Rebels23

Advanced Reefer
Location
Long Island
Hi Folks,

My tds meter out of my RO/DI is reading 777 ppm. I have a 6 stage with an inline triple TDS meter. I just changed the battery and the cotton filter but for all outputs it still reads 777. Any idea why that may be happening
tdsmeter.png
 
Last edited:

Matt L.

Experienced Reefer
Manhattan Reefs
Location
Scarsdale, NY
For a reading that high and consistent, it sounds like the meter may be bad.

Did it rise up slowly or just start reading high all of a sudden? If suddenly, it's unlikely an RO/DI unit that is producing < 1 tds all of a sudden starts producing super high tds water, even with a mechanical failure. These meters have poor precision in the high range and when actually reading high tds water, the value jumps around a lot.

I assume you get the same reading consistently across all 3 channels?

I would borrow a pocket tds meter and check the output. If it's low (< 1) then your meter is bad.

Matt
 

Rebels23

Advanced Reefer
Location
Long Island
Thanks Matt. It just went high all of a sudden and it was the same reading across all three channels. I was able to borrow a pocket TDS meter and it showed the water being produced at zero ppm. So it looks like a bad meter.
 

Josh

in the coral sea...
Manhattan Reefs
Real Reefer
Supporter
Location
Union Square, NY
These things should be 0-100PPM when you get them, if it is not correct, take the sample back immediately.

FYI NYC has the best water, expect to see 30-70PPM.
 

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