Summary:

In order to verify that measurements made with a digital leveler "WILD NA 3000" are burdened with errors, distorting the results of these observations, nu-merous measurements of height differences between points of a leveling net set up in the Department of Environment and Geodesy of the University of Agriculture in Cracow were performed
Measurements were made on a network of three closed leveling mesh,
assessing of height differences in those leveling mesh 35-times.
To detect possible anomalies in the measurement, a statistical compatibility tests of Kolmogorov - Liliefors was used, checking the hypothesis Ho of normal distribution of measurement errors.
To verify and confirm the results coming from concerned test, additional test were launched using the statistics:
Cramer - von Mises: W2 and W12
Watson: U2 and U12
Performed analysis gives overview on measurements quality with use of tested instrument.