Dräger Babylog VN Series, Manual

Page: 16 / 248

16 Supplement
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Evita V series / Babylog VN series
English
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Principles of operation
9 Principles of operation
9.1 Battery concept
9.1.1 General information
At the time of manufacture and delivery, batteries have a typical capacity which is in
accordance with the information specified in the battery manufacturer's data sheet.
The electrochemical composition of the battery is crucial for its total capacity. The
battery runtime is derived from this information (see "Technical data", page 13).
The capacity of batteries changes with increasing age and utilization.
All the following information and specifications refer to perfectly functioning
batteries. If batteries are faulty, the correct device function, e.g. battery charge
indication or alarms, may be impaired (see "Battery test", page 10).
9.1.2 Battery charge indication on the screen
The charge status indicator shows the available battery charge determined by the
electrochemical processes. When the batteries are, e.g., fully charged, this state is
indicated by a corresponding symbol.
The charge status indicator is a relative indication which is based on the
electrochemical properties of the battery. The charge status indicator is evaluated
on the basis of a battery model.
Battery runtime if mains power supply is not
available
Without GS500, with new battery 240 minutes
Without GS500, after 50 battery dis-
charge and charge cycles 230 minutes
With GS500, with new battery 120 minutes
With GS500, after 50 battery discharge
and charge cycles 115 minutes
Charging
Charging time (to charge battery fully) <5 hours (<4 hours for 80 % charge)
8.2 Operating characteristics (continued)
Symbol Battery charge
99 to 100 %
75 to 98 %
50 to 74 %
25 to 49 %
0 to 24 %, flashes red.
Batteries faulty or no information available on the battery charge.