calibration

My salt level is 4000, actual. My pureline swg indicates 1700 and gives me low salt and check cell error and cuts right off. The book says press diag button 9 times to get to recalibrate. I only go to 8 options, then starts over on menu, but no calibration option. I've cleaned the cell 3 times...

My Aqualink 3.0 is suddenly displaying the wrong pool temps (and the displayed temp sometimes bounces around to being VERY off and much lower than it really is). I have a manual pool thermometer to check. . Not sure if this is an Aqualink issue or pool thermostat. The app also will not let...