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6.5 Troubleshooting
The following table summarises certain problems that may occur and the
relative causes.
Problem Cause
Isoelectric line drift
-
Use of electrodes other than originals Use
of electrodes in saturation
-
Insufficient electrode/skin contact
-
Electrode surface dirty
-
Patient moving
Interference from AC mains supply
-
Voltage generator too close; presence of
other clinical instruments (e.g. X-rays,
etc.)
-
Patient in contact with metallic parts or
with other persons
Muscle tremors
-
Patient not relaxed
-
Peripheral electrodes adhering too tightly
Irregular paper transport
-
End of paper roll
-
Paper roll incorrectly positioned
-
Use of non-original paper
Analysis impossible
Signal too unstable or noisy
No copy of trace
-
Wrong copy setup
-
Recording is interrupted before 10
seconds
-
“Real time” operation mode:
Manual
Autotimer
Arrhythmia
HRV
-
If the memory option is enabled, if the
device is off after the last acquisition.
Abnormal signal
-
Defective patient cable
-
Defective electrodes
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