PS400 ECG/Arrhythmia Simulator The PS400 is an affordable simulator for basic quality-assurance testing of ECG machines, monitors and telemetry units. The lightweight, handheld device features 12-lead ECG output and a single high-level output. Technicians can use manual or automatic sequence modes to check low- and high-frequency response, linearity, gain, damping, and paper speed. The PS400 also includes 12 arrhythmia selections to check arrhythmia detection systems and teach health care workers how to recognize normal and abnormal heart rhythms. Using the PS400 is easy. The user interface features a menu selector switch and a simple-to-use rotary knob for selecting waveforms.