20
7. Sensitivity selection
If requirements or standards are provided for the sensitivity of the photoelectric beam
detector and a test filter, the selection of sensitivity and its test should be performed in
accordance with them. Otherwise, set the sensitivity select switch so that the sensitivity
falls within the sensitivity setting range recommended by the manufacturer in accordance
with the monitoring distance. See table 3
.
Sensitivity Setting Recommended by Hochiki
Shall Alarm
Shall not
Alarm
S1(25%)
S2(50%)
S3(70%)
0
10
20
30
40
50
60
70
80
90
100
0
10
20
30
40
50
60
70
80
90
100
Beam Span L [m]
L
ig
h
t
obs
c
ur
at
io
n
[%/L
]
Beam Span
Recommended Sensitivity
（Light Obscuration Percentage)
10〜32.1m
S1(25%)
31.8〜67.9m
S2(50%)
57.5〜100m
S3(70%)
Table 3: Sensitivity setting for Beam span
