Philips M3000A, Service Manual

Page: 65 / 293

Sidestream CO
2
Measurement
Introduction to the Instrument 49
Sidestream CO
2
Features
This illustration shows the user controls on the Server and the connector for appropriate
tubing for the sidestream CO
2
measurement on the Extension.
Sidestream 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,
calculates medical parameters and exchanges information with the Server via FELP.
• 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
sidestream CO
2
tubing.
0
40
C
a
lib
ra
ti
on
Ma
rk
s
W
a
ve R
ang
e
CO
2