Or if your water temperature is still cold (below 65 degrees), the unit will give you a false low salt reading. Rely on your test result and do not oversalt your system. With the Aquarite, oversalting your pool will require you to drain/dilute, refill and rebalance the water.
When you run your test, are you able to get the Cell Amps and Volts? These figures reveal quite a bit of your operating conditions. Hayward should be able to provide the normal operating amps and volts.