Digicare Biomedical Technology
Operators Manual Multi-parameter Patient Monitor " LifeWindow Lite LW8 "
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C. CALIBRATION
• The LifeWindow™ Lite LW8 should be calibrated before each use and every 8 hours to
maintain maximum accuracy.
1 – ONE POINT CALIBRATION
• As with most oxygen analyzer(s) the highest level of accuracy is achieved when calibration is
conducted using 100% oxygen.
• One Point Calibration procedure is used as a option when a 100% oxygen is not available.
• After installing the flow diverter keep the oxygen sensor exposed to fresh air.
• The actual FIO2 reading will be displayed and it should be close to the local atmospheric
oxygen content ( ex. 21% ).
• Touch the FIO2 menu and select CAL 1 Point. The message: “Are you sure you want to
make a 1 point calibration on FIO2?” is displayed. Press Yes.
• In the Low Point FIO2 Calibration screen, select the O2 concentration (default 21%). Make
sure the oxygen sensor is exposed to the selected O2 concentration and press enter to start
calibration. The FIO2 reading will change to the Value selected.
2 – TWO POINT CALIBRATION
• As with most oxygen analyzer(s) the highest level of accuracy is achieved when calibration is
conducted using Two Point Calibration with 100% oxygen.
• After installing the flow diverter keep the oxygen sensor exposed to fresh air.
• The actual FIO2 reading will be displayed and it should be close to the local atmospheric
oxygen content ( ex. 21% ).
• Touch the FIO2 menu and select CAL 2 Point. The message: “Are you sure you want to
make a 2 point calibration on FIO2?” is displayed. Press Yes.
• In the Low Point FIO2 Calibration screen, select the O2 concentration (default 21%). Make
sure the oxygen sensor is exposed to the selected O2 concentration.
• Select in the High Point FIO2 Calibration screen the second calibration point (100% default).
• Expose the oxygen sensor to the selected O2 concentration (default 100%) supply of pure dry
oxygen flowing at 1 – 2 liters per minute. Wait about 20 seconds to insure the sample line is
completely purged with the calibration gas and press Enter to calibrate.
• Remove the sensor from the oxygen supply and confirm the FIO2 indicator reads less than
22% in room air.
• It is important to perform the calibration carefully and thoroughly, using calibration gases that
are free from contaminates. Wait for a stable reading before locking in calibration point.
3 – DEFAULT CALIBRATION
• The Default Calibration procedure returns the FIO2 function calibration to factory default
calibration.
• To return the FIO2 function to the factory default calibration touch the FIO2 menu and touch
the Cal Default button.
D. FIO2 MONITORING
• The LifeWindow™ Lite LW8 can be used to measure a gas mixture for oxygen in two basic
modes:
• In the inhalation side of breathing circuit ahead of humidifiers and medicating devices or other
instances where gases are flowing to a patient in breathing circuits. When monitoring oxygen
in breathing circuits, the flow diverter must be used.
•
In confined volumes such as tents and hoods. In these applications the flow diverter must be
removed from the sensor so that it does not interfere with the rapid exchange of gases to and
from the sensing surface of the sensor.
Summary of Contents for LifeWindow Lite LW8
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