Description
Fluke 381 Calibration
The Fluke 381 is a clamp meter, which is calibrated differently from a bench instrument because the measurement depends on a magnetic circuit. Jaw alignment, jaw wear and where the conductor sits inside the opening all affect the reading, so verification has to account for the jaws and not only the electronics behind them.
The Fluke 381 is calibrated at June Company for electricians, industrial maintenance teams, HVAC technicians, and energy auditors. Every point is measured against reference standards, with as-found readings recorded before any adjustment and as-left readings afterwards, so you can see what condition the instrument was actually in when it arrived.
What we verify on the Fluke 381
- Voltage and resistance functions where fitted.
- Inrush and peak capture where fitted.
- Frequency and power measurement on the advanced models.
- AC current across all ranges, at several positions in the jaw.
- DC current on models with Hall-effect sensing.
- Jaw alignment and closure – a gap or a worn mating face changes the reading before any electronics are involved.
FAQs
How long does calibration take? Most are completed in 5-10 business days. If we find a fault that calibration cannot correct, we quote the repair before doing anything further.
Is the calibration traceable? Yes. Every point is measured against reference standards and the results are documented and returned with the instrument.
Calibration is documented and returned with the instrument. If we find a fault that calibration cannot correct, we quote the repair before going any further. Email us or submit a service request.



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