Servo Controlled Oxygen Alarm Messages - GE Giraffe Service Manual

Item Description
oxygen1 Oxygen reading in percent from second sensor cell:
sensor0 Voltage output in millivolts from first sensor cell.
Voltage output in millivolts from second sensor cell.
NOTE: The following information applies to the oxygen0, oxygen1, sensor0, and sensor1 values:
sensor1
• For software version 1.40 or previous versions, 23 mv - 280 mv = 21% - 100% O2.
• For software version 1.50 or later versions, 5 - 90 mv = 21 - 100% O2.
Temperature in degrees Celsius read from a sensor inside the sensor housing located beneath
temp
the bed. Refer to temperature to resistance curve in the Tips section 4.7.3.4.
Relative humidity in percent read from a sensor inside the sensor housing located beneath the
humidity
bed.

4.7.2 Servo Controlled Oxygen Alarm Messages

Alarm Message Meaning
Sensor1 reading
is > 3% below the
Low Oxygen oxygen set point
7 minutes after a
set point change.
Sensor1 reading
High Oxygen more than 3%
above set point
© 2001 by Datex-Ohmeda, Inc.. All rights reserved.
Cause
Low O2 supply
pressure or flow.
Inlet screen occluded.
Air leaks into infant
compartment.
Supply Valve not
opening.
End cap safety valve
not opening.
Calibration valve is not
closing.
Infant compartment
vents occluded.
Oxygen set point
recently lowered.
Supply valve(s) not
closing.
Chapter 4: Troubleshooting
Action
Be sure supply is greater than 45psi (310 kPa)
and flow rate is greater than 45 L/min. If flow
rate is <45 check that the inlet screen in the
regulator is not occluded.
Clean or replace screen.
Be sure all doors and portholes are closed
Check supply valves. Refer to the Tips section
4.7.3.1.
Check valve and spring assembly. Refer to
the Tips section 4.7.3.
Check the calibration valve. Refer to the Tips
section 4.7.3.2.
Check to be sure that the two vents in the
infant compartment under the bed are not
occluded.
Allow time for oxygen level to drop.
Check supply valves and kinked hoses. Refer
to the Tips section 4.7.3.1.
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