Product Introduction
The XHDD503C Cable Fault Pinpointer is a precision acoustic-magnetic synchronization instrument designed to accurately locate underground power cable faults within the rough measurement range. It picks up and amplifies the discharge sound and electromagnetic signals generated by a high-voltage impulse generator at the fault point, then calculates the acoustic-magnetic time difference to guide operators to the exact fault location with an accuracy of less than 0.1m.
Unlike traditional acoustic-only pinpointers that rely solely on operator experience and hearing, the XHDD503C simultaneously captures both acoustic and magnetic field signals, visually displays their time difference on a 5-inch touch LCD, and uses BNR digital noise reduction to filter out ambient interference — enabling even less experienced technicians to locate faults quickly and reliably in field conditions.
Key Features
Acoustic-Magnetic Synchronization: Automatically calculates the time difference between electromagnetic and acoustic signals. The smaller the time difference, the closer you are to the fault point — displayed in real time on screen.
0.1m Pinpoint Accuracy: Positioning accuracy less than 0.1m; path identification accuracy less than 0.5m. Meets DL/T 849.2-2019 and GB/T 18268.1 standards for industrial field test equipment.
5-inch Sunlight-Readable Touch LCD (800nit): 854×480 resolution capacitive touch screen remains clearly visible under direct outdoor sunlight. Intuitive touch interface with one-knob alternative operation.
BNR Digital Noise Reduction: Built-in Background Noise Reduction technology with mute mode. When the operator holds the handle, the host activates mute instantly to prevent noise damage during prolonged use.
4 Filter Modes: All-pass (100–1600Hz), Low-pass (100–300Hz), High-pass (160–1600Hz), and Band-pass (200–600Hz). Adapt to different soil conditions — from hard pavement to soft sand — for optimal signal clarity.
IP65 Waterproof Probe: Multi-layer physical isolation sensor rated IP65. Works reliably in wet trenches, rainy conditions, and dusty construction environments.
Path Deviation Indication: Real-time left/right path guidance on screen. The instrument shows whether the probe is to the left or right of the cable path, helping operators quickly correct their walking route.
500,000× Signal Gain Amplification: 16-level output gain (0–112dB) effectively captures weak acoustic and magnetic discharge signals from deeply buried or high-impedance faults.
8+ Hour Battery Life: Powered by 4×18650 high-capacity lithium batteries with dedicated fast charger. All-day outdoor operation on a single charge.
Complete Field Kit: Includes pinpointer host, probe with connecting rod and tripod base, 7-core signal cable, noise-canceling monitoring headset, fast charger, multifunctional wrench, and portable shockproof storage case.
Technical Specifications
| Acoustic-Magnetic Pinpointer |
| Positioning Accuracy |
<0.1m (acoustic-magnetic synchronization) |
| Path Identification Accuracy |
<0.5m |
| Display |
5-inch capacitive touch LCD, 854×480 pixels, 800nit brightness |
| Operation |
Touch screen + one-knob control |
| Filter Modes |
All-pass: 100–1600Hz; Low-pass: 100–300Hz; High-pass: 160–1600Hz; Band-pass: 200–600Hz |
| Channel Gain |
8 levels adjustable (acoustic + magnetic independent) |
| Output Gain |
16 levels (0–112dB) |
| Output Impedance |
350Ω |
| Signal Gain Amplification |
Up to 500,000× |
| Noise Reduction |
BNR digital noise reduction + mute mode |
| Probe Rating |
IP65 waterproof, multi-layer physical isolation |
| Power Supply |
4×18650 standard lithium batteries; >8 hours continuous operation |
| Operating Temperature |
-25℃ to +65℃; Relative humidity ≤90% |
| Compliance |
DL/T 849.2-2019; GB/T 18268.1; CE; ISO |
Working Principle
The XHDD503C employs the acoustic-magnetic synchronization method — a significant advancement over traditional acoustic-only pinpointing. When a high-voltage impulse generator discharges at the fault point, two signals are generated simultaneously: an acoustic signal (the "pop" sound traveling through soil) and an electromagnetic signal (traveling near-instantaneously through the cable). The instrument's probe captures both signals in real time. Because electromagnetic propagation is vastly faster than sound, the time gap between the two signals directly correlates to the distance from the fault. By continuously monitoring this time difference and moving the probe to where it reaches minimum, the operator pinpoints the exact fault location.
Traditional methods rely entirely on the operator's ear to distinguish the brief discharge sound from ambient noise — a skill requiring years of experience. The XHDD503C eliminates this dependency by providing visual waveform display, time-difference readout, and path deviation guidance, making fault pinpointing reliable even for operators with limited field experience.
Applications
| Power Utility Companies |
Pinpointing faults on underground MV/HV power distribution and transmission cables |
| Telecom Network Maintenance |
Locating faults on copper trunk and local loop cables; high-frequency coaxial cable diagnostics |
| Municipal Street Lighting |
Fault location on buried street light and traffic signal cables |
| Industrial Plants |
In-plant underground cable fault diagnosis for manufacturing and processing facilities |
| Railway & Metro Systems |
Signal and power cable fault pinpointing along rail corridors |
Included Accessories
XHDD503C Cable Fault Pinpointer host
Probe with connecting rod and tripod base
7-core signal cable
Noise-canceling monitoring headset
Fast charger (AC 220V)
Multifunctional wrench
Portable shockproof carrying case
After-Sales & Warranty
12-month free warranty against product quality issues from date of purchase. Lifetime maintenance and technical support. CE and ISO certified. Contact us for technical consultation or customized configuration requirements.
Contact us today for a quotation or technical consultation on the XHDD503C Cable Fault Pinpointer.
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