User's Manual

Ultraview Care Network
22-20
100% O
2
Span Calibration
The 100% O
2
Span is used to calibrate the response of the oxygen sensor to
100% O
2
. This function sets the level for oxygen so the monitor displays 100%
when pure oxygen is input to the unit.
The 100% O
2
Span calibration should be performed monthly or whenever the
FiO
2
value is not between 98% and 100% when sampling pure (100%) oxygen.
The 100% O
2
calibration must be done correctly. A source of pure O
2
with
adequate flow is required to perform this calibration. Some institutions rely on their
biomedical engineering department to perform this calibration. When the 100% O
2
calibration is completed successfully, the monitor displays a normal screen with
measured values of all gases.
Further action is needed if an O
2
SPAN FAILURE message or an O
2
CELL
REPLACEMENT REQUIRED message displays on the screen. However, the gas
analyzer is still functioning and all Agent, CO
2
, and N
2
O values remain accurate.
The unit can continue to be used until the required action can be performed. To
remove the message from the screen, simply touch the GAS key and then the
NORMAL SCREEN key of the monitor.
O
2
Cell Replacement
To change an O
2
cell, plan on the analyzer to be out of operation for
approximately 2-hours. Therefore, if the day begins with a CHECK O2 SENSOR
calibration and it is found that additional calibration or O
2
sensor replacement is
required, you can simply schedule that within your department (when the
biomedical engineers are available). You may continue to use the analyzer until
there is time to re-calibrate the unit or change the sensor.
Autozero Calibration
To guarantee accurate readings, the zero reference of the multigas analyzer is
automatically calibrated on a regular basis. Autozero calibrations last less than
1.5-seconds and are performed without notice to the user.
The interval between autozero calibrations depends upon the amount of time the
unit operates (either in normal or stand by mode). After the unit has been ON for
at least 30-minutes, and has become thermally stable, autozero occurs in normal
mode at approximately 10-minute intervals.
CAUTION:
• If the message ??? appears in the numerics of FiO
2
and
FeO
2
at any time you are monitoring a patient, you must
perform a check O
2
sensor test.
CAUTION:
• Performing a 100% O
2
span calibration without using the
proper concentration and flow of oxygen will result in span
calibration failure.
To span calibrate O
2
sensor with
100% O
2
:
1 Allow unit to stabilize for
30-minutes.
2 Touch GAS.
3 Touch CAL.
4 Disconnect the sample line
from patient.
5 Connect the sample line to the
sampling port of an airway
T-adapter.
6 Connect the airway T-adapter
to a source of 100% oxygen
supply.
7 Adjust the oxygen supply to
flow through the T-adapter at a
rate of approximately 500
ml/min.
8 Wait for O
2
value to stabilize.
9 Touch 100% O2 SPAN.
10 Select YES.
11 At completion of successful
test, normal monitoring will
resume.