Specifications for the Megger DLRO 600 Digital Micro-Ohmmeter

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Megger-DLRO600The Megger DLRO 600 Digital Micro-Ohmmeter is a versatile instrument capable of providing test currents from 10 amps up to 600 amps subject to the load resistance and supply voltage. A large liquid crystal display provides all the information needed to perform a test​; all test parameters and measurement results are displayed.

Megger DLRO 600 Digital Micro-Ohmmeter specifications:


Range: 0.1 µΩ to 999.9 mΩ

(Subject to supply voltage and leads used)


Voltage ±0.5% ± 0.1 mV

Current ±0.5% ± 0.1 A

Resistance: Better than 1% from 100 µΩ to 100 mΩ

Output Current:

The chart above shows the maximum output current available at different supply voltages with a 4 mΩ load (i.e. standard 5 m current leads only) and with a 7 mΩ load

Current Lead Resistance (Megger supplied leads)

2 x 5 m 50 mm2 current leads 4 mΩ

2 x 10 m 70 mm2 current leads 5.4 mΩ

2 x 15 m 95 mm2 current leads 6 mΩ

Maximum Continuous Test Time: More than 60 seconds at 600 A @ 20ºC ambient.

Power Supply for: See chart.

Full Output: 207 to 265 V 50/60 Hz with a load less than 7 mΩ including current leads

Reduced Output: Down to 100 V 50/60 Hz.

Test Modes: Manual, Auto, Continuous.

Test Time: 7 seconds NORMAL /AUTO mode. Refreshed every 2 seconds in CONTINUOUS  mode

Display: Large, high resolution backlit liquid crystal display

Warnings: Current flowing: – LED. Other warnings are shown on the lcd display.

Data Transfer: Real time or batch download via RS232 using Download Manager.

Storage Capacity: 300 result sets and memo, battery backed for 10 years.

Memo Field: 200 characters max.

Test Current Range: 10 A to 600 A unsmoothed d.c. in 1 A steps

Accuracy: ±2% ±2 A

Voltmeter Input Impedance: >200 kΩ

Hum Rejection: 5 V rms 50 Hz/60 Hz

Temperature Operation: -10 to +50ºC

Storage: -25 to +65ºC

Calibration: 20οC

Co-efficient: <0.05% per ºC

Max. Humidity: 95% RH non-condensing

Maxi Altitude: 2000 m

Safety: IEC61010-1

EMC: IEC61326-1

Dimensions: 410 x 250 x 270 mm

Weight: 14.5 kg (excluding test leads)

Megger is one brand you can count on, and Protec offers for rent, lease or purchase, all the electrical testing equipment you need to get the job done. 

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