Status: 5790B / 9640A Current Production — 5790A / 96040A / 96270A Legacy. We repair and calibrate all of them.
Common Fluke Measurement Standard Problems We Fix
- Output or measurement out of tolerance / drifting beyond spec
- AC thermal converter drift (5790A / 5790B)
- RF output level inaccurate or leveling fault at high frequency
- Internal reference standard drift beyond rated tolerance
- Precision attenuator shifted / mechanical wear
- Won’t power on or intermittent power faults
- Won’t communicate over GPIB / USB (automated cal fails)
Don’t see your exact problem? We repair all Fluke measurement standard and RF reference source faults — email us and describe what’s happening.
Fluke Measurement Standard & RF Reference Models We Repair
| Model | Description | Service |
|---|---|---|
| Fluke 5790B | AC measurement standard, 1 mV–1000 V, 10 Hz–1 MHz | Request Repair |
| Fluke 5790A | AC measurement standard (discontinued, replaced by 5790B) | Request Repair |
| Fluke 9640A | RF reference source, 10 kHz–4 GHz | Request Repair |
| Fluke 96270A | Low-frequency RF reference source (legacy) | Request Repair |
| Fluke 96040A | RF reference source (legacy) | Request Repair |
How to Send In Your Fluke Measurement Standard
- Tell us what’s wrong. Email us or submit a service request with your model and the problem.
- Ship it to us. Send your unit from anywhere in the US — we provide prepaid shipping labels on request.
- Get a firm quote. We evaluate it and send a no-obligation repair quote. No work is done until you approve.
Email: info@junecompany.com | All repairs include NIST-traceable calibration and a 90-day parts-and-labor warranty.
Frequently Asked Questions
How much does Fluke measurement standard / RF reference source repair cost?
Repairs start with a flat evaluation fee that’s credited toward your repair cost. After we diagnose the unit, you get a firm quote before any work begins — no surprises.
How long does the repair take?
Most repairs are finished within 5–10 business days of arrival. Because these are primary reference standards, we can discuss expedited turnaround if your lab is down.
My 5790A/B has drifted out of tolerance — can you bring it back into spec?
Yes. AC thermal-converter drift is the most common 5790-series fault. We repair the cause and verify performance against our reference standards to restore rated accuracy.
Can you repair the 9640A / 96040A RF output and leveling faults?
Yes. RF output-leveling degradation and attenuator shift at high frequency are common reference-source repairs, restored and verified across the unit’s frequency range.
Do you still repair the legacy 5790A, 96040A, and 96270A?
Yes. These legacy standards and reference sources are fully supported for repair and recalibration even though they’re superseded by current models.
Is the repair NIST-traceable, and do I get a certificate?
Yes. Every repair includes NIST-traceable calibration of the primary functions, documented on a certificate against Fluke’s published specifications — essential for a reference standard in your lab.
What if my exact model isn’t listed?
We service every Fluke measurement standard and RF reference source. If your model isn’t in the table, pick the closest match or email us — the process is the same.
Who uses Fluke measurement standards and RF reference sources?
National metrology institutes, primary standards laboratories, RF calibration facilities, and military electronics calibration programs rely on the 5790A/B and 9640A/96xxx series as their accuracy foundation.
See also our Fluke 5700 Series repair, Fluke 5500 Series repair, and Fluke oscilloscope calibrator repair pages, or browse all calibrator repair services.
