Electrical Safety Analyzer ECG simulator and electrical safety analyzer combined in one portable device The ESA612 is designed with portability, ergonomics, and ease of use in mind. It features ECG waveform tests and dual-lead measurements, combining the functionality of a simulator and safety analyzer. It also includes a replaceable mains fuse, an internal memory for 100 test records, and a USB connection for use with Ansur and Data Viewer software.