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4
3.0 FACTORS INFLUENCING ACCURATE READINGS
3.1 Effects of Temperature
The UltraMaxO
2
compensates for temperature and will perform within specifications
throughout the operating temperature range. However, taking measurements during
rapid changes in gas temperature should be avoided.
3.2 Effects of Humidity
The UltraMaxO
2
has a humidity sensor to detect and compensate for the humidity of
gas entering the device. However, high levels (condensing) of humidity can affect the
accuracy and reliability of the UltraMaxO
2
. To prevent possible damage:
•
Avoid usage in environments of greater than 95% relative humidity.
•
DO NOT
use this device in a breathing circuit.
•
DO NOT
breathe or blow into the UltraMaxO
2
.
3.3 Effects of Other Gases
The UltraMaxO
2
is designed to measure two different types of gas mixtures:
•
Oxygen, nitrogen and argon from oxygen concentrators.
•
Pure oxygen during calibration verification mode.
Any other concentrations or combinations of gases will cause the UltraMaxO
2
to
measure oxygen concentration incorrectly.
3.4 Effects of Low Flow
Oxygen concentrators function on the principle of removing nitrogen gas from air,
leaving concentrated oxygen and argon at a specific oxygen to argon ratio. This
operating principle may be altered when concentrators are set to flow at the low end of
their operational range. At low flows they may output a low oxygen concentration, e.g.
85% to 91%, for reasons other than high nitrogen, possibly due to an increase in argon
content. The UltraMaxO2 requires that the ratio of oxygen to argon remain constant in
order to guarantee an accuracy of +/-1.5% oxygen.
•
DO NOT use the UltraMaxO
2
to measure the oxygen concentration of a
concentrator when flowing at rates lower than its optimal performance as specified
by the concentrator manufacturer; generally 4 LPM or less on concentrators that
have a maximum flow of 10 LPM, and 1 LPM or less on concentrators that have a
maximum flow of 5 LPM.
4.0 ERROR CODES
The UltraMaxO2 has self diagnostic features built into the software to detect
faulty readings outside of normal operating ranges. The codes, descriptions and
recommended actions are:
•
E01:
Oxygen measurement out of range Hi (
≥
102.0% calculated by algorithm).
Recommended Action: Verify that the UltraMaxO
2
is being used in the correct
mode (Concentrator or Calibration Verification mode). If error code repeats;
perform a calibration verification per section 2.3 of this manual. If error code
repeats again; contact Customer Service.
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