Specifications of the Megger DLRO200-115 Digital Low Resistance Ohmmeter

Megger DLRO200-115 200A Digital Low Resistance OhmmeterThe Megger DLRO200-115 Digital Low Resistance Ohmmeter (DLRO) checks and measures contact resistance in high voltage circuit breakers, disconnecting switches (isolators) or busbar joints.

Megger DLRO200-115 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

Current Lead Resistance (Megger supplied leads)

2 x 16 ft (5 m) 25 mm2 current leads 8 mΩ

2 x 16 ft (5 m) 50 mm2 current leads 4 mΩ

2 x 33 ft (10 m) 70 mm2 current leads 5.4 mΩ

2 x 49 ft (15 m) 95 mm2 current leads 6 mΩ

Maximum Continuous Test Time

More than 10 minutes at 200 A @ 68° F (20º C) ambient.

Power Supply for full output (additional smoothed): 100 to 130 V 50/60 HZ with a load less than 11 mΩ including current leads

Test Modes: Manual, Auto, Continuous.

Test Time: 10 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: 160 characters max.

Test Current

Range: Filtered direct current; 10 A to 200 A d.c.

Accuracy: ±2% ±2 A

Voltmeter input

Impedance: >200 kΩ

Hum rejection: 5 V rms 50 Hz/60 Hz


Operation: 14 to +122º F (-10 to +50º C)

Storage: -13 to 149º F (-25 to +65º C)

Calibration: 68° F (20º C)

Co-efficient: <0.05% per º C

Max. Humidity: 95% RH non-condensing

Maxi Altitude: 6562 ft. (2000 m)

Safety: IEC61010 – (1995)

EMC: EN61326 annex A (heavy industrial)

Dimensions: 16.4 x 9.84 x 10.63 in.(410 x 250 x 270 mm)

Weight: 31.97 lbs. (14.5 kg) excluding test leads

Related electrical test equipment available for rent from Protec:

Megger DLRO10HD 10A Digital Low Resistance Ohmmeter

AEMC 6250 10A Micro-Ohmmeter

Vanguard Auto-Ohm 200 S3 200A Micro-Ohmmeter

Raytech Micro Centurion II MC2 200A Precision Micro Ohm Meter

This electrical test equipment is available for rent, lease, or purchase from Protec Equipment Resources. We are here to help you with your testing equipment needs.

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