Description
Fluke 51 II Calibration
The Fluke 51 II is a contact thermometer, where the calibration has two independent parts: the instrument’s own measurement accuracy and its cold-junction compensation. The second is the one that produces errors which change with the ambient temperature of the room, which is what makes them so easy to misread as random.
The Fluke 51 II is calibrated at June Company for process technicians, HVAC contractors, food safety teams, and quality departments. 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 51 II
- Differential and dual-input readings where fitted.
- Input jack and connector integrity.
- Each supported thermocouple or RTD type independently.
- Cold-junction compensation across ambient conditions – the source of errors that shift as the room warms through the day.
- Measurement accuracy at multiple points across each range.
FAQs
What happens if it comes back out of tolerance? We record the as-found condition and tell you, because measurements you took with it since its last calibration may need reviewing. That is the reason as-found data matters.
Can it be adjusted if it has drifted? Where the instrument supports adjustment, yes – and the as-found and as-left readings are both recorded so the change is visible.
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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