BNC 971 Food-SSAFE Analysis Kit - Manual (Page 5)

Food-SSAFE Operation Manual Page 6 of 20
5.
Taking a Background Measurement
a. Remove the detector from the shield, take the lid off the
shield, remove the K-40 standard, and recover the
Marinelli spacer from the standard.
b. Place the spacer into a clean, empty Marinelli. Put the
Marinelli into the shield, replace the cover, and put the
detector through the hole in the shield.
c. From the Util menu select Acquire Background…
d. A message will pop up asking for confirm that an empty
Marinelli is on the detector and stating how long the
background acquisition will be for. The default time is
900 seconds.
6.
Analyzing a sample
a. Remove the detector from the shield, take the lid off the shield, remove the empty
Marinelli, and recover the Marinelli spacer from the standard.
b. Place the sample to be analyzed in the shield. (If you are analyzing an air sample filter or
wipe sample, insert the wipe/filter spacer first and put the sample into that.)
c. Place the Marinelli spacer into the cavity in the Marinelli.
d. Put the lid on the shield. Stick the detector through the hole and seat it on the spacer.
e. If a spectrum is currently displayed, tap the “X” button along the bottom of the screen (or
use Util|Clear Spectrum) to clear it. If the spectrum hasn’t been saved a warning to that
effect will be displayed, giving you the opportunity to save it if desired.