Nihon Kohden Corporation ZM-531PA Benutzerhandbuch

72 

Operator’s Manual  ZM-520PA/521PA/530PA/531PA

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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