Fluke CNT-91R Timer Counter Repair

Description

Fluke CNT-91R Timer/Counter Repair

The Fluke CNT-91R is a high-performance timer/counter/analyzer with a rubidium timebase — a benchtop instrument that measures frequency, period, and time interval with very high resolution and an ultra-stable reference for demanding calibration work. Its accuracy lives in the timebase reference and the counting/measurement circuitry, which is where service and calibration focus.

FlukeMeterRepair.com repairs and calibrates the Fluke CNT-91R for calibration labs and electronics shops.

Common Fluke CNT-91R problems we fix

• Timebase / OCXO-reference drift — the oven-controlled reference out of spec, recalibrated against standards.
• Input / counting-circuit faults — a channel not counting or triggering correctly, repaired.
• A function dead — a measurement mode failed, repaired.
• Communication / interface faults — the GPIB/USB/remote interface not connecting, repaired.
• Display or power faults.

FAQs

My CNT-91R measures inaccurately — fixable? Yes. Timebase and input faults are repairable, then the counter is recalibrated against our standards so frequency and interval measurements are accurate, with a NIST-traceable certificate.

Is the timebase 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.