Patient Monitor User’s Manual
5-11
allows any CO2 remaining in the sampling tube to
dissipate before zeroing.
Do not attempt to zero the monitor while the sampling
tube is in the patient’s airway.
Do not attempt zeroing if the temperature is not stable.
Zeroing with CO2 in sampling tube can lead to
inaccurate measurements or other error conditions. If
you attempt zeroing while CO2 remains in sampling
tube, the time required to zero the monitor may be
increased.
5.8 Calibration
The monitor has already been calibrated before leaving
factory. User can directly apply it to measuring in normal
conditions, to the exclusion of the below conditions.
For Sidestream CO
2
module, please carry out gain calibration
and manual offset calibration, when the following conditions
happened:
——The module has been used for between half a year and
one year.
——The accuracy of CO
2
reading has been doubted by
clinical physician.
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