherine,
NO. I guess you didn't get the jist of what I said. The TDS can be off
as much as 20 or 40 at ANY reading depending on the unit's full
scale. You cannot reliably measure something in the range of .1 to 3.0
with a meter that has an accuracy of +/- 20. It's for measuring in the
range of a few hundred.
Use it to measure the amount of minerals in your tap water and it'll work
just fine.
Trem
----- Original Message -----
From: <mailto:ccr...@adelphia.net>C Creel
To: <mailto:silver-list@eskimo.com>silver-list@eskimo.com
Sent: Monday, April 14, 2003 9:07 AM
Subject: Re: CS>Re:CS>get both kinds here
Dear Trem,
You said:
<<It's for measuring the Total Dissolved Solids in water such as tap
water. That usually ranges from 200 to 600+ uS (microsiemens) which is
just right for the TDS meter to measure.>>
So a TDS is good for testing the quality of the distilled water we use?
Thanks!
Regards,
Catherine
--
The silver-list is a moderated forum for discussion of colloidal silver.
Instructions for unsubscribing may be found at: http://silverlist.org
To post, address your message to: silver-list@eskimo.com
Silver-list archive: http://escribe.com/health/thesilverlist/index.html
List maintainer: Mike Devour <mdev...@eskimo.com>
