Suppose that you wanted to brew a batch of colloidal silver to some strength or volume that is not in the SilverTron's menus. Perhaps you wanted to make 1 gallon of 100 ppm but there is no menu choice for that combination. One way to do that is to bypass the auto shutoff system and use the SilverTron as a constant current system.
To do that, simply set the ppm and volume to the maximum, 4 liters and 320 ppm. Then you would calculate a run time based on your mA setting and time the run.
Calculate the run time: Minutes = (ppm * ml * .015) / mA.