connecting the psa 19
connecting the psa to your computer
check that the psa is loaded with a suitable battery (preferably fresh) before you start connecting.
1 connect the supplied usb cable to your computer's usb port.
2press 4 to open the battery compartment. connect the other end of the usb cable to usb in, (found inside the battery compartment.)
3turn on your computer.
psa display: 
appears.
buttons on the psa are automatically locked during usb connection.