.
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8.4 Baseline drift
Whether the electrode installation is stable?
Whether the connection of lead cables or electrodes is reliable?
Whether the electrodes and patient skin are cleaned and are daubed with enough
conductive paste?
Whether it is caused by patient's movement or breathing?
Whether the electrodes or leads are in bad connection?
Note: If the interference can not be removed after taking above measures, please use a
baseline filter.
8.5 Troubleshooting list
Phenomenon
Cause of failure
Solutions
Too large
interference,
disorderly
waveform
1. Grounding cable is not
connected reliably.
2. Lead cables are not connected
reliably.
3. There is AC interference.
4. Patient is nervous and can not
keep quiet.
1. Check the power cord and lead cables.
2. Let the patient prepare for the
measurement.
Baseline burr
1. AC interference is large.
2. Patient nervous, and EMG
interference is large.
1. Improve the environment.
2. If the bed is made of steel, replace it.
3. The power cable and lead cables are
not parallel or too close to each other.
Not regular
waveform, large
up-and-down,
beeline figure
1. Bad electrode conductivity.
2. Low battery.
3. Bad connection between
electrodes and patient skin.
4. Loose connection between lead
cables and the device's plug.
5. Bad connection between
electrodes and lead cables.
1. Use alcohol of high quality.
2. Clean electrode slice and the skin
under the electrode with alcohol.
3. Charge the battery.
Baseline draft
1. Low power.
2. Patient movement.
1. Charge the battery.
2. Keep patient still.
Unclear
waveform
1. Low battery.
2. The printer head surface is
dirty.
3. The thermal paper problem.
1. Charge the battery.
2. Cut off the power, clean the printer
head with alcohol, air dry.
3. Replace the thermal print paper with
specified one.
