Comen N10 - Zeroing the CO Sensor; Zeroing the Masimo CO; Module; Zeroing the Respironics & Comen Mainstream CO

CO
2
Monitoring
15-9
the patient’s respiratory gas, which leads to an incorrect reading.
NOTE
 To prevent the condensed water from dropping into the gas sampling tube and blocking it, the gas
sampling tube connection end of the airway adapter should point upwards.
15.6 Zeroing the CO
2
Sensor
WARNING
 If the alarm message "CO
2
Need Zero" appears directly after zeroing, please zero again before use.
15.6.1 Zeroing the Masimo CO
2
Module
The Masimo CO
2
sensor performs auto zeroing by switching the gas sample source from respiration circuit to
ambient air. Auto zeroing starts after the sensor reaches its working temperature (usually 30min after startup) and
is performed then every 24 hours. The Masimo CO
2
sensor finishes auto zeroing within 3s.
15.6.2 Zeroing the Respironics & Comen Mainstream CO
2
Module
In order to eliminate the effect of baseline drift on measurement results and obtain accurate measurement results,
please zero it before using the CO
2
module to monitor the patient, by the following method:
1) Connect the CO
2
module to the monitor.
2) After preheating, connect the sensor to the airway adapter.
3) Expose the sensor to room air and keep it away from all CO
2
sources, including a ventilator, patient's breath
and user's breath.
4) Select the CO
2
parameter area or waveform area to enter [CO
2
] menu.
5) Select [Zero] to zero the CO
2
sensor, and the message [Zeroing…] will be displayed on the screen; after zero
calibration, the corresponding message will also be displayed on the screen.
15.6.3 Zeroing the Respironics & Comen Sidestream CO
2
Module
1) Connect the sampling line to the CO
2
module.
2) After preheating, expose the sampling line to room air and keep it away from all CO
2
sources, including a
ventilator, patient's breath and user's breath.
3) Select the CO
2
parameter area or waveform area to enter [CO
2
] menu.
4) Select [Zero] to zero the CO
2
sensor, and the message [Zeroing…] will be displayed on the screen; after zero
calibration, the corresponding message will also be displayed on the screen.