User-modified values can be stored and used later as long as the DELTA 3000 is not shut down. The user may also not store modified values; thus, values that were not part of the original test will still be called up in future tests. The test program continues until all parameters have been tried, and the DELTA 3000 stores the measured values for each test in memory. At the end of the automatic test program, the test results are transferred to a printer or to a PC via the RS232 interface. The set values are compared with the measured values of the DELTA 3000-user-manual-R2.doc34 . If the deviation is more than 10%, a comment on the effect is issued and printed out.