What is it
Micro-ohm measurement (ductor) to evaluate resistance in power joints/connections.
Why is it done
High values generate heating and losses; good contact ensures reliability and safety.
How is it done
- Instrument: micro-ohmmeter with injected current.
- Use Kelvin probes, clean surfaces, and ensure constant pressure/contact.
- Perform several repetitions until stabilized and document ambient temperature.
Expected results
- Low and stable mΩ; compare with manufacturer/specification.
- Scattered or increasing values → check tightness, oxidation, and surface condition.