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DLRO200-EN Ducter Digital Low Resistance Ohmmeter - 200A (English Keyboard)
Megger DLRO200 measures resistances between 0.1 µΩ and 1 Ω, at high currents.
This versatile instrument can provide test currents from 10 amps up to 200 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.
The unique design allows the weight and size of DLRO200 to be kept to a minimum; the instrument weighs less than 15kg. 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 DLRO200'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.
As well as adding notes to stored results, the alphanumeric keypad allows you to set the test current directly by typing in the value required. DLRO200 will check the continuity of the test circuit, and will quickly ramp the test current up to the desired level. The keyboard is also used to set upper and lower limits for the result and to prevent the use of excessive currents by setting an upper limit to the allowable test current.
DLRO200 uses a four terminal measurement technique to cancel the resistance of the test leads from the measurement.
DLRO200 operates in one of three modes, which are simply selected from the on screen menu.
CONTINUOUS mode is provided for users who wish to monitor a resistance over a period of time. Connect the test leads, select the test current and press the TEST button. DLRO200 will pass a current continuously, and measure the resulting voltage at 2-second intervals, until the test button is pressed to stop the test or the test circuit is interrupted.
In NORMAL mode you connect the leads, select the test current and press the TEST button. The test current will ramp up to the desired level, hold for 2 seconds and then ramp down. The whole process takes approximately 10 seconds.
In AUTO mode select the desired current, connect the current leads and press the TEST button. The TEST lamp will flash to show that the DLRO200 is ready to carry out a test. As soon as the potential leads are connected, a test will start. To repeat a test, simply break contact with the voltage probes and remake contact.
Measuring individual joints in a busbar is a good example of the convenience to be gained by using AUTO mode. The two current leads are connected to the ends of the busbar. They will remain connected here until all tests have been completed. When the voltage leads make contact across a joint, DLRO200 detects that all four leads are connected, carries out a test and stops. When you move to the next joint DLRO detects the new completed circuit automatically and carries out the next test, and so on until all joints have been tested. The results may be stored automatically and may be recalled to the display or downloaded for review.
| 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 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 60 seconds at 200 A @ 20°C 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 |
|
| Power Supply for DLRO200-115 V for full output (additional smoothing) | |
| 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 | 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 |
| Temperature | |
| Operation | -10 to +50°C (-14 to +122°F) |
| Storage | -25 to +65°C (-13 to 149°F) |
| Calibration | 20°C |
| Co-efficient | <0.05% per °C |
| Max. Humidity | 95% RH non-condensing |
| Maxi Altitude | 2000 m |
| Safety | IEC61010-1 |
| EMC | IEC61326-1 |
| Dimensions | 410 x 250 x 270 mm (16.4 x 9.84 x 10.63 ins) |
| Weight | 14.5 kg (excluding test leads) (31.97 lbs) |
Micro / Milli / Meg Ohmmeters/Micro-Ohmmeter / DLRO / Bond Testing Template |
|
|---|---|
| Style (Micro-Ohmmeter) | Portable |
| Maximum Test Current | 200 A |
| Variable Test Current | Yes |
| Min Resistance | 0 Ohms (0 m Ohms) |
| Max Resistance (ohm) | 999.9 M Ohms (999900000 Ohms) |
| Alarm | No |
| Temperature Compensation | No |
| Line Power or Battery power | Line Power |
| Kelvin Four-Terminal Measurement | Yes |
Test Equipment General Attributes |
|
| Unique Features | Stores up to 300 test results. Smooth, continuous applied current eliminates magnetic transients capable of inductively tripping breaker controls |
| Warranty | 1 YEARS |
| Safety Approval | CE |
| Interfaces I/O | RS-232 |
| Product Weight | 33 LBS |
| Product Height | 10.65 IN |
| Product Length | 16.4 IN |
| Product Width | 9.9 IN |
| Shipping Weight | 40 LBS |
| Data Logging | Yes |
| HTS/Schedule B Number | 9030390000 |
| ECCN Number | EAR99 |
| Power Supply Voltage | 120V 50/60 Hz |
| Country of Origin | United Kingdom |
| Shipping Height | 12.00 IN |
| Shipping Length | 19.00 IN |
| Shipping Width | 18.50 IN |
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