Et system MD2010 - Troubleshooting Loop Faults and Indicator Signals; Faulty Loop Diagnosis (Below 20 kHz); Faulty Loop Diagnosis (Above 120 kHz); Good Loop Indication

MD2010
METAL LOOP DETECTOR
 Faulty loop – Open loop or loop frequency below 20Khz:
 Fault LED - 3 flashes, 3 sec pause, 3 flashes, 3 sec pause.........this continues until the faulty loop is
corrected and the detector is reset.
 Buzzer - 3 beeps, 3 sec pause, 3 beeps, 3 sec pause.......repeats five times and then silences.
■ If the loop circuit is continuous (measure with continuity meter) then increase the loop
frequency by adding more turns of wire.
 Faulty loop – Short circuited or loop frequency above 120Khz:
 Fault LED – 6 flashes, 3 sec pause, 6 flashes, 3 sec pause - ..........this continues until the faulty loop is
corrected and the detector is reset.
 Buzzer – 6 Beeps, 3 sec pause, 6 beeps, 3 sec pause..........repeats 5 times and then silences.
■ If there is no short circuit in the loop circuit then reduce the number wire turns around the
loop to reduce the loop frequency.
 Good loop:
 All three the Detect LED, Fault LED and the buzzer will beep/flash (count) between 2 and 11
times to indicate the loop frequency.
■ 1 Count = 10Khz
For example; 3 counts x 10Khz = Loop frequency of 30 – 40 KHz.
Buzzer and LED indications after initial power up/reset:
1 sec flashes 1 sec apart No vehicle (metal) detected in loop area.
On permanently Vehicle (metal) detected in loop area.
3 flashes 3 sec apart
Loop w ire is open circuit. Use Dip-sw itch 9 after
any corection is made
6 flashes 3 sec apart
Loop w ire is short circuited. Use Dip-sw itch 9 after
any corection is made
Tone as long as vehicle
is in loop area
Buzzer sounds to confirm the first ten detections
Continuous tone w ith no
vehicle in the loop area
Loose w iring in loop or pow er terminals.
Use Dip-sw itch 9 after any correction is made.
Detect LED -
Fault LED -
Buzzer -
0860-109-238
support@et.co.za