ELECTRICAL AND ELECTRONIC APPARATUS, APPLIANCES AND INSTRUMENTS FOR MEASURING, REGISTERING AND MONITORING OTHER ELECTRICAL DEVICES FOR PERFORMANCES, ANOMALIES AND ANALYSIS OF EVENTS-NAMELY, ELECTRICAL MESSAGE AND DATA RECORDERS FOR PROCESSING AND TRANSFERRING; STORAGE INPUT AND OUTPUT UNITS FOR RECORDING, MONITORING AND STORING TEST VALUES TO BE REPLAYED AFTER A PRESELECTED DELAY PERIOD; INTERFERENCE RECORDERS AND PARTS THEREOF