GE Giraffe Blue Spot PT Lite, Operation, Maintenance And Service Manual

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8.4.2 Functional Checks
1. Move the light pipe to verify that it moves freely and stays in position.
NOTE: The light pipe will typically experience some minor deflection (less than 1.3cm) after positioning.
2. Plug the power cord into the power outlet. Confirm that the hour meter display turns on and the
standby/on indicator illuminates in green.
3. Press and release the standby/on switch, and confirm the over-temperature/under-temperature red
indicator flashes briefly and the standby/on indicator changes to blue.
4. Confirm that the fan is operating by momentarily placing your hand close to the exhaust vent when
the device is on to feel the air flow coming out of the device.
5. Confirm that the therapeutic light is on.
WARNING :
Never look directly at the light. Exposure can cause eye damage.
8.4.3 Light Intensity Check
In order to ensure uniform light distribution and the performance of all the optical components, perform
the following procedure.
1. Turn on the system.
2. Focus the light so that the spot diameter is 35.5 cm (14”) or when the shade is 38 cm (15”) from the
bed surface.
3. Using a calibrated Biliblanket Light Meter II, measure the light at the 5 points indicated on the below
diagram and calculate their average. Confirm that the average is at least 27
µ
W · cm
-2
· nm
-1
. Refer to
symptom S11 in Chapter 10 for troubleshooting.
NOTE: IEC standards recommend LED module replacement at 25% output reduction, which
corresponds to 27
µ
W · cm
-2
· nm
-1
and occurs at approximately 10000 hours. However, sufficient
irradiance for effective phototherapy continues well after 25% reduction.
1
3
2
4
5
3.5”
3.5”
3.5” 3.5”
53
Chapter 8: Service Maintenance and Checkout