In rare instances, connecting a LabQuest 2 or 3 to a SpectroVis Plus or Go Direct SpectroVis Plus can lead to issues such as the LabQuest software freezing, the spectrometer not being recognized, or displaying highly erratic data. These problems typically stem from a USB compatibility issue that occurs with certain SpectroVis Plus units and some LabQuest 2 or 3 devices. This issue can be particularly frustrating as it may only occur intermittently.

Try the following:

  • Make sure you are using the latest version of LabQuest software.
  • Reboot the LabQuest.
    • LabQuest 2⚊Home > System > Reboot
    • LabQuest 3⚊Choose Reboot from the Settings screen
  • Check your USB cable – Make sure it works properly.
  • Try a shorter USB cable, if available.
  • Remove any USB adapters or converters from the connection.
  • Use a USB hub between the LabQuest and the spectrometer.
  • If possible, use a powered USB hub — this is often the most effective fix for connection issues.
  • Test the spectrometer on a computer running the free Spectral Analysis software to confirm it works independently.
  • Try connecting to a different LabQuest 2 or LabQuest 3 to rule out hardware-specific issues.

If it is a Go Direct SpectroVis Plus:

Also see My Spectrometer is not working properly. It won't calibrate or is giving very noisy data.

If the problem persists, please contact Vernier Technical Support (email chemistry@vernier.com) and provide the following details:

  • The model of spectrometer: SpectroVis Plus or Go Direct SpectroVis Plus. Include the serial number of the spectrometer.
  • Software version of the LabQuest. To find this, tap the Home icon, then tap System, then tap System Information.
  • A summary of the troubleshooting steps you’ve already tried.
Published: March 29, 2018. Updated: April 29, 2025.