Thermo Scientific RadEye PRD-ER Operating Instructions Manual page 117

12. Annex
12.1 Interrelationship between false alarm probability
and sigma value
Sigma Threshold at
10 cps background
2
3
4
5
6
7
8
9
RadEye PRD-ER
Iw/Tr/Ff 06.07.2015
Mean time to false alarm
15
18
21
24
26
In practice, there are almost no false alarms at a constant
29
32
35
DB-066 E
in seconds
22
370
16000
1000000
irradiation
Mean number of false alarms
per working day (8h)
1310
77
1.7
0.03
12-1