getemed VitaGuard VG2100, Руководство по эксплуатации

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56 Preparing for heart rate and apnea monitoring
The basal impedance slowly falls for the first few hours after the
electrodes have been attached. This is caused by a reduction in the
impedance at the electrode-skin interface.
The displayed basal impedance should be less than 1000 Ý. If not,
wait for about fifteen minutes. When the basal impedance has still
not fallen, you should use new electrodes.
When the displayed basal impedance does not lie within the specified
range or when false alarms frequently occur, the doctor or the medi-
cal caregivers should observe the instructions in the section
“Changing the ECG lead for signal optimization” on page 100.