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Equipped for resistance measurements from 0.1µΩ to 1Ω at high currents, Megger has introduced their DLRO200-EN Digital Low Resistance Ohmmeter. The ohmmeter delivers test currents from 10 amps up to 200 amps subject to the load resistance and supply voltage, all while maintaining a lightweight, compact design.
The DLRO200-EN employs a four terminal measurement technique to cancel the resistance of the test leads from the measurement. Then, users can easily select from Continuous, Normal and Auto operation modes directly from the onscreen menu. Up to 300 sets of results can be stored in the on board memory for later access or immediately outputted to a printer by way of the RS232 port. Even more, an alphanumeric keypad enables the test current, upper and lower limits to be directly established by typing in the required value. Supplied with 16.4 ft. (5m) test leads, Megger’s DLRO200-EN is a complete low resistance measurement value.
| 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 300 μΩ to 100 mΩ Better than ±2% from 100 μΩ to 300 μΩ |
| Current Lead Resistance (Megger supplied leads) | |
| 2 x 5 m 25 mm² current leads | 8 mΩ |
| 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 ºC ambient. | |
| Power Supply for DLRO200 for full output (unsmoothed d.c.) | |
| 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 to 200 A DC (dependant on load and input voltage) |
| Accuracy: | ±2% ±2 A |
| Voltmeter input impedance: | >200 kΩ |
| Hum rejection: | 5 V rms 50 Hz/60 Hz |
| Temperature Operation: | -10 to +50 ºC (-14 to +122 ºF) |
| Storage: | -25 to +65 ºC (-13 to +149 ºF) |
| Calibration: | 20 ºC |
| Co-efficient: | <0.05% per ºC |
| Max. Humidity: | 95% RH non-condensing |
| Max Altitude: | 2000 m |
| Safety: | IEC61010-1 |
| EMC: | IEC61326-1 |
| Dimensions: | 410 x 250 x 270 mm (16.4 x 9.84 x 10.63 in) |
| Weight: | 14.5 kg (excluding test leads) (31.97 lbs) |
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