ABSTRACT

A direct comparison of the standards is impossible. The comparison was performed using an EMF probe, which was calibrated in several labs, and then, the results were set up and published by the NIST (Kanda et al., 2000). The approach could lead to many errors and mistakes; however, the level of compared standards well illustrates the uncertainty of even the most accurate standards. By the way, the gure makes it possible to add a comment with regard to the estimation accuracy of a standard. The standard of the Technical University of Wroclaw (TUW) represents a similar accuracy level as the others. However, an optimistic, statistically supported analysis of the accuracy has led to its disagreement with the estimated mean value of the eld intensity.