I recently purchased new RO
cartridges for my RO
system - the pre-filter, the carbon filter, the DI
resin, and the main membrane. After changing the filters, the PPM
was 000. This was about 2 weeks ago. Yesterday, I turned on the TDS
meeting and found the inflow was reading normal - approx. 143ppm but the outflow was all over the place and as high as 700ppm. I thought I should change the batteries on the meter but the readings are still very high on the outflow.
Could there be something wrong with the meter considering I just changed the filters??