Dräger Medical AG & Co. KGaA 6173.3
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Function description Babylog 8000
4.6 Minute Volume Monitoring (Babylog 8000/Babylog 8000 plus)
The abbreviation MV (for minute volume) is used in the following text.
4.6.1 Babylog 8000 with Software Versions 2 and 3
The monitoring menu is used to set the upper and lower alarm limits in the range of 0.03 L/min to
15 L/min. The upper and lower alarm limits are continuously compared with the measured MV value. If the
value exceeds the upper alarm limits or falls below the lower alarm limit, the system will activate an alarm.
Monitoring is deactivated during calibration of the flow sensor (Babylog 8000) to allow the measured MV
value to stabilize. If the flow measurement system fails, the MV monitoring becomes ineffective.
4.6.2 Babylog 8000 Software with Version 4.0 or Higher
The monitoring menu is used to set the upper and lower alarm limits in the range of 0.00 L/min to
15 L/min. The upper and lower alarm limits are continuously compared with the measured MV value. If the
value exceeds the upper alarm limits or falls below the lower alarm limit, the system will activate an alarm.
Monitoring is deactivated during calibration of the flow sensor (Babylog 8000) to allow the measured MV
value to stabilize. If the flow measurement system fails, the MV monitoring becomes ineffective.
4.6.3 Babylog 8000 plus
Babylog 8000 plus has the software 5.n.
4.7 Audible Alarm Generator Monitoring
Babylog has two audible alarm generators (loudspeaker and piezo). During normal operation, the
loudspeaker is the audio interface to the operator in the event of alarms. The piezo is only used in the
event of power or loudspeaker failure.
At the end of the self-test, the loudspeaker is triggered with a test signal. This test signal is monitored with
a microphone. If there is no feedback, Babylog generates error 817.
4.8 Operating Voltage Monitoring
During operation, Babylog uses comparators to continuously monitors whether the operating voltages are
within specified limits.
When Babylog is switched on, these comparators are checked by a defined changing of the comparator
reference voltage.
4.9 Rotary Potentiometer Monitoring
Input via rotary potentiometers are processed by two channels. Two microprocessor systems read the
input via independent channels and compare the results.
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