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2.4 Umgebungsanforderungen
Lagerung
a) Temperatur:-40°C~+60℃
b) Relative Feuchtigkeit :≤95%
c) Atmosphärischer Druck: 500hPa~1060hPa
Betriebsumgebung
a) Temperatur: :10℃~40℃
b) Relative Feuchtigkeit :≤75%
c) Atmosphärischer Druck: 700hPa~1060hPa
3 PRINZIP UND VORSICHTSMASSNAHMEN
3.1 Messprinzip
Das Oxymeter funktioniert folgendermaßen: Das Messprin-
zip beruht auf dem Lambert-Beer-Gesetz. Dabei wird die
spektrumabsorbierende Charakteristik des reduktiven Hämo-
globins (Hb) und Oxyhämoglobins (HbO2) in den Nah-Inf-
rarot-Zonen erfasst. Funktionsprinzip des Instruments: Es
kommt die photoelektrische Oxyhämoglobin-Messtechnik zu-
sammen mit der Kapazitätspulsmessung und Aufzeichnungs-
technik zum Einsatz. Zwei Lichtstrahlen mit unterschiedlichen
Wellenlängen werden über einen Klammersensor durch die
Fingerspitze geleitet. Das gemessene Signal wird von einem
photosensitiven Element empfangen. Die Elektronik und der
Mikroprozessor des Geräts verarbeiten die Signale und zei-
gen die Ergebnisse auf dem Display des Geräts an.
Abbildung 1. Betriebsprinzip
Glüh- und Infrarot-
Emissionsschlauch
Glüh- und Infrarot-
Empfängerschlauch
DEUTSCH
8


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