TDR locates faults on mixed paired metallic cables

Test equipment expert Megger now offers a handheld time domain reflectometer (TDR) that locates faults on mixed paired metallic cables. Geared for telecommunications technicians, electrical service contractors, and cable television companies, the new handheld tester works on all metallic pairs including twisted-pair copper, as well as concentric and coax cables.

The CFL535G can test the capabilities of connections and locate faults for up to 12 miles (20 km). The high resolution, compact TDR features dual channel capability and a dual aspect display. Megger’s CFL535G also allows technicians to compare cable pairs to each other and determine if one is faulty, based on differences shown on the TDR. The CFL535G establishes a benchmark for future comparison, measures cable length, locates and evaluates splices and joints, and detects cable taps.

Further, the CFL535G features an ultra-fast 2 ns pulse width that nearly eliminates dead zones and provides a real time trace for tested cables giving quick and accurate results. It also offers two inputs that enable simultaneous measurements of two different cables. An auto set-up mode for instant use is incorporated into the TDR. This feature helps determine the impedance of the cable under test, sets the instrument accordingly, and selects the optimum gain and pulse width chosen by the operator.

The CFL535G also features Megger’s Xpert mode, which allows for rapid identification of faults by simply pressing the unit's Xpert key. The tester then automatically adjusts the range and gain, while positioning the cursor to the first major fault on the cable. By pressing the Xpert key a second time, the TDR then moves to the next detected disturbance.

The tool's trace hold and overlay feature is used for comparison between cables for both live and saved traces. A large, color, high-resolution, fully adjustable backlit display comes standard on the CFL535G, making it easy to analyze the traces and accurately position the cursor. The unit also features ‘bed of nails’ test leads. These reliable contact leads allow for quick and simultaneous contact with hundreds of individual test points within the circuitry of a DUT, says Megger

The CFL535G features five output impedances: 25 Ohm, 50 Ohm, 75 Ohm, 100 Ohm and 120 Ohm, and a velocity factor between 0.2 and 0.99 in steps of 0.01. The rugged, IP54-rated TDR is powered by a long life (12 hour real world usage), rechargeable Li-Ion battery.

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