8-27 
Symptoms Possible Cause  Correction Action 
Cable or lead wires 
damaged 
Change cable and lead wires. 
Excessive alarms: heart 
rate, lead fault 
Electrodes dry  Repeat skin preparation as described in 
8.3.1 Preparing the Patient and 
Placing the Electrodes and apply 
fresh, moist electrodes. 
Excessive patient movement 
or muscle tremor 
Reposition the electrodes. 
Replace fresh and moist electrodes if 
necessary. 
Low Amplitude ECG 
Signal 
Gain set too low  Set the gain as required. For details, 
refer to 8.5.8 Changing ECG Wave 
Settings. 
Electrodes dry / old  Apply fresh and moist electrodes. 
Skin improperly prepared  Repeat skin preparation as described in 
8.3.1 Preparing the Patient and 
Placing the Electrodes. 
This could be the patient’s 
normal QRS complex 
Verify with another well-functioning 
monitor. 
Electrode could be 
positioned over a bone or 
muscle mass 
Move ECG patches away from the 
bone or muscle mass. 
No ECG Waveform  Gain set too low  Set the gain as required. For details, 
refer to 8.5.8 Changing ECG Wave 
Settings. 
Lead wires and patient cable 
not fully or properly inserted
Check that the leadwires and patient 
cables are properly connected. 
Cable or lead wires 
damaged 
Change cable and lead wires. 
Base Line Wander 
 
Patient moving excessively  Secure leadwires and cable to patient. 
Electrodes dry or loose  Repeat skin preparation as described in 
8.3.1 Preparing the Patient and 
Placing the Electrodes and apply 
fresh and moist electrodes. 
ECG Filter set to ST or 
Diagnostic mode 
Set ECG Filter to “Monitor” mode.