In the Radiacode application, you can display not only the spectrum of accumulated emissions on the graph but also compare it with the previously measured background spectrum. You can display both the spectrum and background graphs simultaneously in overlay mode or show a graph of the difference between the current spectrum and the background values.

To utilize a background, you must first measure it with the device over a period of time. Then, save the resulting spectrum to the spectrum library. To do this, tap the local menu call button in the spectrum window:

Select “Save Spectrum to Library” from the dropdown menu. You will be prompted to name the spectrum. The spectrum will be displayed with this name in the library list. If you leave the “Set as Current Background” option enabled, then after saving, the spectrum will be displayed on the graph as a background. You can also select the background from the spectra library in the future.

There are two modes for displaying the spectrum and background. In overlay mode, the background graph is drawn on top of the spectrum graph—the spectrum is shown in orange, and the background in green. In the second mode, the difference between the spectrum and the background is displayed, and the graph is colored purple.

In the mode that displays the difference between the spectrum and the background, the difference in the count rate is shown. This is because the background and the current spectrum always have different accumulation times, making it illogical to subtract the number of accumulated pulses.

If the application detects such a situation, it issues an appropriate warning. The Radiacode device can identified by its serial number.