Rodi TDS not zero after resin swap

[kris2001]

Checked TDS... after resin swap :

193, 3, 6 ppm (line 1,2,3 )

Time to change membrane?! What's causing this?

Btw
I made 40g rodi after resin swap.

 

[Kingsley_Reef]

Wow what system are you using?

 

[Opus]

I'm assuming the reading is before RO membrane, after membrane and then after DI. I would make sure you didn't put the DI cartridge in upside down. It will cause a bad reading. If that is ok, then make sure the DI resin is well packed in. If that is good, then swap out the tds meters and use the first or second one to read the after DI spot. Personally I only use the handheld readers.

 

[kris2001]

Wow...I swapped in a hurry. Packed up well. Maybe it's upside-down.... lemme check evening. Here's pic. Btw... the 3 prong reader works great ,tested weekly before swap.
Also have a backup..single reader near the output that's matching the 3rd value post DI.... thx.....