Chapter 4: Commissioning 39
Operation with internal battery
Battery operation means that the device is supplied with power by the internal battery.
If the device is supplied with power by the internal battery, the device automatically
switches off after two minutes if ventilation is not active.
Please note:
• The internal battery is solely intended to provide temporary power in the event of
outages in the mains supply and when changing the power source. It must not
be used as the primary power source for ventilation.
•
In battery operation, keep track of the battery power level and recharge it as needed.
• In order to ensure the full function of the battery, the battery must be maintained
in accordance with the “Battery maintenance” on page 83.
• In battery operation, the device cannot be operated with a humidifier.
Device operating times with a new, fully charged battery:
Battery power level Time Alarm
100 – 0% approx. 200 min -
> 20
1
– 0% approx. 35 min Low Internal Battery
approx. 5 – 0% approx. 5 min Internal Battery Empty
Measuring conditions:
Output volume Vdel = 800 ml, ventilation frequency f = 20 rpm
I:E ratio = 1:2, resistance R = 5 hPa (l/s)- ± 10%, compliance C = 50 ml (hPa)- ± 5%
The internal battery enables operation of at least 1 hour at maximum power consumption.
Ventilation failure!
If the alarm “Internal battery empty” occurs, the device will
switch off after 5 minutes.
Ö
Connect the device to an alternate power supply right away.
1 The display “Internal battery low” is shown at 20% of the battery’s rated value.
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