Humidifier Check; Oxygen Leak Tests; Oxygen Leak Test; Vent Fitting To O2 Sensor Leak Test - GE Giraffe OmniBed Carestation CS1 Service Manual

2.2.3 Humidifier Check

To check humidifier operation:
1. Turn on the Giraffe unit and verify that the Servo Humidity icon appears on the screen.
2. Set the Humidity to 65%.
3. Wait for 4 minutes. If no alarms appear (except for a possible "Add Water" message), the humidifier is
operational.
Note: It is not necessary to have water in the reservoir to perform this test.

2.2.4 Oxygen Leak Tests

2.2.4.1 Oxygen Leak Test

To check if there is an oxygen leak:
1. Connect an acceptable hose from an oxygen supply to the oxygen inlet fitting on the device. Supply
pressure should be between 310 kPa (45 psi) and 586 kPa (85 psi).
2. Touch Oxygen and use the arrows to set Oxygen to 21%. The display will show the actual
concentration. Open the doors until the actual concentration reaches 21% (ambient).
3. Remove translation deck, tilt platform, upper pan, and fan.
4. Cover the heat sink vent near the fan shaft. You can use either adhesive tape or a short piece of
surgical tubing. Make sure the tape or tubing will not interfere with fan rotation. Reinstall the fan and
upper pan. It is not necessary to reinstall the tilt platform or translation deck.
Note: If the conical shaped rubber grommet was removed with the fan, when reinstalling fan, be sure that
rubber grommet clicks into groove on fan shaft.
5. Power up the unit.
6. Run the Servo O2 calibration routine from the setup menu, and wait for the calibration complete
message.
7. In approximately 20 seconds, the "Check O2 Supply" alarm should sound. If there is no alarm, the tubing
between the sensor housing and the heat sink vent fitting has a leak or is disconnected. Repair the leak,
and repeat steps 1 through 4 of this procedure.
8. After performing the test, power off the device. Remove the upper pan and the fan, and remove the
adhesive tape or surgical tubing. Be sure to remove any residue on the heat sink left by the tape or
tubing.
9. Reassemble the system, and run the calibration routine one final time.

2.2.4.2 Vent Fitting to O2 Sensor Leak Test

This test checks for leaks between the chassis vent fitting and the O2 sensors.
1. Connect an acceptable hose from an oxygen supply to the oxygen inlet fitting on the device. Supply
pressure should be between 310 kPa (45 psi) and 586 kPa (85 psi).
2. Power up the device.
3. Set the Air Mode set point to the desired temperature.
4. Wait for the air temperature to stabilize. This could take about 45 minutes, depending on your
circumstances. To reduce the wait time, it is advisable to set the temperature at or slightly above room
temperature.
Service Manual
Chapter 2: Installation and Service Checkout
Service Checkout
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