Pulsoximetro oxy-2 oxy-2 finger oximeter oxymèTRE DE POULS oxy-2

Storage Environment

a) Temperature: -40°C~+60°C

b) Relative humidity: ≤95%

c) Atmospheric pressure: 500hPa~1060hPa

Operating Environment

a) Temperature: 10°C~40°C

b) Relative Humidity: ≤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 per-

spective clamp finger-type sensor. 

Then measured signal can be obtained by a photosensi-

tive element, information acquired through which will be 

shown on screen through treatment in electronic circuits 

and microprocessor.

 

ENGLISH 

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24

Figure 1. Operating Principle

3.2 Caution

1. The finger should be placed properly (see the at-

tached 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 arteri-

ole 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 electro-

surgical interference may also affect the accuracy.

7.  Testee can not use enamel or other makeup.