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Chapter 13: GAS Monitoring (Mainstream)
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Zeroing
Pick "ZERO" in GAS WINDOW to call up the following menu:
IRMA CO2 probes:
Zeroing needs to be performed ONLY when an offset in gas values is observed, or when an
unspecified accuracy message is displayed, "CO2 ACCURACY INVALID, PLEASE ZERO".
Allow 10 seconds for warm up of the IRMA CO2 probes after power on before proceeding with
the Zeroing Procedure.
Allow the IRMA probe to warm up for at least 10 seconds after changing the IRMA airway
adapter before transmitting the Zero reference command.
IRMA AX+ probes:
Zeroing should be performed every time the IRMA airway adapter is replaced, or whenever
an offset in gas values or an unspecified gas accuracy message is displayed, "CO2 ACCURACY
INVALID, PLEASE ZERO".
Allow 30 seconds for warm up of the IRMA AX+ probes after power on and after changing the
IRMA airway adapter before proceeding with the Zeroing Procedure. The green LED on the
probe will be blinking for approximately 5 seconds while zeroing is in progress.
If you press zero before passing this time, the message "CO2 UNABLE TO ZERO, SENSOR
WARMING UP" will be shown and zeroing procedure won't be done
Zeroing:
In order to secure high precision of the IRMA probe measurements the following zeroing
recommendations should be followed.
13-18
User Manual
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