HomeBlogArticlesExplanation of setting hazards in calibration reports

Explanation of setting hazards in calibration reports

Dear QCC customers.

QCC calibration technologies is ISO 17025 ISRAC accredited laboratory.

Due to ISRAC regulations QCC is required to change its conduct towards calibration report conclusions.

In general, calibration labs must provide the customer with credited results, including measurement uncertainty

According to ISO17025, the lab may determine report conclusions in the form of “state compliance” or “non-compliance” taking into consideration measurement uncertainty.

calibration standard – defines permissible deviation for the tested tool.
Since most standards and manufacturers fail to take into consideration measurement uncertainties when setting permissible deviations for a tool, it is required that stating compliance or non compliance, with uncertainty considered, causes issues.

in the past, on QCC reports, determining conclusions was post permissible deviations widening by measurement uncertainty.

ISRAC’s instructions to stop the widening and to apply standard requirements changes QCC calibration report procedure.

Conclusion stating will be as followed:

Complies – All measured values are within the specification limits when the measurement uncertainty is taken into account. see below case 6.

Does not comply – Some of measured values are outside the specification limits when the measurement uncertainty

is taken into account. see below case 10

Not possible to state compliance or non-compliance – Some of measured values are overlap the specification limits

when the measurement uncertainty is taken into account. see below cases: 7, 8, 9

In any case, customer may ask the calibration lab to produce a report with no conclusion specified and to determine usage according to calibration results. In addition, the customer may specify permissible deviations, different than those set by manufacturers or standards, relying on working procedures and ask the lab to calibrate according to those values.

QCC Calibration technologies.

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