Description
Megger DLRO200-EN Micro-ohmmeter Repair
The Megger DLRO200-EN is a high-current digital low-resistance ohmmeter (DLRO) — it passes up to 200 A test current through a connection and measures micro-ohm-level resistance to verify joints, contacts, breakers, and bus bars in substations. Its character is high-current sourcing plus precision low-resistance measurement, so faults concentrate in the current source, the measurement front-end, and the test-lead connections.
June Company repairs and calibrates the Megger DLRO200-EN for substation, switchgear, and transformer maintenance crews.
Common Megger DLRO200-EN problems we fix
- Won’t reach test current — the high-current source failing to deliver up to 200 A, repaired.
- Resistance readings drift or out of spec — the micro-ohm measurement front-end drifting, recalibrated against standards.
- Test-lead / connection faults — the heavy current leads and sense connections, serviced.
- Thermal-shutdown faults — the unit overheating during high-current tests, corrected.
- Display or interface faults.
FAQs
My DLRO won’t reach 200 A or readings drift — fixable? Yes. Current-source and measurement faults are repairable, then recalibrated so micro-ohm readings are accurate at test current, with a NIST-traceable certificate.
Are the test leads checked? Yes — the current and sense connections are verified.
Every repair includes NIST-traceable calibration and a 90-day parts-and-labor warranty. Email us or submit a service request.





