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Uni-directional Free-exit switch
!
The switch is used to select between uni- and bi-directional traffic. If the switch is in
the ON position, the loop detector will generate a “raise” pulse whenever a vehicle is
detected on the Free-exit loop. If, however, the switch is in the OFF position, a raise
pulse will only be generated if a detect signal is received from the Free-exit loop only,
and never when a signal is received from the Free-exit loop and the closing loop
simultaneously (bi-directional traffic)
It is very important that the distance between the free-exit loop and the closing
loop is less than the length of one car
Automatic Sensitivity Boost (ASB) switch
!
This option increases the sensitivity of the detector after initial detection of a vehicle.
This is useful to reliably detect vehicle and trailer combinations. Sensitivity returns to
the selected value once the vehicle has been undetected
Permanent presence switch
!
If this switch is set to the ON position, detection will be maintained as long as a vehicle
remains on the loop. The danger in using this setting is that any change in the
environment (for example the introduction of metal into the vicinity of the loop) will not
automatically be tuned out without pressing the reset button. If not selected, the loop
will automatically tune out any permanent detection after five minutes
Adjustable loop sensitivity settings
&
Eight sensitivity settings are available
Sensitivity
SENS1
SENS2
SENS3
High (0.03%)
ON
ON
ON
0.06%
ON
ON
OFF
0.1%
ON
OFF
ON
0.2%
ON
OFF
OFF
0.5%
OFF
ON
ON
1%
OFF
ON
OFF
2%
OFF
OFF
ON
Low (4%)
OFF
OFF
OFF
Power indicator LED
!
This red LED is on when power is present, and the controller is functioning
Loop fault indicator LED
!
This red LED is illuminated when there is a loop fault. If the loop is open circuit, the
Fault LED will flash continuously. If the loop is short circuit, it will remain on
Detection level indicator LEDs
!
These five RED LEDs provide a visual indication of the Detection Level. Once all five
LEDs are on, the detection threshold is almost reached. This is a very useful feature to
determine if the loop is going to perform reliably. With no vehicle in the vicinity, all the
LEDs should be off
