Novametrix Medical Systems MARS PO2 TECH 2001, Руководство по обслуживанию

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Rev. 01 Model 2001 Service Manual
5
Section 2
Introduction
This manual describes the use and operation of the Model 2001 Pulse Oximeter Monitor from
Novametrix Medical Systems Inc.
Model 2001 is a lightweight, easy to use, pulse oximeter designed to be used in a variety of
clinical settings. It provides reliable measurement, display and alerts for functional pulsatile
oxygen saturation (SpO
2
) and pulse rate. The monitor can be powered from the AC Mains (line
voltage) or from its rechargeable internal battery.
Numerical and waveform information is presented on a bright Cold Cathode Display (CCD) with
user adjustable contrast to optimize viewing angles. A simple menu system allows user
selection of measurement and display options. Alerts are menu programmable or automatic.
Numerical and plethysmogram displays are continually updated. Presence of a pulse is
indicated audibly by a user selectable “beep”.
Separate 24 hour trends for SpO
2
and pulse rate are updated every 8 seconds. In addition,
trend “events” and audible alarm status (Audio Off) are stored in trend memory.
The monitor is equipped with an RS232 serial output port for easy interfacing to external
equipment. An optional Analog Output module provides analog outputs.
Per requirements of IEC 601-1, the Model 2001 is classified as class II equipment, with type BF
applied part, and an enclosure protection rating of IPX0. The Model 2001 is Year 2000
compliant.
SpO
2
Principles of Operation
Model 2001 measures oxygen saturation and pulse rate with sensors that contain red and
infrared light sources, called LEDs. Since oxygen saturated blood absorbs different amounts of
light at each wavelength (red and infrared) as compared to unsaturated blood, the amount of
light absorbed by the blood in each pulse can be used to calculate oxygen saturation.
The light energy from red (660 nm) and infrared (940 nm) LEDs is beamed through a sample
cell, such as a pulsating vascular bed—the patient’s finger or toe, for example. The remaining
light energy not absorbed by the sample cell reaches a light receptor, called a photodiode, on
the opposing side of the sensor. The data received at the photodiode is sent back to the monitor
where it is split into its red and infrared components, digitized, processed by a microprocessor
chip, and finally displayed as a numerical value for oxygen saturation and a plethysmogram.