Quote Originally Posted by Ozzzz

Does anyone have any idea what the "Lock in Salt PPM" option does as described on the aqua-rite website. Is this some sort of calibration procedure ?
no, this is not a calibration procedure. the goldline units ususally show an average salt reading of the on times of the cell. This option will show the the 'instant salt reading' which is the reading of salt in the cell at the moment you press the button. This could be differetnt from the average reading because the reading is somewhat dependant on the temp in the cell when the reading is taken. The average reading will be over different temperature ranges becuase the cell heats up as it generates chlorine.