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2.4 Humidity Check

Turn on the Girae unit and verify that the Servo Humidity icon is on the screen. Set the Humidity to 65%. Wait

for 4 minutes. If no alarms are seen (except for a possible “Add Water” message) the humidier is operational.

NOTE: It is not necessary to have water in the reservoir to perform this test.

2.5 Servo Controlled Oxygen Check

2.5.1 Leak Check

This test checks for leaks between the O2 sensors and the Heat sink vent tting.

1. Remove translation deck, tilt platform, upper pan, and fan.

2. Cover the heat sink vent near the fan shaft with adhesive tape. Make sure the tape will not interfere with

fan rotation. Reinstall the fan, upper pan, tilt platform, and 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.

3. Power up the unit, hold down the ‘Air curtain’ button and press the ‘Down’ button to force the Girae into

low fan speed.

4. Set O2 set point to 21%; the display will show the actual concentration in the larger numerals next to the

set point. Open the doors until the actual concentration reaches 21% (ambient).

5. Run the Servo O2 calibration routine and wait for the calibration complete message. 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 tting has a leak or is disconnected. Repair the leak and repeat steps 1

through 4 of this procedure.

6. After performing the test, power o the unit. Remove the translation deck, tilt platform, upper pan, and the

fan, and remove the adhesive tape. Be sure to remove any residue on the heat sink left by the tape.

7. Reassemble the system and run the calibration routine one nal time.

2.5.2 Pre-use Checkout

This test checks for leaks between the chassis vent tting and the O2 sensors.

1. Connect an acceptable hose from an oxygen supply to the oxygen inlet tting on the unit. Supply pressure

should be between 310 kPa (45 PSI) and 586 kPa (85PSI).

2. Power up the unit.

Chapter 2: Service Checkout

Brand

Model

Giraffe OmniBed

GE Giraffe OmniBed Service Manual

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