Version: 20210708
25
As a guideline:
•
For stable environments with little disturbances, the sensitivity can be increased for a higher probability of
smoke detection.
•
For very dynamic scenery or outdoor application, the sensitivity may be decreased to avoid excessive
triggering of alarms by smoke-like phenomena.
Smoke alarm delay
Range = 2 - 150 seconds
Default value = 5 seconds
To avoid erroneous triggering of smoke alarms due to short disturbances or transitional events in the scenery, an
alarm will only be triggered after it has been identified for a certain amount of time at a certain location in the field of
view. This is called the alarm delay.
CONFIGURING FLAME DETECTION SENSITIVITY
Notice: changing detection settings may affect detection performance. Only change from default settings if
needed.
Enabled
Range = on / off
Default = on
Enables or disables the flame algorithm
The detection sensitivity of the flame detection algorithm can be changed by means of two parameters:
Sensitivity level
Range = 1
–
5
Default value = 3
The sensitivity level determines how easily a flame alarm is triggered. The higher the value, the more sensitive the
detection becomes. Lower values may be used to avoid erroneous triggering of alarms but can also lead to non-
detection of real events. Higher values may be used to facilitate detection of alarms but can also lead to excessive
false alarms.
As a guideline:
•
For stable environments with little disturbances, the sensitivity can be increased for a higher probability of
flame detection.
•
For very dynamic scenery or outdoor application, the sensitivity may be decreased to avoid excessive
triggering of alarms by flame-like phenomena.
Flame alarm delay
Range = 5 - 120 seconds
Default value = 20 seconds
To avoid erroneous triggering of fire alarms due to short disturbances or transitional events in the scenery, an alarm
will only be triggered after it has been identified for a certain amount of time at a certain location in the field of view.
This is called
“
alarm delay
”
.
