Fukuda Denshi DS-8400, Service Manual

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9-4

<ECG Unit Error> is displayed.
Cause
A communication error has occurred between the ECG measuring unit.
Solution
A failure of the ECG unit can be considered.

The measurement data is displayed as "xxx".
Cause
The heart rate is outside the measurement range.
Solution

Check if the electrodes are properly attached.

Replace the electrode, or check the lead cable and relay cable.

Heart rate is not counted. Heart rate is low.
Cause
The ECG waveform amplitude is below the QRS detection level (0.3 mV).
Solution 1
Change the electrode site, or select a lead with higher QRS amplitude.
 Using 4-electrode or 5-electrode instead of 3-electrode allows more accurate QRS
detection.
 Also, if large amount of noise is interfering, the noise may be erroneously detected
as QRS.Change the electrode site and increase the ECG amplitude.
Solution 2
Increase the displayed waveform size. By increasing the waveform size, small QRS wave will become detectable.
However, noise may be also detected.

Heart rate is not counted, and <LEAD OFF> is displayed.
Cause 1
The electrode of the displayed lead type is detached, or is not making good electrical contact with the skin.
Solution

Check if the electrodes are properly attached.

Replace the electrode, or check the lead cable and relay cable.
Cause 2
Even though the "3-lead Override" (ECG Parameter Setup) is set to [ON], electrodes other than L (LA), R (RA), F
(LL) are connected.
Solution
Set the "3-lead Override" to [OFF]. Or, detach the electrodes other than L (LA), R (RA), F (LL).

Artificial pacemaker pulse is not displayed.
Cause 1
[Not Used] is selected for "Pacemaker" on the "Admit/Discharge" menu.
CAUTION