This procedure will initialize the SP2:

When you select [Reset], the display will show “Rst” ( Reset ). Press [+/Yes] once again, and the SP2 will ask you if you are sure. Press the [+/Yes] button one more time and then you will see a prompt asking “rL?” ( Really ) to be sure for the last time. This will prevent you from executing a hard reset inadvertently, which erases all user‐stored data. One more push of the [+/Yes] button will initialize the SP2.