Megger DLRO10HD Digital Low Resistance Ohmmeter, 10 A

Heavy-duty low resistance ohmmeter combines rugged construction with accuracy and ease of use. It features an internal rechargeable battery and can also operate from a mains supply, even if the battery is completely flat. Provides enhanced compliance and is capable of delivering 10 A into measurements up to 250 mΩ and 1 A into measurements up to 2.5 Ω.

Product #
DLRO10HD

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Features

  • Interchangeable test lead terminations
  • High or low output power selection for condition diagnosis
  • Rechargeable battery or line power supply, continuous operation, even with dead battery
  • 10 A for 60 seconds, less time waiting to cool
  • Protected to 600 V without blowing a fuse, test lead live voltage warning light
  • Heavy duty case: IP 65 lid closed, IP54 battery operation
  • Simple rotary switch selection of five test modes, including auto start on connection
  • Rugged case well suited to transportation with shoulder strap and lead set pouch
  • Removable lid facilitates easy test lead connection
  • Operational ingress protection is IP 54 (battery power only) ensuring protection from the elements
  • 7 Ah lead acid battery provides extended operation and can be charged whilst operating from line power
  • Rotary mode switch with bidirectional (current reversal with averaging cancels thermal EMFs), unidirectional, automatic, continuous and inductive modes
  • Large, clear LCD display with backlight and contrast adjustment
  • Auto power off function conserves battery

Applications

  • Railways
  • Aircraft
  • Resistance of components in industry

Test modes

Automatic unidirectional mode applies current in one direction only to speed up the measurement process.

However thermal EMF resulting from dissimilar metal bonds can cause lower accuracy. Test starts automatically when probes are connected.

Continuous mode allows repeated measurements to be made on the same sample. Simply connect the test leads and press the test button. The measurement is updated every three seconds until the circuit is broken.

Inductive mode is selected when measuring resistance on, for example, motors and generators. When measuring inductive loads it is necessary to wait for the voltage to stabilize as the inductive element is charged. Test leads are firmly connected to the device under test and the 'Test' button pressed. The instrument will pass the selected current through the sample continuously in one direction only and take repetitive readings that will gradually decrease to the true value as the voltage stabilizes. The operator decides when the result is stable and presses the 'Test' button to terminate the test.

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