Mainstream CO
2
Measurement
Introduction to the Instrument
57
Mainstream CO
2
Features
This illustration shows the user controls on the Server and the connector for the mainstream
CO
2
measurement transducer on the Extension. The parts are described in the paragraphs
following the illustration:
Mainstream CO
2
Wave
The two calibration marks are located at 10% and 60% of wave channel height. The lower
calibration mark is labelled 0 mmHg (0.0 kPa) on all scales. The upper one is adjustable from
20 mmHg (2kPa) to 100 mmHg (13 kPa) in steps of 10 mmHg (1kPa).
Measurement Mode
In the measurement mode, the Extension continuously measures CO
2
concentration and
calculates medical parameters.
• N
2
O Correction—This can be turned on or off. If N
2
O correction is off, only oxygen cor-
rection to CO
2
is made. In this case, it is assumed that the gas mixture consists mainly of O
2
and N
2
(respiratory intensive care unit conditions).
If N
2
O correction is on, oxygen and N
2
O correction to the CO
2
value is made. In this case,
it is assumed that the gas mixture consists mainly of O
2
and N
2
O (operating room condi-
tions).
Connector for a
mainstream CO
2
transducer.
0
40
Calibration Marks
Wave Range
CO
2
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