Programming instructions
QS4 Technical Reference Manual
4.17
Table 4-5: %Obscuration levels for SIGA–IPHS, SIGA–PS, and SIGA–PHS
Alarm Obscuration Levels
Sensitivity Settings
Most
More
Normal
Less
Least
%Obscuration
1.00%
2.00%
2.50%
3.00%
3.50%
Prealarm Settings
Prealarm Obscuration Levels
95%
0.95%
1.90%
2.38%
2.85%
3.33%
90%
0.90%
1.80%
2.25%
2.70%
3.15%
85%
0.85%
1.70%
2.13%
2.55%
2.98%
80%
0.80%
1.60%
2.00%
2.40%
2.80%
75%
0.75%
1.50%
1.88%
2.25%
2.63%
70%
0.70%
1.40%
1.75%
2.10%
2.45%
65%
0.65%
1.30%
1.63%
1.95%
2.28%
60%
0.60%
1.20%
1.50%
1.80%
2.10%
55%
0.55%
1.10%
1.38%
1.65%
1.93%
50%
0.50%
1.00%
1.25%
1.50%
1.75%
45%
0.45%
0.90%
1.13%
1.35%
1.58%
40%
0.40%
0.80%
1.00%
1.20%
1.40%
35%
0.35%
0.70%
0.88%
1.05%
1.23%
30%
0.30%
0.60%
0.75%
0.90%
1.05%
25%
0.25%
0.50%
0.13%
0.31%
0.88%
20%
0.20%
0.40%
0.50%
0.60%
0.70%
15%
0.15%
0.30%
0.38%
0.45%
0.53%
10%
0.10
0.20%
0.25%
0.30%
0.35%
5%
0.05
0.10%
0.13%
0.15%
0.18%
Note:
Shaded prealarm settings not available for SIGA–IPHS
Table 4-6: %Obscuration levels for SIGA–IS
Alarm Obscuration Levels
Sensitivity Settings
Most
More
Normal
Less
Least
%Obscuration
0.7%
1.00%
1.20%
1.40%
1.6%
Prealarm Settings
Prealarm Obscuration Levels
95%
0.67%
0.95%
1.14%
1.33%
1.52%
90%
0.63%
0.90%
1.08%
1.26%
1.44%
85%
0.60%
0.85%
1.02%
1.19%
1.36%
80%
0.56%
0.80%
0.96%
1.12%
1.28%
75%
0.53%
0.75%
0.90%
1.05%
1.20%
70%
0.49%
0.70%
0.84%
0.98%
1.12%
65%
0.46%
0.65%
0.78%
0.91%
1.04%
60%
0.42%
0.60%
0.72%
0.84%
0.96%
55%
0.39%
0.55%
0.66%
0.77%
0.88%
50%
0.35%
0.50%
0.60%
0.70%
0.80%
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