Fukuda Denshi DynaScope 7000 Series, Service Manual

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Perform equipotential grounding with the peripheral devices using the equipotential
ground terminal as necessary.
Cause 2 : The electrode contact is poor.
Electrical blanket or other noise source is near the patient.
Solution : Improve the position of the electrode.
・
Replace the lead cable if defective.
・
If any noise source is near the patient, move it away from the patient as much as
possible.
Cause 3 : EMG is interfering.
Solution :
・
Change the electrode site to a location where EMG will less likely to interfere.
・
Select ESIS for the filter mode.
Note : Selecting ESIS for the filter mode will decrease the QRS amplitude and may result in
miscount the heart rate.
The “Check Electrodes” message is displayed.
Cause : The electrode contact with the skin is poor. There is substantial contact resistance
between the electrodes.
Solution : Replace all the electrodes. Use the same type of electrodes.
The “ECG Unit Error” message is displayed.
Cause : A communication error with the ECG measuring circuit exists.
Solution : Broken wire or faulty ECG measuring circuit can be considered.
The measured data is displayed as “
×××
”.
Cause : The heart rate is outside the measurement range.
Solution :
・
Check the electrode application.
・
Replace the electrode, or check the lead cable.
Heart rate is not counted. Heart rate is too low.
Cause : The ECG waveform amplitude is below the QRS detection level (0.3mV).
Solution 1 : Change the electrode site, or select a lead with higher QRS amplitude.
Note
: Using 4-electrode or 5-electrode instead of 3-electrode allows more accurate QRS
detection.
Also, if large amount of noise is present, the noise may be erroneously detected as
QRS. It is recommended to change the electrode site and increase the ECG
amplitude.
Solution 2 : Increase the waveform size. By increasing the waveform size, small QRS wave will
become detectable. However, noise may also be detected.
Heart rate is not counted, and “Lead OFF” message 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 the electrode application.
・
Replace the electrode, or check the lead cable connection.
Artificial pacemaker pulse is not displayed.
Cause 1 : On the ECG setup menu, No is selected for the pacemaker use.
Solution
: Select Yes for the pacemaker use.
The “Pacemaker Error” message is displayed.
Cause : The pacemaker pulse of 16 pulses or more per second are detected.
A noise-generating source such as electric blanket is near the patient.
External noise is erroneously detected.
Faulty pacemaker pulse detection circuit can be considered.
Solution 1 : Ensure grounding is performed using the power cable with grounding wire.
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