- Turn on the StellarRAD’s main spectrometer engine (right side power button) and tablet (top).
- Launch the StellarRAD App.
- Verify software and spectrometer engine connection.
- Turn on your LED or device under test and capture its raw spectrum in the Scope tab.
- Adjust the integration time in the Device Settings menu and then press the capture button or use continuous mode. Set the integration time so that your spectrum is not saturated but as close to 65,000 counts as possible. A signal with a flat top indicates that you are saturating the detector and should decrease your integration time. If you do not see any signal, increase your integration time until you do.
An example of saturation – notice the flat top – decrease integration time. 
An example of low signal – increase integration time. 
- Choose your favorite Device Settings such as spectral smoothing controls or samples to average. A pixel box car set to 3 and averaging set to 5 often gives nice results. Press the capture button or use continuous mode to see the effect.
- Next, cover or turn off your LED and select the Take Dark Spectrum button in the toolbar at the bottom of the screen. You will see your baseline drop to zero.
- Click on the Watts tab to see your LEDs spectral curve and power output. Press the capture button or use continuous mode to see your results.
- All radiometric values should be updated with each measurement and displayed in the list tab. View CIE chart tab, CRI tab, and solar/uv tab for measurement data and results.
- Save Data as .SSM, .IRR, Screenshot, or PDF report with all parameters listed.
- Share via E-mail or transfer via USB. Note: For series 3, if you share via email and change the WiFi network you will have to re-connect to the device in order to begin collecting spectral data again.