Cable Locator for Buried Cable Path Identification, Depth Detection and Cable Fault Location with 15km Tracing Range | XHGX507

The XHGX507 is a pathfinder cable locator that identifies which buried line is the target, traces its route, measures its depth and locates its fault from the surface — all with one lightweight, all-digital set. Working on the principle of electromagnetic induction, the transmitter applies a signal to the line and the receiver reads the signal strength, the current and the depth above it, so a single operator can follow a buried cable or pipeline without opening the ground.

A large-screen LCD with a ladder display, arrow guidance and FM sound prompts keeps the reading clear, and a backlight makes night work practical. A built-in ohmmeter checks whether the loop is good enough to track, and a current test tells the target line apart from the parallel lines around it. Because it needs no high-voltage equipment, no AC power and no waveform analysis, wiring is simple and the instrument is easy to learn — the cable path of a charged or uncharged line and its ground insulation fault can both be found by one person.

The transmitter works at low frequency (LF) and radio frequency (RF); the two suit very different site conditions. There is no fixed rule — the frequency that suits the site is the most suitable — and the guide below covers the basic choices.

Keep the output power at the minimum the receiver needs. Blindly raising the power makes the signal more sensitive to neighbouring pipelines, which makes the target cable harder to identify and wastes transmitter power.

Two signal classes: an active signal is produced by the transmitter and applied to the target line, while a passive signal is the line's own 50Hz signal — which is why an underground line can still be located for a pre-excavation census without the transmitter.

The receiver measures cable depth in three ways so the operator can choose by site condition: the direct-reading method (receiver directly above the cable, press the depth key), the 45-degree method (nudge the receiver to 45 degrees and move away until the signal reads zero; that distance equals the depth) and the 80% method (find the two points where the peak reading falls to 80%; the distance between them equals the depth). In an ideal environment the depth accuracy is about ±5%.

For buried cable ground faults, the XHGX507 uses the step voltage method: the transmitter injects current that leaks to earth at the fault, producing a step voltage, and the letter "A" frame reads the potential difference along the path. When the "A" frame is directly above the fault the difference between its two probes is near zero, which marks the fault point. An electromagnetic test with the peak method can also spot an open-circuit fault quickly, by watching for a sudden jump or rapid disappearance of the signal.