DESCRIPTION:
The Megger TDR500/3 Handheld Time Domain Reflectometer from Megger Group Limited is a robust, singlechannel time domain reflectometer designed for efficient fault location, cable length measurement, and impedance discontinuity detection on metallic cable pairs. With a minimum resolution of 0.1 m and a maximum range up to approximately 5 km (dependent on cable type and selected velocity factor), the unit delivers precise distancetofault capability in communications, control, and data cabling environments.
Selectable output impedances (25, 50, 75, and 100 ohm) combined with a velocity factor range of 0.20–0.99 allow calibration to diverse cable types without external matching hardware, improving accuracy and reducing setup time. The TDR500/3 employs an ultrafast pulse with typical rise time of 2 ns, enhancing nearend event discrimination for opens, shorts, and mismatches within the first sections of the cable.
Field operation is supported by an intuitive interface with AUTO selection of gain and pulse width, a TRACE HOLD feature to freeze trace data for analysis, and a backlit monochrome graphics LCD (256 × 128) with adjustable contrast for clear visibility in varied lighting conditions. A usercontrolled cursor provides immediate distance readouts on selected faults.
Designed for rugged use, the TDR500/3 incorporates an IP54rated enclosure for protection against dust and splashes and runs on five AA (LR6) batteries, delivering up to approximately 14 hours of typical field operation from a single set. The builtin power blocking filter eliminates the need for external filtering devices on live telecom TNV3 or 150 V CAT IV circuits when paired with appropriate test leads.
Typical applications include fault zone location (open circuit, short circuit, and impedance change), continuity verification, installation commissioning, and infrastructure maintenance in utility, telecom, industrial and data network environments.
Key Features
-
Handheld singlechannel TDR for metallic cable fault location
-
Maximum measurable range up to ~5 km with 0.1 m minimum resolution
-
Selectable output impedance: 25, 50, 75, 100 ohm
-
Adjustable velocity factor 0.20–0.99 for accurate cable calibration
-
Ultrafast pulse (2 ns rise) for enhanced nearend detail
-
AUTO selection of gain and pulse width for rapid setup
-
TRACE HOLD function to freeze trace for analysis
-
Backlit graphics LCD (256 × 128) with adjustable contrast
-
IP54 fieldrugged enclosure
-
Powered by five AA (LR6) batteries (~14 h typical runtime)