I'm having problems with the instant salinity registering very low readings on one polarity and then accurate readings on the other. The instant salinity will be something like -1900 on one polarity and then will show -3100 on the other. The amps and voltage are different also. I know I have about 3200 ppm in the pool
The manual says to switch polarities on a T-15 turn it off and back to auto. So, it is my understanding that each time you go through that sequence, it switches polarity. It is also my understanding that the salt reading is just a table look up based on the resistance the cell is sensing through the water and the temperature. There is not a "salt sensor" on the cell.
So, if I cut it off and back to auto, every other time the reading will be low. Does this mean I have a cell problem or a control box problem? I took the cell to the store yesterday and it passed. I saw them do the test and it did pass. I have also cleaned it yesterday but still having the problem with low salt every other time it cycles. If it is on 50% it will run for an hour and be off for an hour and then when it comes back on it will be on the other polarity.