This is the first season I am using a Autopilot Dig 220 with a SC36 cell and I am not sure if it is operating correctly. I started with FC of 4ppm and it is dropping. I set it at 50% per instructions and sometimes if I look at the display it shows different valves. Once it read 12 another time 25 and yet another 76%. Is this normal, is this showing changes because of the temperature sensing adjustment? The water temp started out cold  but been heating and it got up to .
Thanks and any help is appricated,