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4.3 Object Detection Alert
The user is alerted to object detection from the sensor network via coloured indicators located
on the screen and by an audible alert (through both the monitor’s speaker and any external
alarm connected to the Ext-Alarm Trigger). The colour of the indicators and the pulse rate of
the audible alert are linked to each other and vary within 5 different zones according to the
distance between the sensor(s) and the detected object. When 2 sensors are used in a
system, the audible alert function (including monitor’s speaker and any external alarm
connected to the Ext-Alarm Trigger) is shared across both. Therefore, the sensor detecting an
object in the closest zone will take precedence of the audible alert function.
Trigger output(s) may also be activated during object detection, depending on system
configuration. The images below illustrate the typical alerting characteristics of a 2-sensor
system
4.4 System Commissioning
Whilst the Backsense
®
BS-9000 sensor is capable of detecting multiple objects
simultaneously, the machine operator will be alerted to the closest object to the sensor only,
(excluding those falling into pre-configured blind zones).