NDD easyone pro, Operator'S Manual, Page: 90 / 188

Quality Messages and Quality Grades
90 EasyOne Pro™ / EasyOne Pro™ LAB
Test error: CO-Calib
CO calibration could
not be performed: no
gas connected to the
system or Instru-
ment failure
CO calibration could not be per-
formed: Instrument failure and/or
no gas connected to the system Make sure the gas supply is con-
nected and open
Test error: Time delay
Test cannot be evalu-
ated; gas signals do
not pass QC check,
automatic delay cor-
rection failed
Automatic time delay correction
failed Repeat test correctly
Test error: Tidal
breathing
Test cannot be evalu-
ated; no tidal breath-
ing detected prior to
DLCO maneuver
No tidal breathing has been
detected before the test Repeat test correctly
Test error: CO-Insp
Drift
Maneuver not
acceptable; no sta-
ble CO signal during
breath-hold
During breath-hold, CO signal
drifts up or down Check spirette
™
und barriette
™
position, check connections,
check DLCO valve unit
3-point calibration
failed (1) S-factor of the CO sensor outside
0.16 to 0.375 If the error occurs repeatedly, then
please contact service.
3-point calibration
failed (2) 3-point calibration mixture out-
side 750 to 1600 ppm CO If the error occurs repeatedly, then
please contact service.
3-point calibration
failed (3) Standard deviation of CO during
3-point calibration greater than
25 ppm If the error occurs repeatedly, then
please contact service.
CO concentration too
high (clip) CO sensor out of range If the error occurs repeatedly, then
please contact service.
CO sensor drift too
high CO drift during measurement
> 150 ppm Repeat the test. If the error occurs
again after the device has
warmed-up, then please contact
service.
Message
Criterion
Recommended action