Section 5 - Operation
Oxygen Monitoring
calibration, the calibration will be invalidated, as shown by a blank %
OXYGEN display area at the end of the calibration period, and the
Advisory messages O2 NOT CAL, O2 ALRM OFF, and O2 SENS ERR.
O2 CAL DUE
(Advisory)
The Advisory message O2 CAL DUE appears on the central alarm
display when more than 18 hours have elapsed since the last calibration.
O2 NOT CAL
(Advisory)
The Advisory message O2 NOT CAL appears on the central alarm
display in the following circumstances:
• the oxygen sensor enters a noncalibrated state
• an attempt to calibrate the oxygen sensor was unsuccessful
O2 ALRM OFF
(Advisory)
The Advisory message O2 ALRM OFF appears on the central alarm
display when the patient alarms for the O2 analyzer are disabled. This
message always occurs in conjunction with the O
2
NOT CAL message.
O2 CAL ERR
(Advisory)
The Advisory message O2 CAL ERR appears on the central alarm
display when the sensor is improperly calibrated. This message may
appear during monitoring or during calibration.
During monitoring, if the calculated oxygen concentration exceeds 103%,
the Advisory message O2 CAL ERR appears on the central alarm display
and remains there until a new calibration is performed. (A calculated
oxygen concentration of 100% is displayed for all values ≥ 100%.)
During monitoring, if the calculated oxygen percentage exceeds 105%,
the oxygen analyzer invalidates the present calibration. The display area
is blanked, and the Advisory messages O2 CAL ERR, O2 NOT CAL, and
O2 ALRM OFF appear on the central alarm display. The display area
remains blank until a new calibration is performed.
During calibration, if the sensor is exposed to a constantly changing gas
mixture, the calibration will be invalidated; the O2 CAL ERR Advisory
message will also replace the O2 SENS ERR message normally used for
an invalidated calibration.
Low Oxygen Supply
Whistle
If the Narkomed 2B is configured to do so, it sounds a 7-second whistle
when the oxygen supply drops too low to properly pressurize the fresh
gas circuit (below about 37 psi). If this alarm sounds, it cannot be
silenced.
5-10-10
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