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I just got a TDS meter thing and i have no idea what the readings mean! It didn't come with any instructions or anything]:| Anyway, i tested the water from my RO unit and it said it was 71. Is 71 good or bad or ok???? The water from my tap was 222....Iam lost, help!

ashley

Hi,
WOW, are you a "techie" or what?
I don't even have one!

Total Disolved Solids (TDS) is a meter that measures
the current between two points (the probe) with a
given difference in potential (voltage).

Read the information on this site:

http://www.waterfiltersonline.com/tds-sources.asp

Since RO water is more "pure" than tap water or
your tank water, it makes sense that its reading should
be lower.

Frank


-->>> The Confidence of Amateurs, is the Envy of Professionals <<<--

Ontario,

You should be able to go to the manufacturer's website to pull information on the meter. Your reading on the unit may be tds or it may be a value related to tds. For example a reading of 21 may be 21 micro siemens or it may be 42 micro siemens.

What is important is that the unit is measuring the fact that your RO is about 1/3 the conductivity of your tap water. Of course, if you have not calibrated your unit, that measure may be distorted. You should have received calibrating fluid and instructions on calibrating with the unit.

If not, go to the manufacturer's website...

PS If your unit is calibrated, your RO water is testing a little high. My RO unit brings conductivity to 30 ms. A higher reading from your RO may indicate that it is time to change filter units or backflush your membrane.

Last edited by Bob Wesolowski at 21-Dec-2004 02:14

Last edited by Bob Wesolowski at 21-Dec-2004 17:03

__________
"To steal ideas from one person is plagiarism; to steal from many is research."
researched from Steven Wright

K thanks!

I don't have a website to go to, there was none listed. There was a little card thing that said it was calibrated and whatnot tho...

ashley