Sensitivity Adjustment - CARLO GAVAZZI LDD1 Manual De Instrucciones

When the Automatic Channel Mode is selected, the Loop Detector scans all four channels during the
first 10 seconds after start up. Based on this measurement the Loop Detector selects the channel which
is least exposed to disturbance from neighbouring loops and other electrical or magnetic sources of
noise. After automatic channel selection is completed, the power LED flashes white to indicate which
channel is selected e.g. three flashes shows channel three is selected.

8.2 Sensitivity adjustment

The adjustment of the sensitivity for each loop, is easily performed using the rotary switch on the front.
The sensitivity can be changed in 10 steps from 1 to 10, where 1 is the lowest sensitivity and 10 is the
highest. It is important to find the right compromise between selecting high enough sensitivity to safely
detect all types of vehicles, while keeping it low enough to avoid false detections. If the sensitivity is set
too high, the Loop Detector can make false detections e.g. from bicycles, safety shoes with steel toes
or vehicles passing next to the loop, not over it.
It is recommended to start sensitivity adjustment from step 5. This sensitivity is normally suitable for
detection of passenger cars, vans etc. but depending on loop installation and type of vehicles to be
detected, a different setting might be needed.
For applications where detection of high bed vehicles is needed, please also refer to section 8.3
Automatic Sensitivity Boost for a more detailed description.
CAUTION: It is important to carefully test the application before the system is put into operation.
Setting the sensitivity too high or too low, can lead to unexpected behaviour of the application.
Rev.00 - 03.2019 | LDD1/LDD2 Single and Dual Loop Detector | © 2019 | CARLO GAVAZZI Industri
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