Dräger Primus Instructions For Use Manual page 26

Before first use
Before first use
Insert the enclosed O2 sensor, page 147. (Not applicable for
consumption-free O2 measurement (optional).)
Insert the flow sensors, page 140.
Charging the battery for emergency operation
Primus has a built-in uninterruptible power supply UPS which
maintains the power supply for at least 30 minutes (up to
90 minutes, depending on the ventilation parameters) in the
event of a mains power failure, provided that the battery is
charged.
Switching to battery power UPS takes place automatically and
is indicated on the screen by the message: POWER FAIL.
The battery recharges automatically when the workstation is
plugged into the mains, but only up to a maximum ambient
temperature of 35 °C.
The battery must be charged for 10 hours before using the
workstation for the first time:
@ Plug the mains plug of the Primus workstation into the
mains socket. The mains voltage must correspond to that
specified on the rating plate.
The green LED »2-« lights up.
@ Leave Primus connected to the mains for 10 hours. The
workstation does not have to be switched on.
The devices connected to auxiliary power sockets will not
be powered by the UPS in the event of a power failure.
When Primus is not in use
@ The battery must be charged at least every 4 weeks.
Allowing it to run low can lead to damage.
If Primus is not used for an extended period:
© Unplug the medical gas hoses from the wall supply points
of the central gas supply.
@ Close the cylinder valves on the backup gas cylinders.
@ Leave the workstation connected to the mains at all times.
1 The green LED »-©« lights up.
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Instructions for Use Primus SW 2.n