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Setting up Mainstream and Sidestream CO
2
14 Monitoring Carbon Dioxide
183
Suppressing Zero Calibration
To prevent an automatic zero calibration from being started in the next five minutes,
♦ in the Setup CO
2
menu, select No Zero for 5 Min, or select the Suppress CO2 Zero
SmartKey, if configured.
Selecting
No Zero for 5 Min or selecting the Suppress CO2 Zero SmartKey again before the
timer has timed out resets the timer to five minutes, unless an AutoZero became due during the
previous suppression.
Setting up Mainstream and Sidestream CO
2
These tasks are common to all CO
2
measurements except where otherwise noted.
Adjusting the CO
2
Wave Scale
1 In the CO
2
Wave menu or the Setup CO
2
menu, select Scale.
2 Choose a suitable scale range from the pop-up list.
Setting up CO
2
Corrections
Temperature, water vapor in the patient’s breath, barometric pressure, and the proportions of O
2,
N
2
O
and Helium in the mixture all influence CO
2
absorption. If values seem inaccurately high or low,
check that the monitor is using the appropriate corrections.
Correction
Altitude
(M3014A
only)
Altitude is set during installation. The monitor automatically applies an appropriate
correction.
O
2
(M3014A
only)
In the Setup CO2 menu, select Oxygen Corr and select a value between 0% and
100%, the default value is 16%.
If the O
2
correction is not available in the Setup CO2 menu, the CO
2
measurement
in your Measurement Server Extension does not require O
2
correction.
Humidity At installation, the monitor is configured to automatically apply either Body Temperature
Pressure Saturated (BTPS) or Standard Temperature Pressure Dry (STPD). To see
which, go to the
Setup CO2 menu, and scroll down to look at HumidtyCorr.
N
2
O
(M3016A
mainstream
and M3015A
microstream
only)
In the Setup CO2 menu, select N2O Corr and turn on or off. If N
2
O is present in
the ventilation gas mixture, you must turn this on.
If the N
2
O correction is not available in the Setup CO2 menu, the CO
2
measurement in your Measurement Server Extension does not require N
2
O correction
or it is setup with
Gas Corr (see below).
Gas
(M3014A
only)
In the Setup CO2 menu, select Gas Corr and select Helium, N2O or turn off. If
Helium or N
2
O is present in the ventilation gas mixture, you must make the
appropriate selection.
If the Gas correction is not available in the
Setup CO2 menu, the CO
2
measurement
in your Measurement Server Extension does not require N
2
O or Helium correction or
the N
2
O correction is setup with N2O Corr (see above).