Covidien Nellcor OxiMax N-600x Operator's Manual page 164

Using SatSeconds
156
When the indicator is filled, indicating that the SatSeconds
setting has been reached, an audible alarm sounds and the
displayed %SpO rate flashes. As with traditional alarm
2
management, the audible alarm may be silenced by pressing the
ALARM SILENCE button.
N-600x Operator's Manual