Cables (ECG).
Inspect the patient cable and leads and their strain reliefs for general condition. Examine cables carefully to detect breaks in the insulation and to ensure that they are gripped securely in the connectors of each end to prevent rotation or other strain. Connect the unit to an ECG simulator and verify that a clean (i.e., noise-free) ECG waveform is displayed on the monitor's screen. Flex the patient cable near each end to verify that there are no intermittent faults (e.g., leads off messages/alerts).