Yes, the good news is that it is very easy to verify the system's operation, and there isn't a lot of gray area. Find your model's guide on www.circupool.com/help, and take a look at page 6 to see exactly how to verify that your system is working correctly. A salt system only needs salt in the water and power going through the cell. It is always checking for that to ensure it is creating the full and normal amount of chlorination. Remember that the other side of the equation is the water's chlorine demand - which is always changing. The guide will also help pinpoint some very common issues that can ultimately deplete measurable free chlorine to zero even with a fully functional chlorinator.