Trend And Event Memories - Nellcor N-200 Operator's Manual

Guide to Operation

Trend and Event Memories

Determining Whether Memories Are Enabled
To determine if trend or event memories are enabled, press
HIGH SAT, HIGH RATE, and AUDIO ALARM OFF buttons
simultaneously. If trend and event memories are disabled,
t E dis appears in OXYGEN SATURATION and PULSE
RATE displays. If trend and event memories are enabled,
t E on appears in the displays.
Setting the Clock
Before storing data in the memories initially, set the internal
clock as described below.
1. Press and hold the LOW SAT and HIGH RATE buttons
simultaneously. The flashing numbers in the OXYGEN
SATURATION display are the last two digits of the
existing year. While pressing and holding the buttons, turn
the control knob until the display shows the correct year.
Release the buttons and repeat this step for month, day,
hour, and minute.
Note:
The N-200 sets the year, month, day, hour, and minute
sequentially. If more than 5 seconds elapse between any of
the steps listed above, the changes made so far are stored
and the N-200 starts the sequence again (beginning with
year).
2. Allow at least 5 seconds to elapse; check settings by
pressing the LOW SAT and HIGH RATE buttons
simultaneously, five times in succession.
Trends
Oxygen saturation and pulse rate measurements are sampled
every second and the average of the sampled values is
computed every 5seconds. That average is then stored in the
trend memory. Up to 12hours of this data can be stored. Both
trend and event data can be printed in graphic form with either
high or low resolution, or output to an external device capable
of printing ASCII characters or processing and formatting data.
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Day and minute settings appear in the PULSE
RATE display.