When attempting to calibrate or use your Tracker Legacy Instruments, you may be presented with a Null symbol, ø.  If you see this symbol, Tracker does not have a connection to your instruments.

Please try the following steps to connect to your devices:

• Please power off the interface box
  • Disconnect the Interface box from the computer but unplugging the serial cable.
    • If using a serial to USB adapter, please unplug both the usb and serial sides to the adapter.
  • Disconnect the device cables from the devices and from the interface box. 
  • Plug all cables back into their appropriate positions.
  • Power on the interface box

• Open device manager on the computer.  (Hold the Windows key and press r.  Type in devmgmt.msc and press enter)
  • Find and expand Ports (COM & LPT)
  • Locate the COM port that your Tracker box is using.  If you are using a serial to USB adapter, find the listing that corresponds to the manufacturer (e.g., Keyspan)
    • Record the COM port or make a mental note of the COM port number
  • Tracker 5 - Click System and select Communications Port.
    • Select the COM port that you recorded previously.
  • Tracker 4 - Please run C:\TrackMe\serial2.exe.
    • Select the COM port that you recorded previously.