The Sonel MRU-21 is an earth resistance meter based on the 3-pole measurement system. The MRU-21 features automatic compensation for the used test leads. In addition, it is possible to adjust the maximum measuring voltage. This meter can be carried around the neck and features soft-touch buttons for easy use. A big multifunctional LCD display shows the results and explains the necessary user inputs. All functions are easy accessible and customizable with the soft-touch buttons through the built-in menu.
The MRU-21 can be connected to a PC with the supplied USB-cable. Measurement results can then be downloaded with the included Sonel Reader software. The internal memory of the meter can support up to 990 measurements.
Specifications
| Measurement range of earthing resistance | 0 - 1,99 kΩ |
| Measurement range of interference voltage UN (RMS) | 0 - 100V |
| Measurement range of resistance of auxiliary electrodes RH & RS | 0 - 50.0 kΩ |
| Measurement range of continuity of equipotential bondings and protective conductors | 0.13 - 199 kΩ |
| IP Rating | IP54 |
| Internal Memory | up to 990 measurements |
| Connectivity | USB |
| Safety Category | CAT IV 300V |
| Number of measurements on 1 battery charge | > 1000 |
| Dimensions | 288 x 223 x 75 mm |
| Weight | 1.4 kg |
Accessories
The Sonel MRU-21 comes in a professional kit, which includes:
- USB cable
- 30m red test lead on reel
- 15m blue test lead on reel
- 1.2m blue test lead with banana plug
- 2.2m black test lead with banana plug
- Black & blue crocodile clips
- 2 x 30cm earth probes
- Carrying case
- Hanging straps
- Batteries (4xLR14)
- Sonel reader software
- Calibration certificate
Pros and cons
- 2-pole & 3-pole measurements are supported
- Battery indicator
- Auto shutdown when device is not used
Downloads
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