15-3
15.2.2 Preparations for CO
2
Measurement
1. Plug the water trap into its receptacle before the measurement.
2. Open the CO2 SETUP menu and set WORK MODE to MEASURE. The “CO2 START
UP” prompt information is displayed on the screen until the startup is finished.
3. After the module start-up, the “CO2 WARM UP” prompt information is displayed on the
screen. At this time, the module is in the Warming–up status.
4. After the module warm-up, the module enters the Ready-to-measure status.
When the monitor is powered on for the first time, the CO
2
module enters the STANDBY mode
by default. To activate the CO
2
module, you must change the work mode to MEASURE. The
work mode of the CO
2
module keeps unchanged when the monitor is restarted. For instance, if
the monitor is power off when the CO
2
module is working in the MEASURE mode, the CO
2
module will automatically enter the MEASURE mode after the monitor is restarted. For details
about WORK MODE, please refer to the section Other Setup in 15.2.3CO2 .
Figure 15-2 CO
2
Module Airway Connections
The measure CO
2
concentration can be compensated in two ways:
ATPD (Ambient Temperature and Pressure, Dry Gas);
BTPS (Body temperature and pressure, Saturated);
ATPD means the CO
2
value is measured in ambient temperature and pressure and dry gas, while
BTPS means the CO
2
is measured at a temperature of 37℃, a relative humidity of 95% and a
47mmHg (pH2O) partial pressure of moisture.
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