Comen C80 - Zero calibration of sensor

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16.9.4 Sterilization Times for Reusable Airway Adapter
The reusable airway adapters can be reused 100 times if the above sterilization method is used.
16.9.5 Zeroing
Please zero before monitoring CO
2
; zeroing is to eliminate the effect of baseline drifting on the
results during measurement, thus ensuring the correctness of measured results.
Usually, the module will zero itself automatically when necessary. The user can zero the module
manually when the user considers it necessary: Select [CO
2
] in the parameter area, in the [CO
2
Settings] menu popping up, select [Zeroing] to zero the CO
2
module. During zeroing, make sure
that the patient circuit is exposed to the ambient air (21% oxygen and 0% CO
2
) for approximately
30 seconds; when the 30s zeroing prompt on the screen ends, it means zeroing is completed.
16.10 PHASEIN Branded Mainstream and Sidestream Analyzer
Related Information
16.10.1 Zeroing
An infrared gas analyzer needs to determine the zero reference level for CO
2
measurement. This
zeroing standard is called as “zeroing” here.
Automatic Zeroing
The ISA sidestream gas analyzer execute zeroing automatically by switching the gas sample from
the respiration circuit to the ambient air. To execute automatic zeroing once every 24 hours, the
ISA sidestream gas analyzer takes less than 3 seconds. If the ISA sidestream gas analyzer is
equipped with an oxygen sensor, automatic zeroing also includes the indoor air calibration of the
oxygen sensor.
Manual Zeroing
Select [CO
2
] in the parameter area, in the [CO
2
Settings] menu popping up, select [Zeroing] to
zero the CO
2
module. During zeroing, make sure that the patient circuit is exposed to the ambient
air (21% oxygen and 0% CO
2
) for approximately 30 seconds; when this menu is in a non default