ORTEC
®
Detective
®
X Handheld Radioisotope Identifier
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Figure 47. Am-241 Unshielded Identification Latched by the Acknowledge Button
4.6 DETECT MODE
The Detect Mode screen (Figure 48) is the startup screen. Use it to survey areas and fixed or moving objects
for sources of radioactivity.
The Detect Mode screen displays Signal Index and SNM Index strip charts in the middle of the screen. They
are real-time indicators of the presence of radioactive material, updating every 0.5 second and scrolling from
right to left.
The Signal Index (Section 4.6.1) indicates the presence, above background, of all gamma-ray
emissions.
The SNM Index (Section 4.6.2) indicates whether detected gamma-ray emissions are characteristic
of Special Nuclear Material. If the neutron detector is attached, the neutron flux is included in the
SNM Index calculation.
Figure 48. Detect Mode Screen
