Thermo Scientific RadEye SPRD-GN Operating Instructions Manual page 69

As well, the test adapter can be used to quickly verify the
proper function of the nuclide ID – both in the field and for
training purposes! Typically a Lu-176 ID is indicated after less
than 60 s
Furthermore this test adapter can be used for verification of
the internal detector high voltage. Start the Lu-Adjust via
submenu "Settings" -> "Lu-Adjust" without the test adapter.
During the first seconds the RadEye checks the background.
Please note that the background must be smaller than 50 cps.
When the background measurement is complete the user may
place the test adapter:
RadEye SPRD-GN
Pi/Iw/Ff 25.08.2016
Date and time of the last
successful Lu-Adjust
DB-103 E 4-9