Nellcor Oximax NPB-40 Operator's Manual page 20

Description of Controls, Indicators, and Symbols
Canadian/USA certification mark (electrical safety)
Russian regulatory approval
Serial number
These two symbols are located on the front panel of the
NPB-40.
Area of the display that displays the measured percent of
oxygen saturation.
Area of the display that displays the measured pulse beats
per minute.
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