Description
Fluke 1577 Insulation Tester Repair
The Fluke 1577 is an insulation resistance tester – it applies a high DC test voltage and measures the very small leakage current that results, which is a demanding combination: generating hundreds or thousands of volts while resolving currents in the nanoamp range, inside a handheld case.
June Company’s certified technicians repair the Fluke 1577 for electrical contractors, maintenance electricians, motor shops, and cable testing crews. Every instrument is repaired at component level and verified against reference standards before it ships back, with the measured results documented.
Common Fluke 1577 problems we fix
- Output or measurement drifted out of tolerance – corrected and verified against reference standards.
- Battery, charging or power faults.
- Display, keypad or interface faults.
- Test voltage low or not generating – the high-voltage generation stage – a tester producing 300 V instead of 1000 V still returns a plausible-looking resistance figure that is simply wrong.
- Resistance readings inaccurate at the high end – the measurement path, where the currents involved are extremely small and drift shows first on the highest ranges.
- Will not discharge the circuit after a test.
- Test lead or terminal faults.
FAQs
Do you service instruments past manufacturer support? Yes. Much of what we repair is out of support, which is exactly where component-level work earns its keep.
How do I know it is really applying the test voltage it claims? You cannot tell from the reading, which is the problem. We verify the actual output voltage as well as the resistance measurement.
Every repair carries a 90-day parts-and-labor warranty, with a firm quote before any work begins. Email us or submit a service request.







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