Important Fault Locating Information
|1. The length of the buried cable has
little to do with locating the fault. Faults have been located in buried
low voltage cable feeding irrigation systems ranging in length exceeding
2. The depth of the cable has little to do with locating the fault. Faults have been located in buried low voltage cables 6 feet and deeper.
3. In sandy soil or when the soil is very dry, once you move away from the transmitter location, the signal may drop off quickly, requiring you to increase the sensitivity. In fact, you may lose the signal completely. If you lose the signal, continue to probe the earth moving toward your destination point. As you begin to approach the fault location, the signal will increase requiring you to reduce the sensitivity to pinpoint the fault.
4. Always be positive the cable being fault located is actually faulted. You can use the SPITFIRE to check the other cables to reveal faults. The adjacent cables can very well be damaged from the leakage current from the known faulted cable.
5. Always check the entire cable route for multiple faults. The SPITFIRE will reveal multiple faults on cable routes which can reveal a cable circuit that may need replacement instead of repair.
6. Cables damaged during installation usually will fail within a year, based on power usage and soil wetness. After a cable has been energized a year or more before failure, the probable cause of failure is mechanical damage. Ask about new construction, shrub planting, etc. Before beginning to fault locate.
7. If you become confused by the detector indications you are seeing, draw the circuit out to try to figure out why you are getting the signals you're getting. The detector can only indicate which ground probe is experiencing the most energy input. Check the sensitivity and use as low a setting as you can to get a good indication. Too much sensitivity can flood the detector circuit causing erroneous indications. The operator is in control of the sensitivity and the interpretation of the indications.
8. When the SPITFIRE transmitter is turned "OFF", wait at least 5 seconds to allow the stored energy in the capacitors to dissipate.