Duo™ Operating Instructions 0070-10-0603-01 2 - 15
Operation Information Codes and Error Codes
NELLCOR SPO2 E40 SPO2 INTERFERENCE Noise is detected on the pulse signal
preventing pulse discrimination from the
noise. The interference may be due to
motion, excess infrared light or electrical/
optical interference.The message is
removed when the noise is removed.
E41 SPO2 CHECK
SENSOR
The Nellcor module senses an unstable or
illegal sensor. This may also be due to a
poor connection or a bad sensor. The user
is required to reconnect the same sensor
or connect a new sensor. The message is
removed once the Nellcor module clears
the error.
E43 SPO2 WEAK PULSE A pulse rate can not be determined and
all other measurement conditions are
normal. The message is removed when a
pulse is detected.
E44 SPO2 WEAK SIGNAL Noise is detected but a pulse rate can not
be discriminated. The message is removed
when a pulse is detected.
E46 SPO2 MOTION Motion is detected. The message is
removed when No Pulse status is detected
or when motion ceases.
E47 *SPO2 TIMEOUT SpO2 has been determined continuously
for more than 2 minutes, so SpO2 data
has timed out from the display.
E34 PR EXCEED PR value exceeds the measurement range.
GENERAL/
TECHNICAL
E501 BAT. VOLTAGE LOW Battery voltage is low.
MESSAGE TYPE CODE DESCRIPTION REASON
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