RO/DI Meter

[pretendo]

Hey Guys I just replaced my DI resin, after the color changed.  Before that I was getting 0 PPM with the "out" meter. When cleaning the unit I took out the meter and put it on the floor for a bit. After getting everything setback up, my "in" is lower than my "out" -  do these kind of meters malfunction after time? "in" says 5 PPM "out" is saying 6-7 PPM

using this HM meter

 

https://www.amazon.com/gp/product/B001EHAZGW/ref=oh_aui_search_detailpage?ie=UTF8&psc=1#customerReviews

 

I guess ill let it run for a bit and see - and is there a thing as packing the DI resign too tight?

[Clown79]

34 minutes ago, pretendo said:

Hey Guys I just replaced my DI resin, after the color changed.  Before that I was getting 0 PPM with the "out" meter. When cleaning the unit I took out the meter and put it on the floor for a bit. After getting everything setback up, my "in" is lower than my "out" -  do these kind of meters malfunction after time? "in" says 5 PPM "out" is saying 6-7 PPM

using this HM meter

 

https://www.amazon.com/gp/product/B001EHAZGW/ref=oh_aui_search_detailpage?ie=UTF8&psc=1#customerReviews

 

I guess ill let it run for a bit and see - and is there a thing as packing the DI resign too tight?

When packing the di resin it's best to put in a little at a time and tap the canister, then add more, tap again. This allows the di resin properly without gaps.

 

 

The tds meters do need cleaning with vinegar from time to time. There are instructions on it online or with the ro/di unit

[Porkpie5000]

Also make sure the little pins inside are aligned correctly. You should be able to see them next to each other if you look through it. 

[pretendo]

Its back to 0 PPM I apologize for jumping the gun. it  did not seem right for the "in" to be lower than the "out"

[paneubert]

Yeah, read up on TDS creep.  It isn't just limited to RO membranes if you ask me.  Not super surprising you saw what you saw.  But now you know!