BeneVision N22/N19 Patient Monitor Operator’s Manual 22 - 13
• Do not touch the galvanic oxygen sensor diffusion membrane during replacement of the sensor.
• Properly dispose of galvanic oxygen sensor according to local regulations.
• Always prepare an unopened spare galvanic oxygen sensor for replacement of the exhausted one.
• If there is no new galvanic oxygen sensor for replacement, install a dummy sensor to prevent the
module from leakage.
22.15 Calibrating the Galvanic Oxygen Sensor
For correct measurements, an unused galvanic oxygen sensor has to be pressure calibrated prior to use. To
calibrate the galvanic oxygen sensor, follow this procedure:
1. Plug the sidestream CO
2
module into the SMR after a new galvanic oxygen sensor is installed.
2. Remove the gas sample line from the watertrap and the after you see the message
CO2 Starting disappear.
3. After 15 seconds, access the
Oxygen Cell Calibration page from the CO2 menu.
4. Select
Calibrate.
After the pressure calibration, the message
Calibration Completed is displayed on the Oxygen Cell Calibration
page of the
CO2 menu.
• The gas sample line shall not be connected to the watertrap during pressure calibration of the
galvanic oxygen sensor.
• You can also perform a pressure calibration if the measurement of the galvanic oxygen sensor is
inaccurate.
22.16 CO
2
Calibration
For sidestream or microstream CO
2
modules, a calibration should be performed once a year or when the readings
go far beyond the range. For more information, see
38 Maintenance.
22.17 CO
2
Troubleshooting
This section lists the problems that might occur. If you encounter the problems when using the equipment or
accessories, check the table below before requesting for services. If the problem persists, contact your service
personnel.
• For the physiological and technical alarm messages, see D Alarm Messages.
22.17.1 Troubleshooting the Sidestream/Microstream CO
2
Module
Problem Solution
EtCO
2
measurements too low 1. Ventilate the room if the environmental CO
2
concentration is too
high.
2. Check the sample line and connectors for leakage.
3. Check the patient status.
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