Rev 3.1 10. EtCO2 178
BM5 (CS,CX) User’s Manual
10.4 TROUBLESHOOTING
Following is a list of some of the message that may appear on the monitor when monitoring
CO2. The message should clear when normal operating criteria are met or a solution is
found.
* SENSOR OVER TEMP
- Cause : The sensor temperature is greater than 40’C
- Solution : Make sure sensor is not exposed to extreme heat(heat lamp,etc.)
* SENSOR FAULTY
- Cause: One of the following conditions exist : Capnostat Source Current Failure
EEPROM Checksum Faulty , Hardware Error
- Solution : Check that the sensor is properly plugged in. Reinsert or reset the sensor if necessary.
* SENSOR WARM UP
- Cause : Sensor under temperature , Temperature not stable, Source Current unstable
- Solution : This error condition is normal at startup. This error should clear when the warm up is
complete.
* CHECK SAMPLING LINE
- Cause : This error occurs whenever the pneumatic pressure is outside the expected range.
- Solution : Check that the sampling line is not occluded or kinked. Replace the sample line
* ZERO REQUIRED
- Cause : Zero Required , Zero Error
- Solution : To clear, check airway adapter and clean if necessary. If this does not correct the
error, perform an adapter zero. If you must adapter zero more than once, a possible
hardware error may exist.
* CO2 OUT OF RANGE
- Cause : The value being calculated is greater than the upper CO2 limit( 150mmHg )
- Solution : If error persists, perform a zero.
* CHECK AIRWAY ADAPTER
- Cause : Usually caused when the airway adapter is removed from the Capnostat or when there
is an optical blockage on the windows of the airway adapter. May also be caused by
failure to perform Capnostat zero to when adapter type is changed.
- Solution : To clear, clean airway adapter if mucus or moisture is seen. If the adapter is clean,
perform a Capnostat zero.
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