624074/07 4-15
4.3.2.4 CO
2
sensor/adapter zero calibration
CAUTION
• Always calibrate the CO
2
sensor with the air-
way adapter installed.
• DO NOT close both connectors of the airway
adapter with your fingers.
NOTE:
•The CO
2
sensor and airway adapter must be
removed from the patient circuit and connected to
each other during the CO
2
sensor/adapter calibra-
tion.
•The CO
2
sensor/adapter calibration requires a CO
2
sensor be installed, the CO
2
hardware be activated
(see Appendix J, Configuration), and that CO
2
moni-
toring be enabled.
• Wait at least 2 minutes to perform the CO
2
sensor/
adapter calibration after removing the adapter from
the patient’s airway. This time allows any CO
2
remaining in the adapter to dissipate and provides
best results for the test.
• If you close the
Tests & calib
window when the
calibration has failed, the device continues ventila-
tion but displays
CO
2
sensor calibration
needed
. This may result in inaccurate monitoring.
• To calibrate the sidestream sensor disconnect the
adapter from the patient circuit.
Description: The CO
2
sensor/adapter zero calibration com-
pensates for the optical differences between airway adapters
and for sensor drift.
Procedure:
1. Connect the CO
2
sensor with adapter to the ventilator
(Figure 4-4). Do not connect the adapter to the patient
circuit. Place the sensor with the adapter installed away
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