User's Manual

16 - 7
16.7.2 Zeroing the Mainstream CO
2
sensor
For mainstream CO
2
modules, the sensor should be zeroed in the following conditions:
■ Before each measurement.
■ A new adapter is used.
■ Reconnect the sensor to the module.
■ The message CO2 Zero Required displays. In this case, check the airway adapter for any blockage, e.g.
mucus, etc. If a blockage is detected, clear or replace the adapter.
To zero the sensor, follow this procedure:
1. Connect the sensor to the module.
2. In the
CO2 menu, select Setup tab.
3. Set the
Operating Mode to Measure. The message CO2 Sensor Warmup is displayed.
4. After warm-up is finished, connect the sensor to a clean, dry airway adapter. The adapter should be vented
to the air and isolated from CO
2
sources, such as ventilator, the patient’s breathing, your own breathing, etc.
5. Select
Zero in the CO2 menu. The message Zeroing is displayed.
It takes about 15 to 20 seconds. The message disappears when the zero calibration is completed.
WARNING
• When perform a zero calibration during the measurement, disconnect the sensor from the patient’s
airway first.
• Please do not rely on the readings during zeroing.
16.8 Changing Settings for All CO
2
Modules
16.8.1 Changing CO
2
Alarm Settings
To change the CO
2
alarm settings, follow this procedure:
1. Select the CO
2
numeric area or waveform area to enter the CO2 dialog.
2. Select the
Alarm tab.
3. Enter the password if required. For more information, refer to
25.13.3Selecting Password for User
Authentication
.
4. Set alarm properties as desired.
16.8.2 Setting the CO
2
Waveform
To set the CO
2
waveform, follow this procedure:
1. Select the CO
2
numeric area or waveform area to enter the CO2 dialog.
2. Select the
Setup tab.
3. Set
Waveform Type, Speed and Scale or CO2 Scale of the CO
2
waveform.
16.8.3 Setting the RR Source
To set the respiration rate (RR) source, follow this procedure:
1. Select the CO
2
numeric area or waveform area to enter the CO2 dialog.
2. Select the
Setup tab.
3. Set
RR Source.