Nellcor OXIMAX N-600X Series, Operator'S Manual

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Symbols, Controls, Displays and Indicators
N-600x Operator’s Manual 15
The N-600x algorithm automatically extends the amount of data
required for measuring SpO
2
and pulse rate depending on the
measurement conditions. During normal measurement conditions the
averaging time is 6 to 7 seconds. During conditions such as those
caused by low perfusion, interference (e.g., external interference like
ambient light), or a combination of these, the
N-600x algorithm
automatically extends the amount of data required beyond 7 seconds.
If the resulting dynamic averaging time exceeds 20 seconds, the pulse
search indicator is lit solid and SpO
2
and Pulse Rate will continue to
be updated every second. As these conditions extend, the amount of
data required continues to increase. If the dynamic averaging time
reaches 40 seconds, the pulse search indicator begins flashing, the
SpO
2
and pulse rate displays flash zeros indicating a loss-of-pulse
condition.
WARNING: Failure to cover the O
XI
M
AX
sensor site with opaque
material in high ambient light conditions may result in inaccurate
measurements.