Description
Fluke 709 Loop Calibrator Repair
The Fluke 709 is a precision mA loop calibrator — it sources and measures 4–20 mA loop current and provides loop power for calibrating and troubleshooting process transmitters and control loops. Its precision lives in the mA source/measure circuit, which is where service and calibration focus.
June Company repairs and calibrates the Fluke 709 for instrument-calibration and process technicians.
Common Fluke 709 problems we fix
- Output-DAC / mA source out of spec — the 4–20 mA source drifting, recalibrated against standards.
- mA measurement inaccurate — the measure side drifting, recalibrated.
- Loop-power / 24V output faults — the loop-supply function, restored.
- Input protection blown — after a miswire, repaired.
- Display or battery faults.
FAQs
My 709 mA source or measure drifted — fixable? Yes. The mA source/measure circuit is repairable and recalibrated, then verified so source, measure, and loop power are accurate, with a NIST-traceable certificate.
Is the loop-power function verified? Yes — checked along with source and measure.
Every repair includes NIST-traceable calibration and a 90-day parts-and-labor warranty. Email us or submit a service request.









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