Megger DLRO200-115 Digital Low Resistance Ohmmeter

The Megger DLRO200-115 Ohmmeter is designed to check and measure contact resistance in high voltage circuit breakers, disconnecting switches (isolators), busbar joints, or for any low resistance measurement. This DLRO test set accurately measures resistances ranging from 0.1µohm to 1ohm, at high currents.

The Megger DLRO200-115 is a versatile ductor that can provide test currents from 10 amps up to 200 amps, subject to the load resistance and supply voltage. For those applications that demand a smooth DC current, the DLRO200-115 has extra filtering on the output to reduce mains frequency ripple and can drive 200 amps through a total current loop resistance of 11 milliohms. The filtered output of the DLRO200-115 also eliminates magnetic transients that could inductively trip a breaker’s control (bus differential relay), if left in the test circuit.

The unique design allows the weight and size of the Megger DLRO200-115 to be kept to a minimum; the instrument weighs less than 32 lbs. (15 kg). This small size plus a water/dust ingress rating of IP54 makes the test set equally at home in the workshop, on the production floor or in the field.

300 sets of results may be stored in the Megger DLRO200-115E Digital Low Resistance Ohmmeters on-board memory for later download to a PC or may be outputted directly to a printer via the RS232 port. You may also add notes to any stored result by using the on-board alphanumeric keypad, thereby making later identification of results easier to determine.

Megger DLRO200-115 Features:

Small and weighs less than 33 lbs (15kg)
Test currents from 10 A to 200 A d.c.
Filtered direct current output eliminates magnetic transients
On board memory for up to 300 test results and notes
RS232 port to download stored results or for real time output to a printer
Supplied complete with 16 ft. (5m) test leads and download software

Megger DLRO200-115 Specifications:

Measurement Range	0.1 µΩ to 999.9 mΩ (Subject to supply voltage and leads used)
Accuracy	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 (20° 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
Display	Large, high resolution backlit liquid crystal display
Storage Capacity	300 result sets and memo, battery backed for 10 years.
Test Current Range	Filtered direct current; 10 A to 200 A d.c.
Voltmeter input impedance	>200 kΩ
Hum rejection	5 Vrms 50 Hz/60 Hz

Please contact us for more information on the Megger DLRO200-115 Digital Low Resistance Ohmmeter

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