Version: 20210708
10
ENVIRONMENT REQUIREMENTS
The sensitivity and performance of the Araani Fire Guard system are impacted partially by the environment it is
operating in. Consider these basic guidelines with each installation for optimal performance:
Light:
For smoke recognition, there should be sufficient light 24/7 in the complete field of view.
As a general guideline, smoke recognition requires light from 5 lux onwards, depending on the exact camera model.
However, the minimal required light level is dependent on the exact camera type.
Flame recognition does not require light = 0 lux. It works in complete dark environment.
Notice:
Using (built-in) infrared illumination is possible but will disable the flame detection as for flame
detection a colour image is required.
Dark / bright spots:
Avoid combination of very dark and extreme bright spots in the field of view. This will stress the dynamic range of
the camera and make the image quality unstable, resulting in an overall darker image.
For indoor cameras:
•
Do not point the camera to exterior windows, and portals.
•
Avoid the presence of direct light sources in the field of view. If this cannot be avoided, adjust the
For outdoor cameras:
•
Avoid east or west orientation, where the sun gets low and potentially may blind the camera.
•
Avoid having horizon in the field of view of the camera at all.
Contrast:
There should be sufficient contrast in the field of view. Do not point the camera to white walls or large areas without
contrast.
Sun:
Avoid direct sunlight or bright reflections of the sun falling straight into the lens.
False triggers:
Avoid sources of dust, damp, or smoke (e.g., from operating machines) in the field of view during normal operation.
These could lead to recurring false detections.
Outdoor:
Outdoor conditions are more susceptible to false alarms. For outdoor applications, try to control and stabilize
environmental conditions as much as possible e.g., protecting the scene from varying weather conditions, apply
stable lighting conditions, etc.
To further optimize the detection or to avoid false triggering of alarms e.g., due to very dynamic or badly illuminated
zones in the field of view, the detection can be restricted to certain zones in the field of view. These zones can be
drawn in the app configuration screen in the browser itself, see section
By default, the detection area is the whole field of view. If detection zones are defined, this will override the default
and detection will only occur only in the defined zones.
Adjust the sensitivity parameters of Araani Fire Guard if problems persist.
