Detection and locating, measuring equipment
Water leak detectors, cable and pipe locators

In the period of July the 2nd and the 3rd Technoac held additional tests of OFC line tracing.

GOAL: Reach maximum tracing distance for OFC cable line by using Technoac instruments.

INSTRUMENTS: Transmitter ag-105 receiver AP-019.3. The receiver has the same sensitivity as AP-019.1, only difference is GPS module.

Testing was held on intercity underground OFC line between Kolomna and Ozery towns. The distance between two towns is 30 kilometers. Cable type: OKGM-01-4х12Е3-(7,0). Average depth: from 0.5 to 0.9 meters.


During testing we mostly used direct connection. Transmitter was connected to armor of the cable. The insulation of the cable was preliminary cleaned out.

OFC line tracing field test report
OFC line tracing field test report
OFC line tracing field test report
OFC line tracing field test report

Testing was performed in two conditions:

  • traced cable was not grounded on the opposite side of transmitter connection. The connection schematics is given below:

OFC line tracing field test report

Test results:

Distance, m Transmitter AG-105 Receiver AP-019.3
frequency, Hz voltage, V current, mA resistance, ohm power, W depth, m current, mA
1000 512 32 120 270 38 0,8 130
2200 0,82 117
7700 0,5 93
8192 25 100 - 2,6 0,5 19,2
32768 34 110 - 3,6 0,5 1
20000 512 32 140 290 4,5 0,47 1
1024 data was not recorded 0,28 no indication
8192 data was not recorded 0,65 no indication

Maximum tracing distance was 20 000 m.

  • traced cable was grounded on the opposite side of transmitter connection. The connection schematics is given below:

OFC line tracing field test report

Test results:

Distance, m Transmitter AG-105 Receiver AP-019.3
frequency, Hz voltage, V current, mA resistance, ohm power, W depth, m current, mA
20000 512 - 120 - - 0,48 52
1024 22 200 120 4,3 0,46 68
8192 9,4 110 85 1 0,47 2
32768 15 100 150 1,5 no indication
29000 512 data was not recorded 0,84 15
1024 22 190 120 4,3 0,85 20
8192 8,7 100 87 0,87 0,84 no indication

Maximum tracing distance was 29 000 m.

Here is the map of located section of OFC line.

OFC line tracing field test report

Conclusion

  • Cable locating equipment from Technoac successfully passed the test in given conditions. The tracing distance and accuracy was really good.
  • The testing was performed with the same set as was supplied to Airtel, India. Without using any additional accessories.
  • On the end points of measurements, the signal level allowed to trace the line farther.
  • Performed testing is an additional works to previously made field evaluations.