## Serial Port

Choose the Computer's serial port that is connected to the K3. Click the arrow to open a list of available ports, then select the port you have connected to the K3. See Finding the appropriate serial port for a USB to Serial Adapter if you're using a USB to Serial Adapter and are not sure which port to choose.

## Refresh Port List

Click to update the list of available serial ports, which may be helpful if you plug in a USB to Serial Adapter after the program has started.

## Test Communications

Verifies that the K3 Utility can communicate with the K3 and determine its RS-232 bit per second setting.