TDS readings

[Boomer]

OK Marrone that may makes sense. So then why did he post 36 ppm and 6 ppm not .038 or .006 ?? We have seen this issue before 003, which often is 003 mS. Meaning .003 x 1,000 = 3 uS, not 3 ppm but more like 1.5 ppm

 

[marrone]

Because everyone was asking him all kinds of things and he just posted what the meter said, which was 003. All of these meters have 3 digits, so what he original posted, 36 & 6, it would have read 036 & 006.

 

[Boomer]

Ok

 

[marki24]

Mark - can you please post a pic of where you have the TDS meter hooked up to - in both places?

That would help us a lot!!

I will try to do it tomorrow

 

[marki24]

pics

Ok here is the picture of my TDS meter and my RODI as you can see the "in" *red is hooked up to the output or waste water and the (out) blue is hooked up to the filtered water. My out reading is 000 ppm and my in is 034 ppm.

 

[beerfish]

I could be looking at it wrong, but it looks like your DI is in the first canister.

You generally want the water to go to the micron filter, then carbon, RO, DI. If this is the way you have it, disregard... I haven't finished my coffee yet.

 

[MO~IDOL]

the "in" red should hook up to the yellow(before the unit) NOT the red and beeffish is right "You generally want the water to go to the micron filter, then carbon, RO, DI"

http://thesodafamily.com/s0da/ro_di.html

 

[Boomer]

That is hooked up way wrong. Please follow the link MO~IDOL gave

 

[thefilterguys]

I hope these plumbing drawings help as it appears you are running tap water into your DI first. I can't tell what the red line is but where you want yout tds meter IN and OUT probes is before and after the DI chamber. What you want to measure is the performance of your RO membrane and DI. Your DI resin should always produce zero tds and your resin should be changed at a reading of no higher then 2-3. I realize the second drawing is of a five stage unit and is just to show placement of probes.

Jim

 

[lo7100]

bulkreefsupply suggests to put the "IN" line after the filter and the "OUT" line after the DI. Then you will know when to change the filter or DI.

 

[marki24]

That is hooked up way wrong. Please follow the link MO~IDOL gave

Thanks boomer you been great help.

Anyways, Steve tanks for the link.

 

[thefilterguys]

bulkreefsupply suggests to put the "IN" line after the filter and the "OUT" line after the DI. Then you will know when to change the filter or DI.

Carbon filters will exhibit no signs of exhaustion through your tds meter. What you want to read is how well your RO membrane is performing (rejection Rate) and DI resin performance.

Jim

 

[Boomer]

So there is no confusion. The TDS meter In-Line goes to the DI In-Line and TDS meter Out-Line goes to the DI Out-Line. After the RO filter is the same as the In-Line to the DI.