Algae Posted March 19, 2011 Share Posted March 19, 2011 I just changed over from a single handheld TDS meter to a dual. I hooked it up after particulate, carbons, and RO. Going in and out of DI canisters. When I first turned it on it it registered 003 and after DI 000. After a minute it registered 000 on both sides of the DI! My particulate filer is new but the other filters, including the RO membrane is is over 1 1/2 years old. I usually run about 20 gallons of water per week. Our water in Eugene, out of the tap is typically 40-50ppm. Can an RO that is this old be that clean or is it that the meter is off? I read on the instructions that it is calibrated at the factory for 350ppm. Should I consider re-calibration? I can re-calibrate this model. I have not heard of others having this problem. Quote Link to comment Share on other sites More sharing options...
bobkat330 Posted March 19, 2011 Share Posted March 19, 2011 i have seen tds test 001 on a system that was 2 1/2yrs old. So just wait till more people give you info/experiance. Quote Link to comment Share on other sites More sharing options...
grassi Posted March 19, 2011 Share Posted March 19, 2011 I always test 0 and 0. So was a friend of mine with the same meter. He bought a better tds (not the inline ones) and he can see some ppm. I consider mine like a souvenir. I'm gonna get a flow meter, so I will know when is time to change the filters Quote Link to comment Share on other sites More sharing options...
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