M
mlee97
Team,
I have noticed that it is a practice within my area calibration shops to calibrate and attest beyond the resolution of both their stated uncertainty and their ISO/IEC 17025 or A2LA accredited uncertainties.
For example: Their calibration certificate may post an uncertainty of +/- 0.00072 inch, but they call a gauge good when the gauge tolerance posted on the cert is +/- 0.00005 and they measure 0.000036".
To me, if you aren't 95% certain of a measurement at a 0.00071" then you shouldn't be attesting to the gauge's accuracy.
Am I misunderstanding something?
I have noticed that it is a practice within my area calibration shops to calibrate and attest beyond the resolution of both their stated uncertainty and their ISO/IEC 17025 or A2LA accredited uncertainties.
For example: Their calibration certificate may post an uncertainty of +/- 0.00072 inch, but they call a gauge good when the gauge tolerance posted on the cert is +/- 0.00005 and they measure 0.000036".
To me, if you aren't 95% certain of a measurement at a 0.00071" then you shouldn't be attesting to the gauge's accuracy.
Am I misunderstanding something?
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