Appendix B Sensitivity To Common Isotopes - Radiation Alert Inspector + Manuel D'instructions

Averaging Periods:
CAL Factor Range:
Timer:
Alert Range:
Accuracy:
Beeper:
Anti-Saturation:
Temperature Range:
Power:
Size:
Weight:

Appendix B Sensitivity to Common Isotopes

Typical GM tube efficiency for 4 Pi geometry at contact
Isotope
Beta
14 C
210 Bi
90 Sr(Y)
32 P
Alpha
241 Am
Display updates every 3 seconds, showing the
average for the past 30-second time period at
normal levels. The averaging period decreases
as the radiation level increases. Refer to Chapter
Operation- Autoranging, Display update.
001 to 199
Can set 1-10 minute sampling periods in one minute
increments, 10-50 minute sampling periods in 10-
minute increments, and 1-24 hour sampling periods in
1-hour increments
mR/hr: 0 to 50
CPM: 0 to 160,000
± 10%
Operational in Audio mode only
Readout holds at full scale in fields up to 100
times the maximum reading.
-10° to +50° C , 14° to 122° F
One 9-volt alkaline battery. Battery life is minimum
2160 hrs at normal background. Minimum battery life
is 625 hrs at 1 mR/hr.
150 x 80 x 30 mm (5.9" x 3.2" x 1.2")
323 grams (11.4 oz) including battery
E max. MeV
49 keV Avg. 156 keV Max.
390 keV Avg. 1.2 MeV Max.
546 keV and 2.3 MeV
693 keV Avg. 1.7 MeV max.
5.5 MeV
3
Efficiency
5.3%
32%
38%
33%
18%
25