Product Manual

M3B Vital Signs Monitor Service Manual
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for CO
2
monitoring function. Before you using the CO
2
module, you can do zero calibration by
ZERO CAL in CO
2
SETUP.
Zero Calibration:
Enter SYSTEM MENU → CO2 SETUP, the menu displays:
Figure4-3 CO
2
Gain Calibration
ZERO CAL: used to perform zero calibration for CO
2
module.
When a dramatic change in CO
2
measurement or the accuracy of reading is suspected by the
clinician, please select “ZERO CAL” item, then the system will automatically inhale clean room
air to the air inlet of CO
2
module beside the monitor, and start zero calibration.
When the zero calibration is started, there will be prompts:
Zeroing
Zero successfully
Zero required
Zero started
Zero not ready
Breath detected
If the breath is detected during the zero calibration, it will prompt “Breath detected”. After the
zero calibration is finished successfully, it will prompt “Zero successfully”.
The Zero calibration is intended to decrease the effect caused by baseline drifting. When doing
calibration, the item ZERO CAL in CO
2
SETUP menu is unavailable. After the Zero calibration
is finished successfully, the item is reactive.