Service manual

2. TROUBLESHOOTING
Service Manual CNS-9701 2.5
Measurement Value
Alarm
Trouble Possible Cause/Criteria Action
Waveform too large or too small
QRS detection threshold is
changed.
Adjust the QRS detection sensitivity.
QRS and pacemaker spikes are not
distinguished.
Turn pacing detection ON.
Heart rate is not counted
correctly.
QRS detection is set to “Manual”. Set QRS detection to “Auto”, or confirm
that the QRS detection lead and threshold
in manual detection are set properly.
Arrhythmia is not measured
correctly.
ECG learning is not correct. Relearn patient’s ECG.
Heart rate and arrhythmia are
not measured correctly.
ECG lead that is inappropriate for
analysis is selected.
Change the ECG lead used for analysis.
Noise on the ECG waveform Hum interference on the ECG
waveform.
Set the hum filter to ON.
The ST value is inaccurate. The ST analysis point is not set
properly.
Confirm that the ST analysis point setting
is properly set for ST analysis.
Waveform too large or too small
Respiration sensitivity is changed.
Set the proper sensitivity.
Respiration is not measured
correctly.
Respiration measurement is set to
OFF.
Turn the respiration measurement ON.
Trouble Possible Cause/Criteria Action
Each alarm setting of the Personal
Setup is set to OFF.
Turn the alarms ON for the bed.
Arrhythmia analysis is turned OFF
at the bedside monitor and/or
central monitor.
Turn arrhythmia analysis ON on both the
bedside monitor and central monitor.
No alarm.
AllalarmsaresettoOFFatthe
bedside monitor.
Turn all alarms ON at the bedside monitor.
This operation cannot be done at the
central monitor.
All alarms for a bed cannot be
turned ON/OFF together.
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This operation is not available at the
central monitor.