Description
Fluke 721EX-1603 Pressure Calibrator Repair
The Fluke 721EX-1603 is a dual-sensor pressure calibrator: two isolated pressure sensors in one instrument, so static and differential pressure can be read simultaneously. It was built for gas custody transfer and flow-computer work, where a small error becomes a measurement dispute rather than an inconvenience. Two sensors means two independent things that can drift. The Fluke 721EX-1603 is an intrinsically safe variant, rated for use in hazardous areas, and its protection circuitry is verified as part of the repair.
The Fluke 721EX-1603 is repaired at June Company by certified technicians who work on this class of instrument daily, for gas measurement technicians, custody transfer teams, and pipeline instrument crews. Every instrument is repaired at component level and verified against reference standards before it ships back, with the measured results documented.
Common Fluke 721EX-1603 problems we fix
- Pressure port leaks on one channel.
- Display, keypad and battery faults.
- Intrinsic safety barrier faults – the protection circuitry that makes this model suitable for hazardous areas, tested as part of every repair.
- One sensor drifted, the other reading correctly – the classic 721 symptom – and the reason a single-point check misses it.
- Both sensors out of tolerance – corrected and verified independently against reference standards.
- Static and differential readings disagreeing – the relationship between the two channels, which is the whole point of this instrument.
- mA loop measurement faults.
FAQs
What if it turns out not to be worth repairing? We tell you that in the quote. The evaluation costs nothing and there is no obligation to proceed.
This unit is used for custody transfer. How is accuracy documented? Both sensors are verified against reference standards and the measured results are documented for your records.
Every repair carries a 90-day parts-and-labor warranty, with a firm quote before any work begins. Email us or submit a service request.





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