600 A micro-ohmmeter for resistive and inductive loads including amorphous core transformers. Winding resistance, circuit breaker contacts and busbar joint measurement.
The Sonel MMR-650 Micro-Ohmmeter is designed specifically for measuring very low resistances on both resistive and highly inductive objects — including amorphous core transformers which present a particular challenge for standard micro-ohmmeters. With test current up to 600 A DC, it delivers accurate contact resistance measurements on circuit breaker contacts, busbar joints, cable terminations and transformer windings.
The MMR-650's capability with inductive loads sets it apart — making it the preferred choice for transformer winding resistance measurement. Fully automated test sequences with data logging and colour LCD display.
| Tier | Duration | Daily Rate |
|---|---|---|
| Tier 1 | 1–7 days | $120/day |
| Tier 2 | 8–14 days | $105/day |
| Tier 3 | 15–28 days | $85/day |
| Tier 4 | 29–90 days | $70/day |
| Week | Fortnight | Month | 60 Days |
|---|---|---|---|
| $840 | $1,575 | $2,765 | $5,005 |
All rates ex-GST. Minimum 1 day hire. Freight additional.
| Manufacturer | Sonel |
| Model | MMR-650 |
| Max Test Current | 600 A DC |
| Resistance Range | 0.1 µΩ to 2000 Ω |
| Inductive Load Capability | Yes — amorphous core transformers |
| Display | Colour LCD |
| Memory | Internal data logging |
| Calibration | Annual |
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