Clicking Download during a two-point calibration does not change the measured values of oxygen.

The two-point calibration was not performed correctly. After scanning the tau values, a single click on the graph area was not performed.

Follow the instructions in this manual exactly as written in the NeoFox on page 13 under Two-Point Calibration.

At startup, NeoFox's controls appear to be disabled. No values display or the device shows other signs of not uploading data.

The NeoFox drivers and firmware versions are not compatible.

Update the NeoFox firmware to version 2.0 or higher and update NeoFox Viewer Software to the latest version. You can access software downloads here.

During hardware installation, the Found New Hardware Wizard” can’t find the driver or .sys file for the NeoFox.

The NeoFox directory isn’t included in search.

When prompted, choose to install from a specific location, then include the NeoFox installation directory in your search. This directory is located at “C:\Program Files\Ocean Optics\NeoFox Viewer” by default. The drivers can be found in the USB Drivers directory located here.

After running a VI that calls the NeoFox DLL, LabView crashes when that VI is closed.

The VI passes a function in the library an uninitialized string.

The library functions generally assume that any strings passed are already initialized. Therefore, be sure to pass only initialized strings. Better error handling for this error was added in DLL version 1.89, but you should still use this convention to avoid unnecessary complications.

After setting the display units to anything other than ppm, the display will not return to percent oxygen.

This problem was resolved in version 1.92 of the NeoFox Viewer. Contact Ocean Optics if you see this error in a more recent software version. Previously, this problem was solved by reinstalling the NeoFox Viewer software.

A fatal error or critical error warning message appears at startup and prompts to continue or exit the application. After continuing, the FFT view does not seem to work.

This problem seems to occur when the application starts with the FFT View Window active.

Select Continue, then select the waveform or decay form view. Close the application and then restart. The problem should not occur again. If the problem persists after completing these steps, reinstall the NeoFox Viewer software.

The temperature probe reading appears erratic or is drastically incorrect.

Excessive force was applied to the connector of the temperature probe cable (even without bending the cable itself), causing the electrical connection between the connector plug and the jack to degrade. The result appears to be a higher contact resistance, which adds to the measured resistance of the thermistor and corrupts the temperature reading.

Ensure that the temperature probe does not bend near the connector. To do this, check the cable during measurements or tape the probe cable down to the desk near the unit.
If this doesn’t solve the problem, try to bend the cable gently near the connector, but ensure that no pressure is applied to the connector itself.