INSTRUCTION MANUAL FOR PULSE OXIMETER/
MANUAL DE USO PARA PULSIOXÍMETRO
Model/Modelo: PX-02
Operating Environment
a) Temperature: 10
℃
～
40
℃
b) Relative Humidity: 30%
～
75%
c) Atmospheric pressure: 700hPa
～
1060hPa
3 Principle and Caution
3.1 Principle of measurement
Principle of the Oximeter is as follows: An experience formula of data process is
established taking use of Lambert Beer Law according to Spectrum Absorption
Characteristics of Reductive Hemoglobin (Hb) and Oxyhemoglobin (HbO
2
) in glow &
near-infrared zones. Operation principle of the instrument is: Photoelectric
Oxyhemoglobin Inspection Technology is adopted in accordance with Capacity Pulse
Scanning & Recording Technology, so that two beams of different wavelength of lights
can be focused onto human nail tip through perspective clamp finger-type sensor. Then
measured signal can be obtained by a photosensitive element, information acquired
through which will be shown on screen through treatment in electronic circuits and
microprocessor.
Figure 1. Operating Principle
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
2
sensor and photoelectric receiving tube should be arranged in a way with
the subject
’s arteriole in a position there between
．
3. The SpO
2
sensor should not be used at a location or limb tied with arterial 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. It includes fluorescent lamp,
dual ruby light, infrared heater, direct sunlight and etc.
6. Strenuous action of the subject or extreme electrosurgical interference may also
affect the accuracy.
7. Testee can not use enamel or other makeup.
