Patient Monitor User’s Manual
5-10
5.7 CO2 Zero
While zeroing is recommended the first time the monitor
is connected to the filter, it is only absolutely necessary when the
message “Zero Required” is displayed.
Follow these steps:
1) Ensure that the sampling tube is not connected to the
patient or close to any source of CO2 (including the
patient's, your own, exhaled breath and ventilator exhaust
valves).
2) Select 【Menu】→【 System】→【 Maintenance】, enter
password.
3) Select 【Machine Mainten.】→【 CO2 Setup】→【 CO2
Zero】,The unit zeroes the module and displays the Zero
In Progress message for approximately 15-20 seconds.
The message disappears upon completion of the zeroing.
Caution:
Always ensure that the filter is properly connected to
the CO2 connector before zeroing.
Do not attempt zeroing for 20 seconds after removing
the sampling tube from the patient’s airway. This time
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