I have a few questions about calibrating a autopilot DIG-220. Before the server crash I believe there was a calibration procedure listed. Can someone repost that?

Also I am not sure if I really need to recalibrate my unit. It was installed about a month ago. I just took a sample to the pool store, it appears the pool store sodium readings are lower then what the Autopilot is showing. (By 500 ppm). My question is it common to have to calibrate a new Autopilot?

Also what are the optium pool chemistry levels for a salt chlorinator?

Tom