Nellcor N-395 Operator's Manual page 27

The battery may discharge during prolonged storage or shipment.
If the monitor has been in storage for more than 2 months, it is
important to plug the monitor into an AC outlet and allow the
battery to charge for approximately 30 minutes before attempting
to operate the instrument on AC power.
To charge a low battery, connect the monitor to AC power. A
full charge of a completely discharged battery takes 14 hours
while the monitor is turned off.
1. Place the N-395 on a flat surface near the patient. With the
optional wall mount plate available from Mallinckrodt, the
monitor may be attached to a GCX Poly-mount bracket.
2. Plug the female connector end of the power cord into the rear
of the monitor. Use only the hospital-grade power cord
provided by Mallinckrodt.
3. Plug the male connector end of the power cord into a
properly grounded AC outlet.
4. Verify that the AC Power Indicator is lit. If it is not, ensure
that the supply voltage selector switch matches your AC
voltage source. If the indicator still does not light, contact
qualified service personnel, your local Mallinckrodt
representative, or the Mallinckrodt Technical Services
Department.
5. Select a Nellcor sensor appropriate for the patient to be
monitored (see the Sensors and Accessories section of this
manual for sensor selection information).