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Megger TDR500/3

Ex VAT: £495.00
RRP: £594.00
VAT: £99.00
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The TDR500/3 is a hand held, compact Time Domain Reflectometer for locating faults on metallic cables. It has a minimum resolution of 0.1 m/0.3 ft and a 5 km/15 kft maximum range depending on velocity factor selected and cable type.

Four output impedances are available (25, 50, 75, and 100 Ω) and a velocity factor between 0.2 and 0.99 will meet any cable test requirements

The TDR500/3 has a simple selection option which together with a 4 way control switch offers an intuitive operation for the user.


Measuring Functions

  • Ranges: 10m,25m,100m,250m,1000m,2500m,5000m (30ft,75ft,300ft,750ft,3000ft,7500ft,15000ft);
  • Accuracy: +/-1% of range +/- pixel at 0.67VF. (NB. The measurement accuracy is for the indicated cursor position only and is conditional on the velocity factor being correct);
  • Resolution: 1% of range;
  • Input protection: This device complies with IEC61010-1 for connection to live systems up to 150V CAT IV when used with the optional fused lead set.
  • Output pulse: 5 volts peak to peak in open circuit. Pulse widths determined by range and cable;
  • Gain: Set for each range with three user selectable steps (in manual operating mode);
  • Velocity factor: Variable from 0.2 to 0.99 in increments of 0.01;
  • TX null: Automatic.




Other features

An AUTO selection option ensures that the most effective parameters are selected depending on the range required, aiding rapid diagnosis of the TDR trace. A clear operator controlled cursor allows instant measurement of the distance to the fault.

A trace HOLD feature also allows the operator to hold a trace on the screen, something not seen on most other handheld TDRs. Extra high resolution together with whitelight backlight and grey scale tones give the graphical display a vibrancy, aiding the user in identifying key events on the trace.


  • Backit graphics monochrome LCD display (256 x 128);
  • Resolution to 0.1m;
  • Utilise on Telecom TNV-3 or 150V CAT IV power circuits;
  • Power blocking filter not required;
  • IP54 protection;
  • 2ns pulse for near end fault location;
  • AUTO option selecting gain and pulse for each range;
  • Auto power down after 5 minutes with no key press required;
  • Battery life up to 14 hours (typical);
  • Uses five AA primary cells.



Package Contents

  • TDR500/3 Time Domain Reflectrometer;
  • Hard carry case;
  • Miniature clip test lead set;
  • CD user guide.



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Technical data

Dimensions (w x h x l): 115 x 230 x 48 mm

Mass (without accessories): 600 g


Download files

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Note! Subject to technical change without notice.

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