I'm getting a very erratic salt reading from my pool pilot. Inspected and cleaned the tri-sensor and verified a good cable by checking pin to pin continuity and no continuity between pins.
Yesterday the reading said 500 ppm, then later it showed 7800ppm. After checking out the sensor and cable I tried to calibrate it to the actual salt level of 2000 (I know that's low) but it would not take the calibration.
It seems that I need to troubleshoot to find whether the problem is the sensor or the control board.
At one point the service guy plugged a simulator into the tri-sensor cord. Can I simulate a salt level by placing a resistor between two of the cable pins?