TDS Meter reading out of RO/DI

[Rebels23]

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

 

[Matt L.]

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]

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]

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.

 

[Rebels23]

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.

Thanks Josh. I miss NYC water

 

[Buckeye Hydro]

Check to make sure the plug where the wires enter the top of the meter is fully plugged in.

Russ

 

[scottlarmr]

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 TDS aquarium.

Matt

I am reading high TDS (400s) with a TDS meter. I want to make sure it's not incorrect because of the calibration. Is there a way to check TDS without one of the digital TDS meters? Just watched the latest live stream and @Cory said he doesn't like using them so I was curious what the other ways are.

 

[reefman]

why not just use a tds pen to verify? i doubt any tap water can be 400ppm