Description
Fluke 7109A Calibration Bath Repair
The Fluke 7109A (Hart Scientific) is a portable calibration bath with refrigerated cooling — a stirred liquid bath that holds a fluid at a uniform, stable temperature across a wide range for immersion calibration of temperature sensors. Its precision depends on the heating/cooling system, the stirrer/circulation, the temperature control and reference sensor, and the bath tank, which is where service and calibration focus.
FlukeServiceCenter.com repairs and calibrates the Fluke 7109A for calibration laboratories, pharmaceutical process engineers, and metrology facilities.
Common Fluke 7109A problems we fix
- Cooling-compressor failure — won’t reach low setpoints, the refrigeration system repaired.
- Heating-element faults — won’t reach high setpoints, the heater repaired.
- Circulation-pump / stirrer wear — poor circulation causing gradients, rebuilt.
- Temperature-controller drift — the controller or reference sensor reading the wrong setpoint, recalibrated against standards.
- Display, interface, or power faults.
FAQs
My 7109A won’t reach or hold temperature — fixable? Yes. Heating/cooling, circulation, and control faults are repairable, then it’s recalibrated so bath temperature is accurate, stable, and uniform, with a NIST-traceable certificate.
Is stability verified? Yes — stability and uniformity are verified against our standards.
Every repair includes NIST-traceable calibration and a 90-day parts-and-labor warranty. Email us or request service.





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