Verify USB driver installation in Windows
Once the GMC-500/GMC-500+ is connected to a computer, from the device manger, you should
see which COM port is assigned to the unit . See the example below. Windows assigned COM3 to
the GMC-500 unit in this example.
For the data viewer or the data logger software, selecting COM5 will establish the connection to the
GMC-500 Geiger counter for the above example