Description
Fluke 789 ProcessMeter Repair
The Fluke 789 is a ProcessMeter — it combines a true-RMS digital multimeter with a loop calibrator, measuring and sourcing 4–20 mA (with 24 V loop power and adjustable source) plus full DMM functions, to troubleshoot and calibrate process loops. Its accuracy depends on the DMM measurement circuitry and the mA source/measure circuit, which is where service and calibration focus.
FlukeMeterRepair.com repairs and calibrates the Fluke 789 for process-control and instrumentation technicians.
Common Fluke 789 problems we fix
- Input-protection failures — protection damaged after an over-range input or miswire, repaired.
- Rotary-switch degradation — intermittent function selection from a worn switch, repaired.
- mA source/measure out of spec — the loop source or measurement drifting, recalibrated against standards.
- DMM function faults — a multimeter function dead or inaccurate, repaired and recalibrated.
- Display or battery faults.
FAQs
My 789 switch is worn or a function is dead — fixable? Yes. Switch, input-protection, and measurement faults are repairable, then the meter is recalibrated so multimeter and loop functions read accurately, with a NIST-traceable certificate.
Do you calibrate both the meter and loop functions? Yes — all functions are checked against our standards.
Every repair includes NIST-traceable calibration and a 90-day parts-and-labor warranty. Email us or request service.
Frank Moore –
We use our Fluke 789 on a daily basis until the readings became erratic to the point we could not trust them. June Company calibrates our meters annually and said they also repair them. They repaired my meter very quickly and prorated my ISO calibration.