The tests are implemented by specifying critical values for parameters representing each specific error. These critical values were determined from expected normal ranges of various parameters, visual inspection of flagged records, and comparison of the flagged data with simultaneous measurements from other instruments. Visual inspection of all records hard flagged by the automated procedures is done to either verify an instrument problem or to identify plausible behavior. In the former case, the hard flag is verified and the record is eliminated. The hard flags sometimes identify unusual but physically plausible situations. In these cases, the hard flag from the automated procedure is changed to a soft flag and the record is retained. The set of tests was applied to tower data from RASEX and Microfronts95 and aircraft data from BOREAS. To accumulate additional experience, the package of tests have also been applied to additional datasets not discussed above