13 Monitoring Carbon Dioxide
217
Preparing to Measure Mainstream CO2
1 Attach the transducer connector to the CO
2
connector on the M3016A extension.
2 Wait 20 minutes, allowing the transducer to reach its operating temperature and a stable thermal
condition.
3 Perform an accuracy check and then, if necessary, calibrate the transducer.
Checking Transducer Accuracy
WARNING
Check transducer accuracy at least once a week or if you doubt the CO
2
readings.
1 In Setup CO₂ menu, select Cal. Mode to switch on calibration mode.
2 Look at the calibration value displayed in the Setup CO₂ menu next to Start CAL1. Is it the same
as the value on the calstick? If not, calibrate the transducer now.
3 Place the transducer on the low cell of the calstick (labeled 0.0 mmHg or "ZERO"). The reading
on the screen should be zero within ±1 mmHg within one minute.
4 Place the transducer on the high cell of the calstick. The reading on the screen should be within ±1
mmHg of the value on the calstick within one minute.
5 If both readings are in range, you can leave calibration mode and begin monitoring. If either of the
readings is out of range, calibrate the transducer.
Calibrating the Transducer
1 Check that the windows on the calstick are clean and clear.
2 Place the transducer on one of the calstick cells and select Start CAL1.
3 Enter the calibration value printed on the calstick then press Confirm to start calibration.
4 When the message CO₂ CAL1 calibration done -- Start CAL2 calibration appears, put the
transducer on the other cell and select
Start CAL2 then press Confirm.
5 When you see the message CO₂ calibration completed - leave Cal. Mode, calibration is
complete.
6 Select Cal. Mode to switch calibration mode off. You cannot monitor in calibration mode.
Attaching and Removing the CO2 Transducer
1 Open the latch and place the transducer (B) onto the airway adapter (A). Place the airway adapter
in the patient's breathing circuit between the endotracheal tube and the Y-piece. You may see the
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