Dräger Babylog VN500 Instructions For Use Manual page 108

Operation
Display of power supplies
Power supply is indicated on the front of PS500.
A
A LED for mains power:
– Lights green when mains power is applied
– If the LED does not light up, the device is
disconnected from the mains power
B LEDs indicate the state of charge of the
internal batteries. See "Charge indication on
PS500" on page 108.
C LED indicates a fault.
Operating time of internal batteries
The operating time depends on the following fac-
tors:
– State of charge
– Age
– Number of charging cycles
If the batteries are fully charged and new, and ven-
tilation is typical, the operating time is at least
100 minutes.
Observe the maintenance intervals.
Charging internal batteries
The internal batteries are recharged when PS500 is
supplied with mains power and is not switched off
via the toggle switch on PS500.
CAUTION
Leave PS500 connected to the mains power sup-
ply for at least 8 hours so that the internal batter-
ies can be fully charged.
108
Charge indication on PS500
The state of charge of the internal batteries is indi-
cated on the front of PS500.
Symbol
C
B
Mains power operation
When supplied with mains power, PS500 switches
to mains voltage operation. The internal batteries
are charged at the same time. The last LED in the
charge indicator of PS500 flashes to indicate the
charging process.
Operation with internal batteries
If the mains power supply fails, PS500 switches
over (without interruption) to the internal batteries.
The state of charge of the internal batteries is re-
duced when the device switches over to the internal
batteries. The LED
PS500 no longer lights up.
When the state of charge of the internal batteries is
below 20 %, the charge indicator on PS500 flashes
red.
Reestablish the mains power supply immediately to
avoid an interruption of the ventilation functions.
Recharge the battery after power supply with the in-
ternal batteries of PS500. Reestablish the mains
power supply immediately.
Instructions for Use Infinity Acute Care System – Babylog VN500 SW 2.n
State of charge
90 to 100 %
60 to <90 %
40 to <60 %
20 to <40 %
<20 %, flashes red in 1-second inter-
vals
Internal batteries defective or no in-
formation on the battery charge state
available, or toggle switch is in the
(off) position
for mains power (A) on