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FLUX OB diagnostics
The sense level LEDs
flash erratically
The detector
randomly detects,
even though there is
no vehicle present
The Loop Fault LED is
flashing
The Loop Fault LED is
permanently
illuminated
There may be a poor
connection in the loop or
loop feeder
The detector may be
experiencing crosstalk with
the loop of an adjacent
detector
Faulty loop or loop feeder
wiring
Movement of the loop in the
ground
The loop inductance is too
large, or the loop is open
circuit
The loop inductance is too
small, or the loop is short
circuited
Check all wiring. Tighten screw
terminals. Check for broken wires
Try changing frequencies using the
frequency switch. Put the detector
with the larger loop onto low
frequency and the detector with
the smaller loop onto high
frequency
Check the wiring. Tighten screw
terminals. Check for pinched or
bent wires. Is the feeder wire
twisted?
Check for cracks in the road
surface near the loop
Check that there is electrical
continuity on the loop. If the
inductance is too large then try
reducing the number of turns
Check that there is no short circuit
on the loop feeder wiring of the
loop. If there is no short circuit
then the inductance is too small
and more turns of wire should be
added to the loop
Symptom
Possible cause
Solution
Detect indicator LED
!
This green LED indicator is illuminated when there is a vehicle detected. This LED can
also be used to determine the loop frequency. Reset or power up, count the number of
times the Detect LED flashes. Multiply this number by 10KHz. For example: if the LED
flashes eight times, then the loop frequency is approximately 80KHz
Commissioning the FLUX OB
1.
With the loop connected, apply power to the
SECTOR
controller.
2.
The green Power LED on the termination board will light up, and the green Detect
LED will flash until the loop has stabilised, and then turn off.
3.
Once the loop has stabilised, only the green power LED should be on.
4.
Bring a metal object towards the loop, and the Sense level LEDs will begin to light
up, indicating the detection range of the loop.
5.
Once all five lights have lit up, the unit will enter detect, with the green detect
LED lit.
6.
Configure the desired operational settings using the dipswitches.
7.
Test the FLUX OB using a metallic object, or a vehicle.
