Dakota Ultrasonics UMX-2 - Manual (Page 71)

Dakota Ultrasonics
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5) Open windows ® ‘device manager’ and click the plus sign next to PORTS, in
order to display the complete list of all com ports in use. Look for the device
named “Prolific USB-to-Serial to determine the current port that windows ®
has assigned the device.
Note: if the com port is 1-4 skip to step #9.
6) Assuming the assigned port is other than 1-4, double click on the “Prolific”
port to display the properties dialog box, as shown above.
7) Assign a com port 1-4 to the device, and click OK to set the port.
8) Reboot your computer.
9) Power on the UMX-2 that should already be connected to your PC.