AWACS Features AWACS™ Applications
NFS-3030 Programming Manual P/N 51345:C 11/4/03 107
Self-Optimizing Pre-Alarm
You can set each detector, except FST-751 (Heat), for Self-Optimizing Pre-Alarm (PA=1). In this
Self-Optimizing mode, the software measures the normal peak analog readings and sets the
Pre-Alarm level just above these normal peaks. This allows extremely sensitive Pre-Alarm
capability with reasonable protection against non-fire signals. The figure below shows a graphical
representation of the Self-Optimizing Pre-Alarm level:
Appendix Figure D-3 Self-optimizing Pre-Alarm Level
Detector Sensitivity
The control panel provides nine Sensitivity Levels (see Appendix Table D-2 on page 110) for alarm
detection and pre-alarm as follows:
•Alarm Sensitivity Levels You can select the sensitivity of a detector from 1-9 (1=highest
sensitivity; 9=lowest sensitivity).
•Pre-Alarm Sensitivity Levels You can select one of nine levels from 1 to 9 (0=no Pre-Alarm,
1=self-optimizing, 2=highest sensitivity, 9=lowest sensitivity). You can set Pre-Alarm
operation to Action (latching) or Alert (non-latching) and to activate Special Zones. For
instructions on programming, refer to "Pre-Alarm" on page 108.
You can set the sensitivity levels as fixed or programmed for day and night operation. For details,
refer to "Coding Functions for Panel Circuit Outputs" on page 104.
A sample sensitivity window for a laser detector:
Appendix Figure D-4 Sample Sensitivity Levels for a Laser Detector
Cooperative Multi-Detector Sensing
Cooperative Multi-Detector Sensing is the ability of a smoke detector to consider readings from
nearby detectors in making alarm or pre-alarm decisions. Each detector can include up to two other
Awacs4a.cdr
Time (days)
Prealarm Threshold
Analog
Reading
1.0% Alarm Selection 9
0.8% Alarm Selection 8
0.7% Alarm Selection 7
0.5% Alarm Selection 6
0.3% Alarm Selection 5
0.2% Alarm Selection 4
0.1% Alarm Selection 3
0.05% Alarm Selection 2
0.03% Alarm Selection 1
0.5% Pre-Alarm 9
0.4% Pre-Alarm 8
0.3% Pre-Alarm 7
0.2% Pre-Alarm 6
0.1% Pre-Alarm 5
0.05% Pre-Alarm 4
0.03% Pre-Alarm 3
0.02% Pre-Alarm 2
Self Adjust 1
1.0%
1.1%
0.9%
0.8%
0.7%
0.6%
0.5%
0.4%
0.3%
0.2%
0.1%
SAMPLE
SENSITIVITY
WINDOW, laser detector
OBSCURATION (% PER FOOT)
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