Monitoring
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Instructions for Use Fabius MRI SW 3.n
1 During the calibration period, the word »CAL«
replaces the O2 value in the oxygen monitoring
window. Upon successful completion of the cal-
ibration, the O
2 measurement value will be
restored.
If, at the end of the calibration period, the
»O2 SENSOR FAIL!« Advisory message appears
in the Alarm window, the calibration was not suc-
cessful.
An unsuccessful calibration can be caused by sev-
eral conditions as described in the following table.
Cause Remedy
Sensor was exposed to an excessively lean or
excessively rich oxygen calibration mixture.
Make sure that the sensor is exposed to room air
for the entire calibration period.
Sensor was exposed to a constantly changing
calibration mixture.
Make sure that the sensor is exposed to room air
for the entire calibration period.
Sensor did not receive the proper waiting period. If the sensor capsule was removed from the sen-
sor assembly, a waiting period equal to the time
that the capsule spent outside the sensor assem-
bly is necessary prior to calibration. New sensors
require a 15-minute waiting period.
Sensor is exhausted. If the oxygen sensor has decayed beyond its
useful service life (see the “Specifications” sec-
tion of the manual), replace the exhausted sen-
sor with a new sensor and allow the proper
waiting period.
Sensor is disconnected. When the sensor is disconnected or if there is no
cell in the housing, the display area is blank, and
the message »O2 SENSOR FAIL!« appears in
the Alarm window. If this happens, ensure that
the sensor is correctly assembled and recalibrate
the oxygen sensor.
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