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Glow and infrared-ray
emission tube
Glow and infrared-ray
receipt tube
3.2 Caution
1. The finger should be placed properly (see the attached illustration of this
manual Figure 5), or else it may cause inaccurate measurement.
2. The SpO
sensor and photoelectric receiving tube should be arranged in a
2
way with the subject's arteriole in a position there between.
3. The SpO
sensor should not be used at a location or limb tied with arterial
2
canal or blood pressure cuff or receiving intravenous injection.
4. Make sure the optical path is free from any optical obstacles like
rubberized fabric.
5. Excessive ambient light may affect the measuring result. lt includes fluores-
cent lamp, dual ruby light, infrared heater, direct sunlight, etc.
6. Strenuous action of the subject or extreme electrosurgical interference
may also affect the accuracy.
7. Testee can not use enamel or other make up.
Figure 1. Operating Principle
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