Digiphone Touch 5 XHDD503E Cable Fault Pinpointer
The Digiphone Touch 5 XHDD503E uses vibration pickup and electromagnetic induction principles to determine the precise location of cable fault points. A high-voltage pulse generator causes flashover discharge at the fault point, and the resulting vibration waves, sound waves, and electromagnetic waves are detected by a specialized probe. The instrument amplifies, processes, displays and outputs these signals for the operator to make an accurate auditory and visual assessment — completing precise fault location directly above the cable.
Suitable for low-resistance, short-circuit, open-circuit, and disconnection faults of power cables, high-frequency coaxial cables, street light cables, and buried wires across various materials, cross-sections, and media, as well as high-resistance leakage and flashover faults.
Flagship Features
Detection Modes: 4 (AMS / Pure Acoustic / Pure Magnetic / A-Frame) | Accuracy: ≤0.1m | Test Modes: 4 (Standard / Enhanced / Noise Reduction / Custom) | BNR: Yes
1.5-inch touch high-brightness LCD ensures clear visibility under direct sunlight.
2.4 positioning functions: acoustic-magnetic synchronization, pure acoustic, pure magnetic, and A-frame step voltage detection.
3.4 selectable test modes: Standard, Enhanced, Noise Reduction, and Customized.
4.BNR background noise reduction technology with multiple filtering options and mute function.
5.Path deviation indication for guided cable routing and fault location.
6.Multi-layer physical isolation signal sensor with IP65 waterproof protection.
7.Built-in large-capacity lithium battery with 8+ hours standby and included fast charger.
8.Compact and lightweight design with intuitive human-machine interface.
| Parameter |
Specification |
| Filter: All-pass |
100Hz ~ 1600Hz |
| Filter: Low-pass |
100Hz ~ 300Hz |
| Filter: High-pass |
160Hz ~ 1600Hz |
| Filter: Band-pass |
200Hz ~ 600Hz |
| Acoustic/Magnetic/Step Voltage Gain |
8 levels adjustable each |
| Output Gain |
16 levels (0 ~ 112dB) |
| Output Impedance |
350Ω |
| Acoustic-Magnetic Positioning Accuracy |
≤0.1m |
| Step Voltage Positioning Accuracy |
≤0.5m |
| Path Identification Accuracy |
≤0.5m |
| BNR Noise Reduction |
Yes (background noise reduction + mute) |
| Display |
5-inch high-brightness touch LCD |
| Power Supply |
4 x 18650 standard lithium batteries |
| Standby Time |
More than 8 hours |
| Ambient Temperature |
-25 ~ 65°C; Humidity: ≤90% |
1. Acoustic-Magnetic Synchronization (AMS)
The most accurate method combining acoustic and electromagnetic detection. When high-voltage discharge occurs at the fault point, the acoustic signal is picked up by the probe while the electromagnetic signal propagates near-instantaneously. The time difference between the two signals determines the exact distance to the fault. Move the sensor to find the point with the smallest time difference — the fault is directly below.
2. Pure Acoustic Method
Designed for high-resistance and flashover faults. The acoustic vibration sensor converts sound into electrical signals, which are amplified and filtered. The point with the greatest sound intensity is identified as the fault point through headphone monitoring or visual intensity display.
3. Pure Magnetic Method
Determines cable path and fault location. Uses an induction coil to pick up pulse signals from high-voltage discharge. Deviation from the cable path is identified by changes in the pulse signal characteristics, indicating the fault point.
4. A-Frame Step Voltage Method
For ground faults in buried cables. A test voltage is applied between the cable and ground, creating a distributed electric field. The A-frame measures potential differences between two points — the potential difference decreases to zero directly above the fault point and reverses polarity beyond it, allowing precise ground fault location.
| Component |
Description |
| Cable Fault Locator (Main Unit) |
5-inch touch LCD with full controls |
| Probe |
Including sensor, probe tip, three claws and connecting rod |
| Headphones |
For acoustic signal monitoring |
| 7-Core Signal Cable |
Connection between main unit and probe |
| A-Frame |
For step voltage method testing |
| A-Frame Connection Cable |
Connection between main unit and A-frame |
| Ground Pin |
A-frame accessory |
| Charger |
Fast charger for lithium batteries |
After-Sales: 12-month warranty, lifetime technical support and maintenance.
On-site Photos
Frequently Asked Questions
Q: What do AMS, BNR and A-Frame detection modes each do?
AMS (Acoustic-Magnetic Synchronization) combines acoustic and electromagnetic signals for precise pinpointing of flashover faults. BNR (Background Noise Reduction) filters ambient noise in urban or industrial environments. A-Frame step voltage detection locates sheath/insulation faults on directly-buried cables by measuring ground potential gradients. Together they cover the full spectrum of cable fault pinpointing scenarios.
Q: How accurate is the pinpointing and what depth can it detect?
Acoustic-magnetic synchronization achieves 0.1m precision, reducing the excavation zone to approximately 30cm diameter. Detection depth depends on soil conditions and fault discharge energy, typically reaching 5-8m for standard flashover faults. The separate acoustic and magnetic channels provide cross-verification, ensuring you dig once in the right location.
Q: What does the touch screen interface add to field operations?
The sunlight-readable touch screen provides clear visual feedback of acoustic waveforms and magnetic field strength, enabling pattern recognition during fault pinpointing. Operators can visually confirm the discharge rhythm matches the audible signal, reducing false positives. The digital interface also stores test parameters for report documentation.
Q: How does the system perform in noisy urban environments?
BNR technology digitally filters background noise from traffic, construction and industrial equipment. The magnetic channel provides a secondary confirmation signal unaffected by acoustic noise. For extreme noise conditions, the IP65-rated headphones with active noise isolation allow operators to focus on faint fault discharge sounds that would otherwise be masked by ambient noise.
Q: What battery life can I expect in the field?
The XHDD503E provides 8+ hours of continuous operation on a full charge, sufficient for a full field shift. Fast charging replenishes the battery during lunch breaks or transit between sites. The IP65-rated sealed battery compartment protects against moisture ingress during extended outdoor use in wet conditions.
Q: What warranty and support is included?
12-month standard warranty covering manufacturing defects, with lifetime technical support. CE and ISO certified. Each unit includes a user manual, headphones, carrying case, and charger. Optional on-site training and extended warranty plans available. Technical inquiries typically answered within 24 hours.
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