Servo Controlled Oxygen Alarm Messages - GE Giraffe OmniBed Service Manual

Chapter 4: Troubleshooting
Item Description
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 the bed.
temp
Refer to temperature to resistance curve in the Tips section (4.7.3).
humidity Relative humidity in percent read from a sensor inside the sensor housing located beneath the bed.

4.7.2 Servo Controlled Oxygen Alarm Messages

Alarm Message Meaning
Sensor1 reading
is> 3% below the
oxygen set point
7 minutes after a
Low Oxygen
set point change
or the OmniBed
canopy was
closed.
Sensor1 reading
High Oxygen more than 3%
above set point
66
Cause
Low O2 supply pressure or
flow.
Inlet screen occluded.
Air leaks into infant
compartment.
Supply Valve not opening.
Endcap safety valve not
opening.
Calibration valve is not
closing.
Infant compartment vents
occluded.
Oxygen set point recently
lowered.
Supply valve(s) not closing.
6600-0343-000 104
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).
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).
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).
© 2001 by Datex-Ohmeda, Inc.. All rights reserved.