Section 5 - Operation
Oxygen Monitoring
Overview
Inspiratory oxygen concentration is measured with a dual galvanic cell
sensor which is attached to the inspiratory valve dome. The sensor
works by taking in oxygen, which initiates an electrochemical reaction
within the oxygen sensor. The oxygen monitor reads the voltage
produced by this reaction and translates it into an oxygen concentration
measurement. The sensor incorporates two independent electrochemical
cells (or sensor halves), and the oxygen monitor averages the signals
produced by the cells.
CAUTION: Never remove an oxygen sensor from its housing, except to
replace it. If a sensor is removed from its housing, you
must do the following before continuing normal operations:
• Reinstall the sensor in the housing.
• Wait for a period equal to the time that the sensor
spent outside the housing.
• Calibrate the sensor.
NOTE: When the machine is not in use, remove the oxygen sensor
assembly from the inspiratory valve dome, and insert the
inspiratory valve dome plug into the inspiratory valve dome.
5-10-1
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