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8.3 Automatic Sensitivity Boost (ASB)
Trucks, trailers and other high bed vehicles often require use of high sensitivity setting to avoid
deactivations when the bed of the vehicle is on top of the loop. For this reason the Loop Detector
has a special function called Automatic Sensitivity Boost (ASB). When this function is enabled the
deactivation level is lowered. This helps to prevent false deactivations (see figure below).
Signal level
Activation level
Deactivation level
(ASB OFF)
Deactivation level
(ASB ON)
Output with ASB OFF
Output with ASB ON
The sensitivity adjustment dial works in the same way with or without ASB function ON, by lowering or
increasing the activation threshold. However by utilizing the ASB function it is possible to have correct
detection of high bed vehicles for lower sensitivity settings.
Note: It is generally recommended to only use the ASB function for applications where high bed
vehicles needs to be detected. For detection of passenger cars, vans etc. best detection is usually
achieved with ASB OFF.
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Rev.00 - 03.2019 | LDD1/LDD2 Single and Dual Loop Detector | © 2019 | CARLO GAVAZZI Industri
Loop
ON
ON
Time
ON
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