GE Giraffe Blue Spot PT Lite - Page 18

8. Allow the Girae Blue Spot Pt Lite to warm-up 5 minutes.
9. Using a calibrated Biliblanket Light Meter II, measure the light at the 5 points indicated in Figure 2-1
and calculate their average. Conrm that the average is at least 27 μW · cm
-2
· nm
-1
. If not, refer to
symptom OS4 on Chapter 4.
1
3
2
4
5
3.5”
3.5”
3.5”3.5”
Figure 2-1 Light Measurement Points
10. Divide the lowest reading by the highest reading. If the LED light is functioning properly, the result
should be greater than 0.4. If the result is not greater than 0.4, contact service.
NOTE: IEC standards recommend LED module replacement at 25% output reduction, which corresponds
to 27 μW · cm
-2
· nm
-1
and occurs at approximately 10000 hours. However, sucient irradiance for
eective phototherapy continues well after 25% reduction
18
Chapter 2: Product Setup and Operation