Patient Monitor User’s manual
14-12
Zero Reference calibration is in progress. Wait until the AG indicating
lamp light on green and the reading of oxygen on the screen is“21”.(When
using CO
2
module, the reading of CO
2
on the screen is“0”.) The message
disappears upon completion of the zeroing.
Warning: Incorrect zero reference calibration will result in false gas
readings.
Caution: User may only perform zero reference calibration under the
instruction of the technical personnel authorized by
manufacturer.
Sidestream AG module:
The sidestream AG module needs to establish a zero reference level for the
CO
2
, N
2
O and anesthetic agent gas measurement. This zero calibration is here
referred to as "zeroing".
The sidestream AG module performs zeroing automatically by switching the
gas sampling from the respiratory circuit to ambient air. The automatic zeroing
is performed every 24 hours, and takes less than 3s for CO
2
module and less
than 10s for AG module.
If the sidestream AG module is fitted with an oxygen sensor, the automatic
zeroing will also include room air calibration of the oxygen sensor.
Warning: Since a successful zeroing requires the presence of ambient
air (21% O
2
and 0% CO2) in the AG module, ensure that the
AG module is placed in a well ventilated place. Avoid
breathing near the sidestream AG module before or during
the zeroing procedure.
14.7.2 Preventive maintenance
Maintenance for sidestream AG module
The sidestream AG module is permanently factory calibrated. The module’s
stable design, results in no routine calibrations. If you want to conduct a
maintenance task for the module, please contact manufacturer or the
professional person authorized by manufacturer.
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