ORTEC
®
Detective-EX/DX
®
-100T Portable HPGe Spectrometer — User’s Manual 931040P / 1014
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emitter is present (beta emitters typically producing counts over a broad range of energies).
Move closer to the source and count longer to determine the nature of the suspect item.
4.1.1. Comments on “Found Nuclide” Screen Messages
RDD Detected
This message is posted when calculated activity is >100 mCi, whether the activity is from
threat or innocent nuclides. The gamma count-rate and dose-rate meters on the Survey Mode
and ID Mode screens display a flashing red background and extremely high count and dose
rates.