24
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Readings erratic
Sensor has lost bias
1.
Place the device into the docking
station or connect directly to the USB
cable which must be connected to a
power source.
2.
Once power has been restored to the
device and sensor battery wait 24
hours for sensor to regain bias
Readings abnormally low
Smoking status
Medications
Age/sex
Respiratory manoeuvres
Airway calibre
See ‘Contraindications section’
Pump running too slow
1.
Consult service manual if you have
undergone service training.
2.
Contact your local Bedfont®
representative
Pump not running
1.
Consult service manual if you have
undergone service training.
2.
Contact your local Bedfont®
representative
NO Scrubber not inserted
3.
Remove service door
4.
Insert NO scrubber (see ‘preventive
maintenance’)
Pump running but nothing can be
seen on screen
Screen brightness too low
Check screen brightness, if able. (see ‘screen
brightness’ section)
Component/software failure
Contact your local Bedfont® representative
Pump not running
Device is switched off
Switch on device
Pump running too slow
1.
Consult service manual if you have
undergone service training.
2.
Contact your local Bedfont®
representative
Pump not running
1.
Consult service manual if you have
undergone service training.
2.
Contact your local Bedfont®
representative
Breath test failed
Patient did not keep a constant flow
Retry test keeping a constant flow using the on-
screen incentive as a guide
Mouthpiece not sealing with device
1.
Push mouthpiece firmly into
mouthpiece aperture
2.
Visually inspect if o’ring is present
inside mouthpiece aperture
3.
Try an alternative mouthpiece
Pump not running
1.
Consult service manual if you have
undergone service training.
2.
Contact your local Bedfont®
representative
Internal electrochemical switch stuck or
failed
1.
Consult service manual if you have
undergone service training.
2.
Contact your local Bedfont®
representative
Calibration failed
Wrong gas concentration
Check gas concentration is correct (see ‘gas
calibration’ section)
Wrong flow rate used
Check flow meter or regulator is set to 1 L/pm
Flow meter or regulator not open
Check flow meter or regulator is open and set to
1 L/pm
Clock displays 00/00/00 or date
has been lost
Real-time clock (RTC) has been reset
Set time and date (see ‘Change the date/time’
section)
