| Micro OhmMeter RMO300 |
Brochure RMO300 
Print this page  |
- Lightweight - only 7,5 kg
- Powerful 5 A - 300 A DC
- Measuring range 0 – 999,9 mΩ
- Resolution to 0,1 µΩ
- SINGLE / CONT Mode
- Mechanical protection IP54
|
| High DC current resistance meter |
| Description |
RMO300 is a micro-ohmmeter based on state of the art technology, using the most advanced switch mode technique available today. RMO300 generates true DC current with automatically regulated test ramps. During the test RMO300 ramps with increasing current before measuring and decreasing current after the measurement. This eliminates magnetic transients. After the test current has been set, the automatic test procedure is started by pressing the Ω-button.
The RMO300 instrument can store up to 500 measurements. All measurements are time and date stamped. Using RMOWin software a test can be performed from a PC, and the results can be obtained directly at a PC. Using RMOWin the result can be arranged as an Excel spreadsheet which can be later shown as a diagram and printed for a report.
The set is equipped with thermal and overcurrent protection. The RMO300 has very high ability to cancel electrostatic and electromagnetic interference in HV electric fields. It is achieved by very efficient filtration. The filtration is made utilizing proprietary hardware and software. |
| Output Ratings |
| The full output is available from the RMO300 at 230 V Mains Supply. A reduced output is available from lower supply voltages. |
| 230V AC |
300A DC smoothed |
5,6V DC |
| |
200A DC smoothed |
6,0V DC |
| 115V AC |
300A DC smoothed |
5,0V DC |
| |
200A DC smoothed |
6,0V DC |
|
| Output current is filtered and has a ripple of less then 1%. |
| CONT Mode |
| RMO300 can generate DC current continuously using the CONT menu. In this menu the current can be chosen the same way like in the SINGLE menu, but the duration of the test can be preset. The test is started pressing the Ω-button. During the test, a new result is shown on the display and stored into the PC (RMOWin) each second. Using RMOWin the result can be arranged as an Excel spreadsheet which can be later shown as a diagram and printed for a report. |
| Application |
| Typical application is measuring resistance of: |
- High, middle and low voltage circuit breakers
- High, middle and low voltage disconnecting switches
- High-current bus bar joints
- Cable splices
- Welding joints
|
| Standard accessories |
- Current cables 2x5m 35mm2 with battery clips
- Sense cables 2x5m 2,5mm2 with alligator clips
- RMOWin PC software
- Mains power cable
- Ground (PE) cable
- Transport bags
|
 |
 |
 |
| Voltage sense cables |
Current cables |
Extension cable |
|
| Optional accessories |
- Built-in thermal printer
- Remote control unit
- Current clamp meter
- Transport case
- Test shunt 100µΩ
- Current cables 2x10m 35mm2 with battery clips
- Current cables 2x15m 50mm2 with battery clips
- Extension cable 1x10m 50mm2
- Sense cables 2x10m 2,5mm2 with alligator clips
- Sense cables 2x15m 2,5mm2 with alligator clips
- Sense cables, extension 2x10m 2,5mm2
|
| |
 |
 |
 |
| Transport bags |
Shunt |
Transport case |
|
| |
| Connecting a Test Object to RMO300 |
| With RMO300 turned off, connect RMO300 to the test object (RX) in such a way that the measuring cables from the "Voltage Sense" sockets are attached as close as possible to RX, and in between the current feeding cables. That way, resistance of both cables and clamps is almost completely excluded from the resistance measurement. |
 |
| Remote Control Unit |
 |
The RMO Remote Control Unit is an optional control unit that is used to start and stop the tests from a remote location, away from the actual RMO. Provided that, for a series of tests, the same test current is fed through the test object, multiple measurements can be carried out with the RMO Remote Control Unit. |
| |
|
| Current clamp meter |
| Using RMO300 with current clamp meter it is possible to make safer measurement of breakers with both sides of the breaker grounded. It is performed by measuring the current through the ground connection and reducing this value from the total current. |
 |
|
| |
|
| Technical data |
| 1 Mains Power Supply |
|
| - Connection |
according to IEC/EN60320-1; UL498, CSA 22.2 |
| - Mains supply |
from 90 V to 264 V AC; 50-60 Hz |
| 2 Output data |
|
| - Test current |
5 A - 300 A DC |
| - Measuring range |
Resolution |
| 0,1µΩ - 999,9µΩ |
0,1 µΩ |
| 1,000mΩ - 9,999mΩ |
1 µΩ |
| 10,00mΩ - 99,99mΩ |
10 µΩ |
| 100,0mΩ - 999,9mΩ |
0,1 mΩ |
| - Typical accuracy |
±(0,2% rdg + 0,2% FS) |
| 3 Environment conditions |
| - Operating temperature -10 °C - +55 °C / 14 F - 131 F |
| - Storage temperature -40°C - +70 °C / 40 F - 158 F |
| - Maximum relative humidity 95 % non-condensing |
| 4 Dimensions and Weight |
| - Dimensions |
198 mm x 255 mm x 380 mm
7,8 in x 10 in x 15 in
(W x H x D) without handle |
| - Weight |
7,5 kg/16,5 lb |
| 5 Mechanical protection |
IP54 |
| 6 Warranty |
two years |
| 7 Safety Standards |
| - European standards |
LVD 2006/95/EC
EN 61010-1 |
| - International standards |
IEC 61010-1
UL 61010-1
CAN/CSA-C22.2 No. 61010-1, 2nd edition, including Amendment 1 |
| 8 Electromagnetic Compatibility (EMC) |
| - CE conformity |
EMC directive 2004/108/EC |
| - Emission |
EN 61326-1 |
| - Immunity |
EN 61326-1 |
|
| |