Megger DLRO200 Micro-Ohmmeter

The Megger DLRO200 is an a.c. powered low resistance ohmmeter deigned to measure d.c. resistances in the low milliohms or microhms using a maximum test current of 200 Amps d.c. This versatile instrument can provide test currents from 10 amps up to 200 amps subject to the load resistance and supply voltage. A large LCD displays all all test parameters and measurement results. The unique design allows the weight and size of DLRO200 to be kept to a minimum; the instrument weighs less than 15 kg. This small size makes DLRO200 equally at home in the workshop,on the production floor or in the field. The high current capability and compact design make DLRO200 suitable for testing circuit breaker contacts, switch contacts, busbar joints or other applications where high current is needed. 300 sets of results may be stored in DLRO 200’s on board memory for later download to a PC or may be output 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 straightforward. FEATURES Small and weighs less than 15kg. Test currents from 10 A to 200 A d.c. 0.1 ?Ω best resolution. 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 5m test leads and download software. The use of a four terminal measurement technique removes the test lead resistance from the measured value although the use of lightweight current leads may prevent the DLRO200 from producing the full requested current. In this case the instrument will produce the highest current possible taking into account the resistance of the current leads and the item being tested. Megger DLRO200 Specifications Measurement Range 0.1 µΩ to 999.9 mΩ (subject to supply voltage and leads used). Voltage Accuracy +0.5% + 0.1 mV. Current Accuracy +0.5% + 0.1 A. Resistance Accuracy Better than 1% from 300 µΩ to 100 mΩ Better than +2% from 100 µΩ to 300 µΩ. Output Current Lead Resistance (Megger supplied leads) 2 x 5 m 25 mm2 current leads 8 m 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 10 minutes at 200 A @ 20 °C ambient. Power Supply for DLRO200 for full output (unsmoothed DC) 100 to 265 V 50/60 Hz with a load less than 19 mΩ (supply >207 V rms), or 11 mΩ (115 V rms) 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 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. General Specifications Operation -10 to +50°C. Storage -25 to +65°C. Calibration 20°C. Coefficient <0.05% per °C. Max Humidity 95% RH non-condensing. Max Altitude 2000m. Safety IEC61010-1. EMC IEC61326-1. Dimensions 410 x 250 x 270 mm. Weight 14.5 kg (excluding test leads), (31.97 lbs). DLRO200 warranty 2 years.

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