Carey1465
New member
Just got my new RO/DI system and I ordered the TDS monitor also. It says to calibrate it but not sure if I really need to. The meter reads 40ppm going in and coming out reads 0ppm. I called my buddy up and he said his water going in is 300ppm+ Does my 40ppm sound a little off?? Should I calibrate it? Thank you and have a good weekend everyone