Description
Fluke 437-II Power Quality Analyzer Repair
The Fluke 437-II is a three-phase power quality and energy analyzer — a 400 Hz-capable instrument (for aerospace/military and standard 50/60 Hz systems) that measures voltage, current, power, harmonics, and PQ events across all phases to IEC 61000-4-30 Class A. Its accuracy depends on the voltage and current measurement inputs, so that’s where service and calibration focus.
FlukeMeterRepair.com repairs and calibrates the Fluke 437-II for power-quality engineers, utility, and aerospace/defense teams.
Common Fluke 437-II problems we fix
- Current-input or probe channel faults — a phase not reading from its probe, repaired so all phases measure.
- Input-protection restoration — protection damaged after an over-range input, repaired.
- Readings out of spec — measurement-circuit drift, recalibrated against standards.
- Won’t power on or hold a charge — battery and power faults.
- Display or input faults.
FAQs
One phase isn’t reading on my 437-II — fixable? Yes. Input-channel and protection faults are repairable, then all inputs are recalibrated so power, harmonics, and PQ measurements (50/60/400 Hz) are accurate, with a NIST-traceable certificate.
Are the current inputs verified? Yes — checked against our standards.
Every repair includes NIST-traceable calibration and a 90-day parts-and-labor warranty. Email us or request service.






Jim Preston –
My Fluke 437-II was dropped and the display had a massive amount of line on it. So bad, I could not get results. Found June Company online, and they did a superb job with emailing the information and helping out along the repair process. I would recommend June Company for meter repair.