Uncertainty is the estimate of a possible variation between the level of activity measured by LEA and the actual activity.

The uncertainty indicated in the calibration certificate corresponds to the expanded uncertainty expressed with a k=2 enlargement factor. The value of the enlargement factor is related to the desired confidence level:

  • 68% for k = 1
  • 95% for k = 2
  • 99% for k = 3
These percentages correspond to the application of the Gaussian mathematical function.



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