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1.4 Component Identification
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3 1/2 DIGIT DISPLAY— The LCD provides direct readout of oxygen concentration, gas flow
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and gas pressure. The LCD also displays error codes as necessary.
MODE BUTTON — Switches between measuring the concentration of gas produced by an
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oxygen concentrator and pure oxygen (for calibration verification).
ON/OFF BUTTON — Turns the device on or off.
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PSI — Indicates the pressure measurement is in units of pounds per square inch.
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KPA — Indicates the pressure measurement is in units of kilopascals.
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GAS SAMPLE INLET — Used to receive the gas sample.
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% SYMBOL — This is the port at which the device is connected to deter mine oxygen
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concentration.
LOW BATTERY INDICATOR — Indicates the voltage of the batteries is below normal
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operating levels.
LPM — Illuminated next to the flow measurement. (Not shown when in calibration
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verification mode).
GAS SAMPLE OUTLET— Used as an outlet for the gas sample and as a trigger for pressure
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measurement when occluded.
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BATTERY DOOR
GAS SAMPLE TUBING — Used to connect to gas sample sources (not shown).
2 OPERATING INSTRUCTIONS
2.1 Oxygen, Flow and Pressure Measurement
To check oxygen concentration, flow and pressure of a gas sample from a concentrator:
1. Connect the gas sample tubing to the gas sample inlet of the UltraMaxO2.
2. Attach the other end of the gas sample tubing to the oxygen concentrator.
3. Initiate the flow of gas to the UltraMaxO2 at a rate of 1-10 liters per minute (2 liters per
minute is recommended). Ensure the concentrator's output is stable per the
concentrator manufacturer's recommendations.
4. Turn on the UltraMaxO2.
5. Allow the oxygen reading to stabilize for approximately 10 seconds before reading the
oxygen concentration and flow.
6. To check pressure, cover the gas sample outlet with thumb or finger while gas is
flowing.
7. Wait 5 seconds for the display to read pressure.
DO NOT hold the mode button while checking a concentrator or the reading will be
inaccurate.
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2.2 Switching Pressure Units of Measure
The UltraMaxO2 can measure pressure in PSI or kPa. The UltraMaxO2 is factory set to measure in
PSI. To switch to kPa:
1. Using a #1 Phillips screwdriver loosen the battery door screw and remove the battery
door.
2. Toggle the switch inside the battery compartment.
3. Replace the battery door and tighten the battery door screw.
2.3 Calibration Verification Procedure
A calibration verification mode is provided to verify that the UltraMax O2 is functioning properly.
To perform the calibration verification:
1. Turn on the UltraMax O2.
2. Connect a source of pure oxygen ( ≥ 99.95%) to the gas sample inlet.
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3. Flow 2-5 LPM of gas into the UltraMax O2. Ensure that the gas flowing to the UltraMax O2
is at a stable temperature.
4. Press and hold the mode button. While holding the mode button, the gas measurement
should read between 98.5 and 101.5% oxygen. If the gas measurement is not within this
range, call Maxtec Customer Service. Calibration verification mode is indicated by "CAL"
and "VER" flashing on screen beneath the gas measurement.
3 FACTORS INFLUENCING
ACCURATE READINGS
3.1 Effects of Temperature
The UltraMax O2 compensates for temperature and will perform within specifications through-
out the operating temperature range. However, taking measurements during rapid changes in
gas temperature should be avoided.
3.2 Effects of Humidity
The UltraMax O2 has a humidity sensor to detect and compensate for the humidity of gas enter-
ing the device. However, high levels (condensing) of humidity can affect the accuracy and reli-
ability of the UltraMax O2. To prevent possible damage:
Avoid usage in environments of greater than 95% relative humidity.
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DO NOT use this device in a breathing circuit.
DO NOT breathe or blow into the UltraMaxO2.
3.3 Effects of Other Gases
The UltraMaxO2 is designed to measure two different types of gas mixtures:
Oxygen, nitrogen and argon from oxygen concentrators.
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Pure oxygen during calibration verification mode.
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Any other concentrations or combinations of gases will cause the UltraMaxO2 to measure oxy-
gen concentration incorrectly.
3.4 Effects of Low Flow
Oxygen concentrators function on the principle of removing nitrogen gas from air, leaving con-
centrated 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 ni-
trogen, possibly due to an increase in argon content. The UltraMax O2 requires that the ratio of
oxygen to argon remain constant in order to guarantee an accuracy of +/-1.5% oxygen.
DO NOT use the UltraMax O2 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.
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