In rare cases, using a LabQuest 2 or 3 connected to a SpectroVis Plus or Go Direct SpectroVis Plus may cause issues such as locking up the LabQuest software, not recognizing the spectrometer, or showing extremely erratic data. This is a USB compatibility issue that shows up between some SpectroVis Plus units and some LabQuest 2 or 3. The issue is frustrating because it may only appear intermittently.

Try the following:

1) Make sure you are using the latest version of LabQuest software. For LabQuest 2, software version 2.7.2 or newer. For LabQuest 3, software version 3.0.7 or newer.
2) Reboot the LabQuest. Tap on the home icon, tap System, tap Reboot.
3) If it is a Go Direct SpectroVis Plus, make sure the AC power to the spectrometer is not connected. Remove the battery from the spectrometer. If all LEDs are illuminated see My Go Direct SpectroVis Plus is not identified or reports "Calibration Failed".. If you are seeing an error message, contact chemistry@vernier.com
4) Verify that your USB cable works. Switch to a shorter USB cable. Remove any adapters from the USB cable.
5) Insert a USB hub between the LabQuest and the Spectrometer. If available, use a powered USB hub. **A powered USB is typically the most common fix for this issue.**
6) Verify that the SpectroVis Plus can be used without incident on a computer or original LabQuest.
7) Try using a different LabQuest 2 or 3.

This issue is uncommon. If you need to use the SpectroVis Plus right away, using a powered USB hub is the simplest workaround.

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.