Art-Nr.: WMDEMMR640
Sonel MMR-640 Microohmmeter
| Range | Resolution | Current resolution | Accuracy |
|---|---|---|---|
| 0...999,9 μΩ | 0,1 μΩ | 10 A | ±(0,25% v.Mw. + 2 Digits) |
| 1,0000...1,9999 mΩ | 0,0001 mΩ | 10 A | ±(0,25% v.Mw. + 2 Digits) |
| 2,000...19,999 mΩ | 0,001 mΩ | 10 A | ±(0,25% v.Mw. + 2 Digits) |
| 20,00...199,99 mΩ | 0,01 mΩ | 10 A / 1 A | ±(0,25% v.Mw. + 2 Digits) |
| 200,0...999,9 mΩ | 0,1 mΩ | 1 A / 0,1 A | ±(0,25% v.Mw. + 2 Digits) |
| 1,0000...1,9999 Ω | 0,0001 Ω | 1 A / 0,1 A | ±(0,25% v.Mw. + 2 Digits) |
| 2,000...19,999 Ω | 0,001 Ω | 0,1 A | ±(0,25% v.Mw. + 2 Digits) |
| 20,00...199,99 Ω | 0,01 Ω | 10 mA | ±(0,25% v.Mw. + 2 Digits) |
| 200,0...1999,9 Ω | 0,1 Ω | 1 mA | ±(0,25% v.Mw. + 2 Digits) |
The MMR-640 is a powerful microohmmeter specially developed for measuring very low resistances. Thanks to high immunity to interference, automatic measuring range selection and intuitive operation, it is perfectly suited for use in power plants, railway engineering, maintenance companies and industrial final inspection.
Typical applications
- Measurement of protective conductor and contact resistances
- Testing of earth connections and equipotential bonding
- Evaluation of welded and soldered joints
- Measurement on screw and clamp connections
- Quality control in series production
Technical advantages at a glance
- Highly precise measurement of very low resistances
- Large, easy-to-read colour touchscreen (800 × 480 pixels)
- Automatic measuring sequences & measuring range selection
- High immunity to interference for reliable results
- Robust IP67 housing – dustproof and waterproof
Robustly built for tough use
The housing of the MMR-640 is designed for harsh environments. With its protection rating IP67 it withstands dust, dirt and temporary immersion in water – perfect for outdoor use or demanding industrial environments.
Operating comfort and data utilisation
The modern user interface with large touchscreen enables quick navigation and clear display of measurement results. Thanks to automatic measuring ranges, the measuring process is simplified, allowing recurring test tasks to be carried out efficiently as well.
Conclusion: The MMR-640 is the ideal choice for anyone who needs precise low-resistance measurements – whether in the field, in the workshop or in production. Robust, accurate and easy to operate.
| Properties |
|---|
| Display: | TFT (800 x 480 px) |
|---|---|
| Humidity max.: | 90% |
| measurement category: | CAT III 600 V |
| operating temperature: | -10°C - +50°C |
| protection rating: | Enclosure IP 40, Enclosure IP 54 (open, battery operation, with cover flaps), Enclosure IP 54 (open, mains connection) |
| storage temperature: | -20 - +60 °C |
| Weight: | 3.5 kg |
| Width: | 257 mm |
| Height: | 152 mm |
| Length: | 318 mm |
| Range | Resolution | Current resolution | Accuracy |
|---|---|---|---|
| 0...999,9 μΩ | 0,1 μΩ | 10 A | ±(0,25% v.Mw. + 2 Digits) |
| 1,0000...1,9999 mΩ | 0,0001 mΩ | 10 A | ±(0,25% v.Mw. + 2 Digits) |
| 2,000...19,999 mΩ | 0,001 mΩ | 10 A | ±(0,25% v.Mw. + 2 Digits) |
| 20,00...199,99 mΩ | 0,01 mΩ | 10 A / 1 A | ±(0,25% v.Mw. + 2 Digits) |
| 200,0...999,9 mΩ | 0,1 mΩ | 1 A / 0,1 A | ±(0,25% v.Mw. + 2 Digits) |
| 1,0000...1,9999 Ω | 0,0001 Ω | 1 A / 0,1 A | ±(0,25% v.Mw. + 2 Digits) |
| 2,000...19,999 Ω | 0,001 Ω | 0,1 A | ±(0,25% v.Mw. + 2 Digits) |
| 20,00...199,99 Ω | 0,01 Ω | 10 mA | ±(0,25% v.Mw. + 2 Digits) |
| 200,0...1999,9 Ω | 0,1 Ω | 1 mA | ±(0,25% v.Mw. + 2 Digits) |