User's Manual

72 Operator’s Manual ZM-520PA/521PA/530PA/531PA
Message Cause Countermeasure
CANNOT
MEASURE*
Contact between the disposable
electrode and skin becomes poor.
Replace electrodes with new ones
immediately.
CHECK
ELECTRODES
Electrode lead is disconnected from
the electrode.
Firmly connect the electrode lead to
the electrode.
Electrode lead is disconnected from
the transmitter.
Firmly connect the electrode lead to
the transmitter.
Electrode lead discontinuity.
Replace the electrode lead with a
new one.
Electrode is not firmly attached to
the skin.
Replace the electrode with a new
one.
Polarization voltage is abnormally
high.
CHECK PROBE
The probe is not attached to the
patient properly.
Attach the probe to the patient
properly.
The probe is not attached at the
appropriate site.
Attach the probe to an appropriate
site indicated in the probe manual.
The probe is disconnected from the
transmitter.
Connect the probe cable to the
transmitter.
The probe is past its expiration date. Replace the probe with a new one.
CHECK PROBE
SITE*
The probe is not attached at the
appropriate site.
Attach the probe to an appropriate
site indicated in the probe manual.
The probe is deteriorated.
Replace the probe with a new one.
The probe is past its expiration date.
DETECTING
PULSE
Searching for the correct pulse wave
for SpO
2
monitoring.
Wait until the pulse wave is detected.
The SpO
2
value cannot be obtained
because the waveform is unstable.
Attach the probe to the patient
properly.
The probe is not attached to the
patient properly.
LIGHT
INTERFERENCE
The SpO
2
measurement site is under
fluorescent light, surgical light,
sunlight, or other strong light.
Cover the measurement site with a
blanket or cloth.
Considerable body movement. When the message is displayed
frequently, check the patient condition
and, if necessary, change the
attachment site.
The probe is not attached to the
patient properly.
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