Patient Monitor User’s manual
14-11
Exhaust gases should be returned to the patient circuit or a scavenging
system.
Always use a bacteria filter on the evac side if sampled gas is intended
to be re-breathed.
Do not place the sidestream AG module in any position that might
cause it to fall on the patient.
Caution: Do not operate the sidestream AG module outside the
specified operating temperature environment.
14.7 AG Maintenance
14.7.1 Zeroing
Mainstream AG module:
In order to ensure the accuracy of gas measurement, zero reference
calibration should be performed at regular intervals.
Under the following conditions, it is necessary to perform zero reference
calibration:
——The measured reading occurs error;
——A“Zero Required” alarm message is displayed;
——Airway adapter is replaced.
As following procedures:
1. Snap a new AG airway adapter onto the AG sensor. Ensure that the airway
adapter is not connected to the breath circuit of patient. The presence of
ambient air (21% O
2
and 0% CO
2
) in the AG airway adapter is very
important.
2. Wait for the sensor to warm up:
——For IRMA CO
2
sensor: Allow 10s for warm up of the sensor after power
on and after changing the IRMA airway adapter;
——For IRMA AX+ sensor: Allow 30s for warm up of the sensor after power
on and after changing the IRMA airway adapter.
3. Select【PHASEIN Zero】in the AG parameter setting menu, this will start
zeroing. The monitor zeroes the module and displays the“Zeroing”
message for about 5s.
4.
There will be a blinking green light on the AG sensor LED during 5s while
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